[clangd] Support simpler JSON-RPC stream parsing for lit tests.

[sammccall]

Summary

Instead of content-length, we delimit messages with ---.
This also removes the need for (most) dos-formatted test files.

[ioeric]

LGTM

Have we kept a lit test that uses content-length? It's unclear from the patch.

clangd/tool/ClangdMain.cpp

89

To be more specific, maybe --lit-test-mode?

[sammccall]

In D42919#998695, @ioeric wrote:

LGTM

Have we kept a lit test that uses content-length? It's unclear from the patch.

Yes, protocol.test tests the real protocol parser. (The other tests that use this parser are are too_large, which i'll merge with protocol, and input_mirror, which i'll cut down a little bit, as followup)

clangd/tool/ClangdMain.cpp

89

changed to --lit-test. ("mode" seems redundant in a flag name?)

[sammccall]

-test -> -lit-test

clangd/ClangdLSPServer.h

ClangdLSPServer(JSONOutput &Out, unsigned AsyncThreadsCount,
                   SymbolIndex *StaticIdx = nullptr);
 
   /// Run LSP server loop, receiving input for it from \p In. \p In must be
   /// opened in binary mode. Output will be written using Out variable passed to
   /// class constructor. This method must not be executed more than once for
   /// each instance of ClangdLSPServer.
   ///
   /// \return Wether we received a 'shutdown' request before an 'exit' request
-  bool run(std::istream &In);
+  bool run(std::istream &In,
+           JSONStreamStyle InputStyle = JSONStreamStyle::Standard);
 
 private:
   // Implement DiagnosticsConsumer.
   virtual void
   onDiagnosticsReady(PathRef File,
                      Tagged<std::vector<DiagWithFixIts>> Diagnostics) override;
 
   // Implement ProtocolCallbacks.

clangd/ClangdLSPServer.cpp

ClangdLSPServer::ClangdLSPServer(JSONOutput &Out, unsigned AsyncThreadsCount,
                                  llvm::Optional<Path> CompileCommandsDir,
                                  bool BuildDynamicSymbolIndex,
                                  SymbolIndex *StaticIdx)
     : Out(Out), CDB(std::move(CompileCommandsDir)), CCOpts(CCOpts),
       Server(CDB, /*DiagConsumer=*/*this, FSProvider, AsyncThreadsCount,
              StorePreamblesInMemory, BuildDynamicSymbolIndex, StaticIdx,
              ResourceDir) {}
 
-bool ClangdLSPServer::run(std::istream &In) {
+bool ClangdLSPServer::run(std::istream &In, JSONStreamStyle InputStyle) {
   assert(!IsDone && "Run was called before");
 
   // Set up JSONRPCDispatcher.
   JSONRPCDispatcher Dispatcher([](const json::Expr &Params) {
     replyError(ErrorCode::MethodNotFound, "method not found");
   });
   registerCallbackHandlers(Dispatcher, Out, /*Callbacks=*/*this);
 
   // Run the Language Server loop.
-  runLanguageServerLoop(In, Out, Dispatcher, IsDone);
+  runLanguageServerLoop(In, Out, InputStyle, Dispatcher, IsDone);
 
   // Make sure IsDone is set to true after this method exits to ensure assertion
   // at the start of the method fires if it's ever executed again.
   IsDone = true;
 
   return ShutdownRequestReceived;
 }
 

clangd/JSONRPCDispatcher.h

public:
   /// Parses a JSONRPC message and calls the Handler for it.
   bool call(const json::Expr &Message, JSONOutput &Out) const;
 
 private:
   llvm::StringMap<Handler> Handlers;
   Handler UnknownHandler;
 };
 
+/// Controls the way JSON-RPC messages are encoded (both input and output).
+enum JSONStreamStyle {
+  /// Encoding per the LSP specification, with mandatory Content-Length header.
+  Standard,
+  /// Messages are delimited by a '---' line. Comment lines start with #.
+  Delimited
+};
+
 /// Parses input queries from LSP client (coming from \p In) and runs call
 /// method of \p Dispatcher for each query.
 /// After handling each query checks if \p IsDone is set true and exits the loop
 /// if it is.
 /// Input stream(\p In) must be opened in binary mode to avoid preliminary
 /// replacements of \r\n with \n.
 void runLanguageServerLoop(std::istream &In, JSONOutput &Out,
+                           JSONStreamStyle InputStyle,
                            JSONRPCDispatcher &Dispatcher, bool &IsDone);
 
 } // namespace clangd
 } // namespace clang
 
 #endif

clangd/JSONRPCDispatcher.cpp

bool JSONRPCDispatcher::call(const json::Expr &Message, JSONOutput &Out) const {
   SPAN_ATTACH(Tracer, "Params", Params);
 
   // Stash a reference to the span args, so later calls can add metadata.
   WithContext WithRequestSpan(RequestSpan::stash(Tracer));
   Handler(std::move(Params));
   return true;
 }
 
-void clangd::runLanguageServerLoop(std::istream &In, JSONOutput &Out,
-                                   JSONRPCDispatcher &Dispatcher,
-                                   bool &IsDone) {
-  while (In.good()) {
-    // A Language Server Protocol message starts with a set of HTTP headers,
-    // delimited  by \r\n, and terminated by an empty line (\r\n).
-    unsigned long long ContentLength = 0;
-    while (In.good()) {
-      std::string Line;
-      std::getline(In, Line);
-      if (!In.good() && errno == EINTR) {
-        In.clear();
-        continue;
-      }
+static llvm::Optional<std::string> readStandardMessage(std::istream &In,
+                                                       JSONOutput &Out) {
 
-      Out.mirrorInput(Line);
-      // Mirror '\n' that gets consumed by std::getline, but is not included in
-      // the resulting Line.
-      // Note that '\r' is part of Line, so we don't need to mirror it
-      // separately.
-      if (!In.eof())
-        Out.mirrorInput("\n");
 
-      llvm::StringRef LineRef(Line);
 
-      // We allow comments in headers. Technically this isn't part
-      // of the LSP specification, but makes writing tests easier.
-      if (LineRef.startswith("#"))
-        continue;
 
-      // Content-Type is a specified header, but does nothing.
-      // Content-Length is a mandatory header. It specifies the length of the
-      // following JSON.
-      // It is unspecified what sequence headers must be supplied in, so we
-      // allow any sequence.
-      // The end of headers is signified by an empty line.
-      if (LineRef.consume_front("Content-Length: ")) {
-        if (ContentLength != 0) {
-          log("Warning: Duplicate Content-Length header received. "
-              "The previous value for this message (" +
-              llvm::Twine(ContentLength) + ") was ignored.\n");
-        }
 
-        llvm::getAsUnsignedInteger(LineRef.trim(), 0, ContentLength);
-        continue;
-      } else if (!LineRef.trim().empty()) {
-        // It's another header, ignore it.
-        continue;
-      } else {
-        // An empty line indicates the end of headers.
-        // Go ahead and read the JSON.
-        break;
-      }
-    }
 
-    // Guard against large messages. This is usually a bug in the client code
-    // and we don't want to crash downstream because of it.
-    if (ContentLength > 1 << 30) { // 1024M
-      In.ignore(ContentLength);
-      log("Skipped overly large message of " + Twine(ContentLength) +
-          " bytes.\n");
-      continue;
-    }
+    return llvm::None;
 
-    if (ContentLength > 0) {
-      std::vector<char> JSON(ContentLength);
-      llvm::StringRef JSONRef;
-      {
-        In.read(JSON.data(), ContentLength);
-        Out.mirrorInput(StringRef(JSON.data(), In.gcount()));
+    std::string JSON(ContentLength, '\0');
+    In.read(&JSON[0], ContentLength);
 
-        // If the stream is aborted before we read ContentLength bytes, In
-        // will have eofbit and failbit set.
-        if (!In) {
-          log("Input was aborted. Read only " + llvm::Twine(In.gcount()) +
-              " bytes of expected " + llvm::Twine(ContentLength) + ".\n");
-          break;
-        }
+      return llvm::None;
+    }
+    return std::move(JSON);
+  } else {
+    log("Warning: Missing Content-Length header, or message has zero "
+        "length.\n");
+    return llvm::None;
+  }
 
-        JSONRef = StringRef(JSON.data(), ContentLength);
-      }
+// For lit tests we support a simplified syntax:
+// - messages are delimited by '---' on a line by itself
+// - lines starting with # are ignored.
+// This is a testing path, so favor simplicity over performance here.
+static llvm::Optional<std::string> readDelimitedMessage(std::istream &In,
+                                                        JSONOutput &Out) {
+  std::string JSON;
+  std::string Line;
+  while (std::getline(In, Line)) {
+    if (!In.eof()) // getline() consumed the newline.
+      Line.push_back('\n');
+    auto LineRef = llvm::StringRef(Line).trim();
+    if (LineRef.startswith("#")) // comment
+      continue;
+
+    bool IsDelim = LineRef.find_first_not_of('-') == llvm::StringRef::npos;
+    if (!IsDelim) // Line is part of a JSON message.
+      JSON += Line;
+    if (IsDelim || In.eof()) {
+      Out.mirrorInput(
+          llvm::formatv("Content-Length: {0}\r\n\r\n{1}", JSON.size(), JSON));
+      return std::move(JSON);
+    }
 
-      if (auto Doc = json::parse(JSONRef)) {
+  if (In.bad()) {
+    log("Input error while reading message!");
+    return llvm::None;
+  } else {
+    log("Input message terminated by EOF");
+    return std::move(JSON);
+  }
+}
+
+void clangd::runLanguageServerLoop(std::istream &In, JSONOutput &Out,
+                                   JSONStreamStyle InputStyle,
+                                   JSONRPCDispatcher &Dispatcher,
+                                   bool &IsDone) {
+  auto &ReadMessage =
+      (InputStyle == Delimited) ? readDelimitedMessage : readStandardMessage;
+  while (In.good()) {
+    if (auto JSON = ReadMessage(In, Out)) {
+      if (auto Doc = json::parse(*JSON)) {
         // Log the formatted message.
         log(llvm::formatv(Out.Pretty ? "<-- {0:2}\n" : "<-- {0}\n", *Doc));
         // Finally, execute the action for this JSON message.
         if (!Dispatcher.call(*Doc, Out))
           log("JSON dispatch failed!\n");
       } else {
         // Parse error. Log the raw message.
-        log("<-- " + JSONRef + "\n");
+        log(llvm::formatv("<-- {0}\n" , *JSON));
         log(llvm::Twine("JSON parse error: ") +
             llvm::toString(Doc.takeError()) + "\n");
       }
-
-      // If we're done, exit the loop.
-      if (IsDone)
-        break;
-    } else {
-      log("Warning: Missing Content-Length header, or message has zero "
-          "length.\n");
-    }
+    }
   }
 }

clangd/tool/ClangdMain.cpp

 // We should probably read a dotfile or similar.
 static llvm::cl::opt<bool> IncludeIneligibleResults(
     "include-ineligible-results",
     llvm::cl::desc(
         "Include ineligible completion results (e.g. private members)"),
     llvm::cl::init(clangd::CodeCompleteOptions().IncludeIneligibleResults),
     llvm::cl::Hidden);
 
+static llvm::cl::opt<JSONStreamStyle> InputStyle(
+    "input-style", llvm::cl::desc("Input JSON stream encoding"),
+    llvm::cl::values(
+        clEnumValN(JSONStreamStyle::Standard, "standard", "usual LSP protocol"),
+        clEnumValN(JSONStreamStyle::Delimited, "delimited",
+                   "messages delimited by --- lines, with # comment support")),
+    llvm::cl::init(JSONStreamStyle::Standard));
+
 static llvm::cl::opt<bool>
     PrettyPrint("pretty", llvm::cl::desc("Pretty-print JSON output"),
                 llvm::cl::init(false));
 
+static llvm::cl::opt<bool> Test(
+    "lit-test",
+    llvm::cl::desc(
+        "Abbreviation for -input-style=delimited -pretty -run-synchronously. "
+        "Intended to simplify lit tests."),
+    llvm::cl::init(false), llvm::cl::Hidden);
+
 static llvm::cl::opt<PCHStorageFlag> PCHStorage(
     "pch-storage",
     llvm::cl::desc("Storing PCHs in memory increases memory usages, but may "
                    "improve performance"),
     llvm::cl::values(
         clEnumValN(PCHStorageFlag::Disk, "disk", "store PCHs on disk"),
         clEnumValN(PCHStorageFlag::Memory, "memory", "store PCHs in memory")),
     llvm::cl::init(PCHStorageFlag::Disk));
llvm::cl::desc(
         "YAML-format global symbol file to build the static index. Clangd will "
         "use the static index for global code completion.\n"
         "WARNING: This option is experimental only, and will be removed "
         "eventually. Don't rely on it."),
     llvm::cl::init(""), llvm::cl::Hidden);
 
 int main(int argc, char *argv[]) {
   llvm::cl::ParseCommandLineOptions(argc, argv, "clangd");
+  if (Test) {
+    RunSynchronously = true;
+    InputStyle = JSONStreamStyle::Delimited;
+    PrettyPrint = true;
+  }
 
   if (!RunSynchronously && WorkerThreadsCount == 0) {
     llvm::errs() << "A number of worker threads cannot be 0. Did you mean to "
                     "specify -run-synchronously?";
     return 1;
   }
 
   // Ignore -j option if -run-synchonously is used.
int main(int argc, char *argv[]) {
   CCOpts.IncludeIneligibleResults = IncludeIneligibleResults;
   CCOpts.Limit = LimitCompletionResult;
   // Initialize and run ClangdLSPServer.
   ClangdLSPServer LSPServer(Out, WorkerThreadsCount, StorePreamblesInMemory,
                             CCOpts, ResourceDirRef, CompileCommandsDirPath,
                             EnableIndexBasedCompletion, StaticIdx.get());
   constexpr int NoShutdownRequestErrorCode = 1;
   llvm::set_thread_name("clangd.main");
-  return LSPServer.run(std::cin) ? 0 : NoShutdownRequestErrorCode;
+  return LSPServer.run(std::cin, InputStyle) ? 0 : NoShutdownRequestErrorCode;
 }

test/clangd/completion.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# RUN: clangd -pretty -run-synchronously -pch-storage=memory < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-
-Content-Length: 186
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"struct S { int a; };\nint main() {\nS().\n}"}}}
-
-Content-Length: 148
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/completion","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":2,"character":4}}}
-#      CHECK:  "id": 1
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": {
-# CHECK-NEXT:    "isIncomplete": false,
-# CHECK-NEXT:    "items": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "detail": "int",
-# CHECK-NEXT:      "filterText": "a",
-# CHECK-NEXT:      "insertText": "a",
-# CHECK-NEXT:      "insertTextFormat": 1,
-# CHECK-NEXT:      "kind": 5,
-# CHECK-NEXT:      "label": "a",
-# CHECK-NEXT:      "sortText": "{{.*}}a"
-# CHECK-NEXT:    },
-#      CHECK:  ]
-# Update the source file and check for completions again.
-Content-Length: 190
-
-{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///main.cpp","version":2},"contentChanges":[{"text":"struct S { int b; };\nint main() {\nS().\n}"}]}}
-
-Content-Length: 148
-
-{"jsonrpc":"2.0","id":3,"method":"textDocument/completion","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":2,"character":4}}}
-#      CHECK:  "id": 3,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": {
-# CHECK-NEXT:    "isIncomplete": false,
-# CHECK-NEXT:    "items": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "detail": "int",
-# CHECK-NEXT:      "filterText": "b",
-# CHECK-NEXT:      "insertText": "b",
-# CHECK-NEXT:      "insertTextFormat": 1,
-# CHECK-NEXT:      "kind": 5,
-# CHECK-NEXT:      "label": "b",
-# CHECK-NEXT:      "sortText": "{{.*}}b"
-# CHECK-NEXT:    },
-#      CHECK:  ]
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":4,"method":"shutdown"}
-
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+# RUN: clangd -lit-test -pch-storage=memory < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"struct S { int a; };\nint main() {\nS().\n}"}}}
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/completion","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":2,"character":4}}}
+#      CHECK:  "id": 1
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": {
+# CHECK-NEXT:    "isIncomplete": false,
+# CHECK-NEXT:    "items": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "detail": "int",
+# CHECK-NEXT:      "filterText": "a",
+# CHECK-NEXT:      "insertText": "a",
+# CHECK-NEXT:      "insertTextFormat": 1,
+# CHECK-NEXT:      "kind": 5,
+# CHECK-NEXT:      "label": "a",
+# CHECK-NEXT:      "sortText": "{{.*}}a"
+# CHECK-NEXT:    },
+#      CHECK:  ]
+---
+# Update the source file and check for completions again.
+{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///main.cpp","version":2},"contentChanges":[{"text":"struct S { int b; };\nint main() {\nS().\n}"}]}}
+---
+{"jsonrpc":"2.0","id":3,"method":"textDocument/completion","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":2,"character":4}}}
+#      CHECK:  "id": 3,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": {
+# CHECK-NEXT:    "isIncomplete": false,
+# CHECK-NEXT:    "items": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "detail": "int",
+# CHECK-NEXT:      "filterText": "b",
+# CHECK-NEXT:      "insertText": "b",
+# CHECK-NEXT:      "insertTextFormat": 1,
+# CHECK-NEXT:      "kind": 5,
+# CHECK-NEXT:      "label": "b",
+# CHECK-NEXT:      "sortText": "{{.*}}b"
+# CHECK-NEXT:    },
+#      CHECK:  ]
+---
+{"jsonrpc":"2.0","id":4,"method":"shutdown"}

test/clangd/crash-non-added-files.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 746
-
-{"jsonrpc":"2.0","id":2,"method":"textDocument/codeAction","params":{"textDocument":{"uri":"file:///foo.c"},"range":{"start":{"line":104,"character":13},"end":{"line":0,"character":35}},"context":{"diagnostics":[{"range":{"start": {"line": 0, "character": 32}, "end": {"line": 0, "character": 37}},"severity":2,"message":"using the result of an assignment as a condition without parentheses"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"place parentheses around the assignment to silence this warning"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"use '==' to turn this assignment into an equality comparison"}]}}}
-#      CHECK:  "error": {
-# CHECK-NEXT:    "code": -32602
-# CHECK-NEXT:    "message": "onCodeAction called for non-added file"
-# CHECK-NEXT:  },
-# CHECK-NEXT:  "id": 2,
-Content-Length: 233
-
-{"jsonrpc":"2.0","id":3,"method":"textDocument/rangeFormatting","params":{"textDocument":{"uri":"file:///foo.c"},"range":{"start":{"line":1,"character":4},"end":{"line":1,"character":12}},"options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "error": {
-# CHECK-NEXT:    "code": -32602
-# CHECK-NEXT:    "message": "onDocumentRangeFormatting called for non-added file"
-# CHECK-NEXT:  },
-# CHECK-NEXT:  "id": 3,
-Content-Length: 153
-
-{"jsonrpc":"2.0","id":4,"method":"textDocument/formatting","params":{"textDocument":{"uri":"file:///foo.c"},"options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "error": {
-# CHECK-NEXT:    "code": -32602
-# CHECK-NEXT:    "message": "onDocumentFormatting called for non-added file"
-# CHECK-NEXT:  },
-# CHECK-NEXT:  "id": 4,
-Content-Length: 204
-
-{"jsonrpc":"2.0","id":5,"method":"textDocument/onTypeFormatting","params":{"textDocument":{"uri":"file:///foo.c"},"position":{"line":3,"character":1},"ch":"}","options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "error": {
-# CHECK-NEXT:    "code": -32602
-# CHECK-NEXT:    "message": "onDocumentOnTypeFormatting called for non-added file"
-# CHECK-NEXT:  },
-# CHECK-NEXT:  "id": 5,
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":6,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0","method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","id":2,"method":"textDocument/codeAction","params":{"textDocument":{"uri":"file:///foo.c"},"range":{"start":{"line":104,"character":13},"end":{"line":0,"character":35}},"context":{"diagnostics":[{"range":{"start": {"line": 0, "character": 32}, "end": {"line": 0, "character": 37}},"severity":2,"message":"using the result of an assignment as a condition without parentheses"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"place parentheses around the assignment to silence this warning"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"use '==' to turn this assignment into an equality comparison"}]}}}
+#      CHECK:  "error": {
+# CHECK-NEXT:    "code": -32602
+# CHECK-NEXT:    "message": "onCodeAction called for non-added file"
+# CHECK-NEXT:  },
+# CHECK-NEXT:  "id": 2,
+---
+{"jsonrpc":"2.0","id":3,"method":"textDocument/rangeFormatting","params":{"textDocument":{"uri":"file:///foo.c"},"range":{"start":{"line":1,"character":4},"end":{"line":1,"character":12}},"options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "error": {
+# CHECK-NEXT:    "code": -32602
+# CHECK-NEXT:    "message": "onDocumentRangeFormatting called for non-added file"
+# CHECK-NEXT:  },
+# CHECK-NEXT:  "id": 3,
+---
+{"jsonrpc":"2.0","id":4,"method":"textDocument/formatting","params":{"textDocument":{"uri":"file:///foo.c"},"options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "error": {
+# CHECK-NEXT:    "code": -32602
+# CHECK-NEXT:    "message": "onDocumentFormatting called for non-added file"
+# CHECK-NEXT:  },
+# CHECK-NEXT:  "id": 4,
+---
+{"jsonrpc":"2.0","id":5,"method":"textDocument/onTypeFormatting","params":{"textDocument":{"uri":"file:///foo.c"},"position":{"line":3,"character":1},"ch":"}","options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "error": {
+# CHECK-NEXT:    "code": -32602
+# CHECK-NEXT:    "message": "onDocumentOnTypeFormatting called for non-added file"
+# CHECK-NEXT:  },
+# CHECK-NEXT:  "id": 5,
+---
+{"jsonrpc":"2.0","id":6,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}

test/clangd/diagnostics.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 152
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
-#      CHECK:  "method": "textDocument/publishDiagnostics",
-# CHECK-NEXT:  "params": {
-# CHECK-NEXT:    "diagnostics": [
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "return type of 'main' is not 'int'",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 4,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 0,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 2
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "change return type to 'int'",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 4,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 0,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      }
-# CHECK-NEXT:    ],
-# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
-# CHECK-NEXT:  }
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":5,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0","method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
+#      CHECK:  "method": "textDocument/publishDiagnostics",
+# CHECK-NEXT:  "params": {
+# CHECK-NEXT:    "diagnostics": [
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "return type of 'main' is not 'int'",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 4,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 0,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 2
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "change return type to 'int'",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 4,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 0,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      }
+# CHECK-NEXT:    ],
+# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":5,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}

test/clangd/execute-command.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 180
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int main(int i, char **a) { if (i = 2) {}}"}}}
-#      CHECK:  "method": "textDocument/publishDiagnostics",
-# CHECK-NEXT:  "params": {
-# CHECK-NEXT:    "diagnostics": [
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "using the result of an assignment as a condition without parentheses",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 37,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 32,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 2
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "place parentheses around the assignment to silence this warning",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 35,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 34,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "use '==' to turn this assignment into an equality comparison",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 35,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 34,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      }
-# CHECK-NEXT:    ],
-# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
-# CHECK-NEXT:  }
-Content-Length: 72
-
-{"jsonrpc":"2.0","id":3,"method":"workspace/executeCommand","params":{}}
-# No command name
-Content-Length: 85
-
-{"jsonrpc":"2.0","id":4,"method":"workspace/executeCommand","params":{"command": {}}}
-# Invalid, non-scalar command name
-Content-Length: 345
-
-{"jsonrpc":"2.0","id":5,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","custom":"foo", "arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}]}}
-Content-Length: 117
-
-{"jsonrpc":"2.0","id":6,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":"foo"}}
-# Arguments not a sequence.
-Content-Length: 93
-
-{"jsonrpc":"2.0","id":7,"method":"workspace/executeCommand","params":{"command":"mycommand"}}
-# Unknown command.
-Content-Length: 132
-
-{"jsonrpc":"2.0","id":8,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","custom":"foo", "arguments":[""]}}
-# ApplyFix argument not a mapping node.
-Content-Length: 345
-
-{"jsonrpc":"2.0","id":9,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"custom":"foo", "changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}]}}
-# Custom field in WorkspaceEdit
-Content-Length: 132
-
-{"jsonrpc":"2.0","id":10,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":"foo"}]}}
-# changes in WorkspaceEdit with no mapping node
-Content-Length: 346
-
-{"jsonrpc":"2.0","id":11,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}], "custom":"foo"}}]}}
-# Custom field in WorkspaceEditChange
-Content-Length: 150
-
-{"jsonrpc":"2.0","id":12,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":"bar"}}]}}
-# No sequence node for TextEdits
-Content-Length: 149
-
-{"jsonrpc":"2.0","id":13,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[""]}}]}}
-# No mapping node for TextEdit
-Content-Length: 265
-
-{"jsonrpc":"2.0","id":14,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":"","newText":")"}]}}]}}
-# TextEdit not decoded
-Content-Length: 345
-
-{"jsonrpc":"2.0","id":9,"method":"workspace/executeCommand","params":{"arguments":[{"custom":"foo", "changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}],"command":"clangd.applyFix"}}
-# Command name after arguments
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int main(int i, char **a) { if (i = 2) {}}"}}}
+#      CHECK:  "method": "textDocument/publishDiagnostics",
+# CHECK-NEXT:  "params": {
+# CHECK-NEXT:    "diagnostics": [
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "using the result of an assignment as a condition without parentheses",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 37,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 32,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 2
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "place parentheses around the assignment to silence this warning",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 35,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 34,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "use '==' to turn this assignment into an equality comparison",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 35,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 34,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      }
+# CHECK-NEXT:    ],
+# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
+# CHECK-NEXT:  }
+---
+# No command name
+{"jsonrpc":"2.0","id":3,"method":"workspace/executeCommand","params":{}}
+---
+# Invalid, non-scalar command name
+{"jsonrpc":"2.0","id":4,"method":"workspace/executeCommand","params":{"command": {}}}
+---
+{"jsonrpc":"2.0","id":5,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","custom":"foo", "arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}]}}
+---
+# Arguments not a sequence.
+{"jsonrpc":"2.0","id":6,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":"foo"}}
+---
+# Unknown command.
+{"jsonrpc":"2.0","id":7,"method":"workspace/executeCommand","params":{"command":"mycommand"}}
+---
+# ApplyFix argument not a mapping node.
+{"jsonrpc":"2.0","id":8,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","custom":"foo", "arguments":[""]}}
+---
+# Custom field in WorkspaceEdit
+{"jsonrpc":"2.0","id":9,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"custom":"foo", "changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}]}}
+---
+# changes in WorkspaceEdit with no mapping node
+{"jsonrpc":"2.0","id":10,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":"foo"}]}}
+---
+# Custom field in WorkspaceEditChange
+{"jsonrpc":"2.0","id":11,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}], "custom":"foo"}}]}}
+---
+# No sequence node for TextEdits
+{"jsonrpc":"2.0","id":12,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":"bar"}}]}}
+---
+# No mapping node for TextEdit
+{"jsonrpc":"2.0","id":13,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[""]}}]}}
+---
+# TextEdit not decoded
+{"jsonrpc":"2.0","id":14,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":"","newText":")"}]}}]}}
+---
+# Command name after arguments
+{"jsonrpc":"2.0","id":9,"method":"workspace/executeCommand","params":{"arguments":[{"custom":"foo", "changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}],"command":"clangd.applyFix"}}
+---
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}

test/clangd/extra-flags.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 205
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int main() { int i; return i; }"},"metadata":{"extraFlags":["-Wall"]}}}
-#      CHECK:  "method": "textDocument/publishDiagnostics",
-# CHECK-NEXT:  "params": {
-# CHECK-NEXT:    "diagnostics": [
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "variable 'i' is uninitialized when used here",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 28,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 27,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 2
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "initialize the variable 'i' to silence this warning",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 19,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 18,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      }
-# CHECK-NEXT:    ],
-# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
-# CHECK-NEXT:  }
-Content-Length: 175
-
-{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":2},"contentChanges":[{"text":"int main() { int i; return i; }"}]}}
-#      CHECK:  "method": "textDocument/publishDiagnostics",
-# CHECK-NEXT:  "params": {
-# CHECK-NEXT:    "diagnostics": [
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "variable 'i' is uninitialized when used here",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 28,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 27,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 2
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "initialize the variable 'i' to silence this warning",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 19,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 18,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      }
-# CHECK-NEXT:    ],
-# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
-# CHECK-NEXT:  }
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":5,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
-
-
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int main() { int i; return i; }"},"metadata":{"extraFlags":["-Wall"]}}}
+#      CHECK:  "method": "textDocument/publishDiagnostics",
+# CHECK-NEXT:  "params": {
+# CHECK-NEXT:    "diagnostics": [
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "variable 'i' is uninitialized when used here",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 28,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 27,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 2
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "initialize the variable 'i' to silence this warning",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 19,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 18,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      }
+# CHECK-NEXT:    ],
+# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":2},"contentChanges":[{"text":"int main() { int i; return i; }"}]}}
+#      CHECK:  "method": "textDocument/publishDiagnostics",
+# CHECK-NEXT:  "params": {
+# CHECK-NEXT:    "diagnostics": [
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "variable 'i' is uninitialized when used here",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 28,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 27,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 2
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "initialize the variable 'i' to silence this warning",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 19,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 18,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      }
+# CHECK-NEXT:    ],
+# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":5,"method":"shutdown"}
+---
+{"jsonrpc":"2.0":"method":"exit"}
+
+

test/clangd/fixits.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 180
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int main(int i, char **a) { if (i = 2) {}}"}}}
-#      CHECK:    "method": "textDocument/publishDiagnostics",
-# CHECK-NEXT:  "params": {
-# CHECK-NEXT:    "diagnostics": [
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "using the result of an assignment as a condition without parentheses",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 37,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 32,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 2
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "place parentheses around the assignment to silence this warning",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 35,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 34,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      },
-# CHECK-NEXT:      {
-# CHECK-NEXT:        "message": "use '==' to turn this assignment into an equality comparison",
-# CHECK-NEXT:        "range": {
-# CHECK-NEXT:          "end": {
-# CHECK-NEXT:            "character": 35,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          },
-# CHECK-NEXT:          "start": {
-# CHECK-NEXT:            "character": 34,
-# CHECK-NEXT:            "line": 0
-# CHECK-NEXT:          }
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "severity": 3
-# CHECK-NEXT:      }
-# CHECK-NEXT:    ],
-# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
-# CHECK-NEXT:  }
-Content-Length: 746
-
-{"jsonrpc":"2.0","id":2,"method":"textDocument/codeAction","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":104,"character":13},"end":{"line":0,"character":35}},"context":{"diagnostics":[{"range":{"start": {"line": 0, "character": 32}, "end": {"line": 0, "character": 37}},"severity":2,"message":"using the result of an assignment as a condition without parentheses"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"place parentheses around the assignment to silence this warning"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"use '==' to turn this assignment into an equality comparison"}]}}}
-#      CHECK:  "id": 2,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "arguments": [
-# CHECK-NEXT:        {
-# CHECK-NEXT:          "changes": {
-# CHECK-NEXT:            "file://{{.*}}/foo.c": [
-# CHECK-NEXT:              {
-# CHECK-NEXT:                "newText": "(",
-# CHECK-NEXT:                "range": {
-# CHECK-NEXT:                  "end": {
-# CHECK-NEXT:                    "character": 32,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  },
-# CHECK-NEXT:                  "start": {
-# CHECK-NEXT:                    "character": 32,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  }
-# CHECK-NEXT:                }
-# CHECK-NEXT:              },
-# CHECK-NEXT:              {
-# CHECK-NEXT:                "newText": ")",
-# CHECK-NEXT:                "range": {
-# CHECK-NEXT:                  "end": {
-# CHECK-NEXT:                    "character": 37,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  },
-# CHECK-NEXT:                  "start": {
-# CHECK-NEXT:                    "character": 37,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  }
-# CHECK-NEXT:                }
-# CHECK-NEXT:              }
-# CHECK-NEXT:            ]
-# CHECK-NEXT:          }
-# CHECK-NEXT:        }
-# CHECK-NEXT:      ],
-# CHECK-NEXT:      "command": "clangd.applyFix",
-# CHECK-NEXT:      "title": "Apply FixIt place parentheses around the assignment to silence this warning"
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "arguments": [
-# CHECK-NEXT:        {
-# CHECK-NEXT:          "changes": {
-# CHECK-NEXT:            "file://{{.*}}/foo.c": [
-# CHECK-NEXT:              {
-# CHECK-NEXT:                "newText": "==",
-# CHECK-NEXT:                "range": {
-# CHECK-NEXT:                  "end": {
-# CHECK-NEXT:                    "character": 35,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  },
-# CHECK-NEXT:                  "start": {
-# CHECK-NEXT:                    "character": 34,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  }
-# CHECK-NEXT:                }
-# CHECK-NEXT:              }
-# CHECK-NEXT:            ]
-# CHECK-NEXT:          }
-# CHECK-NEXT:        }
-# CHECK-NEXT:      ],
-# CHECK-NEXT:      "command": "clangd.applyFix",
-# CHECK-NEXT:      "title": "Apply FixIt use '==' to turn this assignment into an equality comparison"
-# CHECK-NEXT:    }
-# CHECK-NEXT:  ]
-Content-Length: 771
-
-{"jsonrpc":"2.0","id":3,"method":"textDocument/codeAction","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":104,"character":13},"end":{"line":0,"character":35}},"context":{"diagnostics":[{"range":{"start": {"line": 0, "character": 32}, "end": {"line": 0, "character": 37}},"severity":2,"code":"1","source":"foo","message":"using the result of an assignment as a condition without parentheses"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"place parentheses around the assignment to silence this warning"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"use '==' to turn this assignment into an equality comparison"}]}}}
-# Make sure unused "code" and "source" fields ignored gracefully
-#      CHECK:  "id": 3,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "arguments": [
-# CHECK-NEXT:        {
-# CHECK-NEXT:          "changes": {
-# CHECK-NEXT:            "file://{{.*}}/foo.c": [
-# CHECK-NEXT:              {
-# CHECK-NEXT:                "newText": "(",
-# CHECK-NEXT:                "range": {
-# CHECK-NEXT:                  "end": {
-# CHECK-NEXT:                    "character": 32,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  },
-# CHECK-NEXT:                  "start": {
-# CHECK-NEXT:                    "character": 32,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  }
-# CHECK-NEXT:                }
-# CHECK-NEXT:              },
-# CHECK-NEXT:              {
-# CHECK-NEXT:                "newText": ")",
-# CHECK-NEXT:                "range": {
-# CHECK-NEXT:                  "end": {
-# CHECK-NEXT:                    "character": 37,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  },
-# CHECK-NEXT:                  "start": {
-# CHECK-NEXT:                    "character": 37,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  }
-# CHECK-NEXT:                }
-# CHECK-NEXT:              }
-# CHECK-NEXT:            ]
-# CHECK-NEXT:          }
-# CHECK-NEXT:        }
-# CHECK-NEXT:      ],
-# CHECK-NEXT:      "command": "clangd.applyFix",
-# CHECK-NEXT:      "title": "Apply FixIt place parentheses around the assignment to silence this warning"
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "arguments": [
-# CHECK-NEXT:        {
-# CHECK-NEXT:          "changes": {
-# CHECK-NEXT:            "file://{{.*}}/foo.c": [
-# CHECK-NEXT:              {
-# CHECK-NEXT:                "newText": "==",
-# CHECK-NEXT:                "range": {
-# CHECK-NEXT:                  "end": {
-# CHECK-NEXT:                    "character": 35,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  },
-# CHECK-NEXT:                  "start": {
-# CHECK-NEXT:                    "character": 34,
-# CHECK-NEXT:                    "line": 0
-# CHECK-NEXT:                  }
-# CHECK-NEXT:                }
-# CHECK-NEXT:              }
-# CHECK-NEXT:            ]
-# CHECK-NEXT:          }
-# CHECK-NEXT:        }
-# CHECK-NEXT:      ],
-# CHECK-NEXT:      "command": "clangd.applyFix",
-# CHECK-NEXT:      "title": "Apply FixIt use '==' to turn this assignment into an equality comparison"
-# CHECK-NEXT:    }
-# CHECK-NEXT:  ]
-Content-Length: 329
-
-{"jsonrpc":"2.0","id":4,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}]}}
-#      CHECK:  "id": 4,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": "Fix applied."
-#
-#      CHECK:  "id": 1,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "method": "workspace/applyEdit",
-# CHECK-NEXT:  "params": {
-# CHECK-NEXT:    "edit": {
-# CHECK-NEXT:      "changes": {
-# CHECK-NEXT:        "{{.*}}/foo.c": [
-# CHECK-NEXT:          {
-# CHECK-NEXT:            "newText": "(",
-# CHECK-NEXT:            "range": {
-# CHECK-NEXT:              "end": {
-# CHECK-NEXT:                "character": 32,
-# CHECK-NEXT:                "line": 0
-# CHECK-NEXT:              },
-# CHECK-NEXT:              "start": {
-# CHECK-NEXT:                "character": 32,
-# CHECK-NEXT:                "line": 0
-# CHECK-NEXT:              }
-# CHECK-NEXT:            }
-# CHECK-NEXT:          },
-# CHECK-NEXT:          {
-# CHECK-NEXT:            "newText": ")",
-# CHECK-NEXT:            "range": {
-# CHECK-NEXT:              "end": {
-# CHECK-NEXT:                "character": 37,
-# CHECK-NEXT:                "line": 0
-# CHECK-NEXT:              },
-# CHECK-NEXT:              "start": {
-# CHECK-NEXT:                "character": 37,
-# CHECK-NEXT:                "line": 0
-# CHECK-NEXT:              }
-# CHECK-NEXT:            }
-# CHECK-NEXT:          }
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      }
-# CHECK-NEXT:    }
-# CHECK-NEXT:  }
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":4,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0","method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int main(int i, char **a) { if (i = 2) {}}"}}}
+#      CHECK:    "method": "textDocument/publishDiagnostics",
+# CHECK-NEXT:  "params": {
+# CHECK-NEXT:    "diagnostics": [
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "using the result of an assignment as a condition without parentheses",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 37,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 32,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 2
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "place parentheses around the assignment to silence this warning",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 35,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 34,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      },
+# CHECK-NEXT:      {
+# CHECK-NEXT:        "message": "use '==' to turn this assignment into an equality comparison",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": 35,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": 34,
+# CHECK-NEXT:            "line": 0
+# CHECK-NEXT:          }
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "severity": 3
+# CHECK-NEXT:      }
+# CHECK-NEXT:    ],
+# CHECK-NEXT:    "uri": "file://{{.*}}/foo.c"
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":2,"method":"textDocument/codeAction","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":104,"character":13},"end":{"line":0,"character":35}},"context":{"diagnostics":[{"range":{"start": {"line": 0, "character": 32}, "end": {"line": 0, "character": 37}},"severity":2,"message":"using the result of an assignment as a condition without parentheses"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"place parentheses around the assignment to silence this warning"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"use '==' to turn this assignment into an equality comparison"}]}}}
+#      CHECK:  "id": 2,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "arguments": [
+# CHECK-NEXT:        {
+# CHECK-NEXT:          "changes": {
+# CHECK-NEXT:            "file://{{.*}}/foo.c": [
+# CHECK-NEXT:              {
+# CHECK-NEXT:                "newText": "(",
+# CHECK-NEXT:                "range": {
+# CHECK-NEXT:                  "end": {
+# CHECK-NEXT:                    "character": 32,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  },
+# CHECK-NEXT:                  "start": {
+# CHECK-NEXT:                    "character": 32,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  }
+# CHECK-NEXT:                }
+# CHECK-NEXT:              },
+# CHECK-NEXT:              {
+# CHECK-NEXT:                "newText": ")",
+# CHECK-NEXT:                "range": {
+# CHECK-NEXT:                  "end": {
+# CHECK-NEXT:                    "character": 37,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  },
+# CHECK-NEXT:                  "start": {
+# CHECK-NEXT:                    "character": 37,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  }
+# CHECK-NEXT:                }
+# CHECK-NEXT:              }
+# CHECK-NEXT:            ]
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
+# CHECK-NEXT:      ],
+# CHECK-NEXT:      "command": "clangd.applyFix",
+# CHECK-NEXT:      "title": "Apply FixIt place parentheses around the assignment to silence this warning"
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "arguments": [
+# CHECK-NEXT:        {
+# CHECK-NEXT:          "changes": {
+# CHECK-NEXT:            "file://{{.*}}/foo.c": [
+# CHECK-NEXT:              {
+# CHECK-NEXT:                "newText": "==",
+# CHECK-NEXT:                "range": {
+# CHECK-NEXT:                  "end": {
+# CHECK-NEXT:                    "character": 35,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  },
+# CHECK-NEXT:                  "start": {
+# CHECK-NEXT:                    "character": 34,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  }
+# CHECK-NEXT:                }
+# CHECK-NEXT:              }
+# CHECK-NEXT:            ]
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
+# CHECK-NEXT:      ],
+# CHECK-NEXT:      "command": "clangd.applyFix",
+# CHECK-NEXT:      "title": "Apply FixIt use '==' to turn this assignment into an equality comparison"
+# CHECK-NEXT:    }
+# CHECK-NEXT:  ]
+---
+{"jsonrpc":"2.0","id":3,"method":"textDocument/codeAction","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":104,"character":13},"end":{"line":0,"character":35}},"context":{"diagnostics":[{"range":{"start": {"line": 0, "character": 32}, "end": {"line": 0, "character": 37}},"severity":2,"code":"1","source":"foo","message":"using the result of an assignment as a condition without parentheses"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"place parentheses around the assignment to silence this warning"},{"range":{"start": {"line": 0, "character": 34}, "end": {"line": 0, "character": 35}},"severity":3,"message":"use '==' to turn this assignment into an equality comparison"}]}}}
+# Make sure unused "code" and "source" fields ignored gracefully
+#      CHECK:  "id": 3,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "arguments": [
+# CHECK-NEXT:        {
+# CHECK-NEXT:          "changes": {
+# CHECK-NEXT:            "file://{{.*}}/foo.c": [
+# CHECK-NEXT:              {
+# CHECK-NEXT:                "newText": "(",
+# CHECK-NEXT:                "range": {
+# CHECK-NEXT:                  "end": {
+# CHECK-NEXT:                    "character": 32,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  },
+# CHECK-NEXT:                  "start": {
+# CHECK-NEXT:                    "character": 32,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  }
+# CHECK-NEXT:                }
+# CHECK-NEXT:              },
+# CHECK-NEXT:              {
+# CHECK-NEXT:                "newText": ")",
+# CHECK-NEXT:                "range": {
+# CHECK-NEXT:                  "end": {
+# CHECK-NEXT:                    "character": 37,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  },
+# CHECK-NEXT:                  "start": {
+# CHECK-NEXT:                    "character": 37,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  }
+# CHECK-NEXT:                }
+# CHECK-NEXT:              }
+# CHECK-NEXT:            ]
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
+# CHECK-NEXT:      ],
+# CHECK-NEXT:      "command": "clangd.applyFix",
+# CHECK-NEXT:      "title": "Apply FixIt place parentheses around the assignment to silence this warning"
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "arguments": [
+# CHECK-NEXT:        {
+# CHECK-NEXT:          "changes": {
+# CHECK-NEXT:            "file://{{.*}}/foo.c": [
+# CHECK-NEXT:              {
+# CHECK-NEXT:                "newText": "==",
+# CHECK-NEXT:                "range": {
+# CHECK-NEXT:                  "end": {
+# CHECK-NEXT:                    "character": 35,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  },
+# CHECK-NEXT:                  "start": {
+# CHECK-NEXT:                    "character": 34,
+# CHECK-NEXT:                    "line": 0
+# CHECK-NEXT:                  }
+# CHECK-NEXT:                }
+# CHECK-NEXT:              }
+# CHECK-NEXT:            ]
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
+# CHECK-NEXT:      ],
+# CHECK-NEXT:      "command": "clangd.applyFix",
+# CHECK-NEXT:      "title": "Apply FixIt use '==' to turn this assignment into an equality comparison"
+# CHECK-NEXT:    }
+# CHECK-NEXT:  ]
+---
+{"jsonrpc":"2.0","id":4,"method":"workspace/executeCommand","params":{"command":"clangd.applyFix","arguments":[{"changes":{"test:///foo.c":[{"range":{"start":{"line":0,"character":32},"end":{"line":0,"character":32}},"newText":"("},{"range":{"start":{"line":0,"character":37},"end":{"line":0,"character":37}},"newText":")"}]}}]}}
+#      CHECK:  "id": 4,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": "Fix applied."
+#
+#      CHECK:  "id": 1,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "method": "workspace/applyEdit",
+# CHECK-NEXT:  "params": {
+# CHECK-NEXT:    "edit": {
+# CHECK-NEXT:      "changes": {
+# CHECK-NEXT:        "{{.*}}/foo.c": [
+# CHECK-NEXT:          {
+# CHECK-NEXT:            "newText": "(",
+# CHECK-NEXT:            "range": {
+# CHECK-NEXT:              "end": {
+# CHECK-NEXT:                "character": 32,
+# CHECK-NEXT:                "line": 0
+# CHECK-NEXT:              },
+# CHECK-NEXT:              "start": {
+# CHECK-NEXT:                "character": 32,
+# CHECK-NEXT:                "line": 0
+# CHECK-NEXT:              }
+# CHECK-NEXT:            }
+# CHECK-NEXT:          },
+# CHECK-NEXT:          {
+# CHECK-NEXT:            "newText": ")",
+# CHECK-NEXT:            "range": {
+# CHECK-NEXT:              "end": {
+# CHECK-NEXT:                "character": 37,
+# CHECK-NEXT:                "line": 0
+# CHECK-NEXT:              },
+# CHECK-NEXT:              "start": {
+# CHECK-NEXT:                "character": 37,
+# CHECK-NEXT:                "line": 0
+# CHECK-NEXT:              }
+# CHECK-NEXT:            }
+# CHECK-NEXT:          }
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      }
+# CHECK-NEXT:    }
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":4,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}

test/clangd/formatting.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-Content-Length: 193
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int foo ( int x ) {\n    x = x+1;\n    return x;\n    }"}}}
-Content-Length: 233
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/rangeFormatting","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":1,"character":4},"end":{"line":1,"character":12}},"options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:   "id": 1,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "\n  ",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 4,
-# CHECK-NEXT:          "line": 1
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 19,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": " ",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 9,
-# CHECK-NEXT:          "line": 1
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 9,
-# CHECK-NEXT:          "line": 1
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": " ",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 10,
-# CHECK-NEXT:          "line": 1
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 10,
-# CHECK-NEXT:          "line": 1
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "\n  ",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 4,
-# CHECK-NEXT:          "line": 2
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 12,
-# CHECK-NEXT:          "line": 1
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    }
-# CHECK-NEXT:  ]
-Content-Length: 197
-
-{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":5},"contentChanges":[{"text":"int foo ( int x ) {\n  x = x + 1;\n  return x;\n    }"}]}}
-#
-#
-Content-Length: 233
-
-{"jsonrpc":"2.0","id":2,"method":"textDocument/rangeFormatting","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":1,"character":2},"end":{"line":1,"character":12}},"options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "id": 2,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": []
-Content-Length: 153
-
-{"jsonrpc":"2.0","id":3,"method":"textDocument/formatting","params":{"textDocument":{"uri":"test:///foo.c"},"options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "id": 3,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 8,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 7,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 10,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 9,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 16,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 15,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "\n",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 4,
-# CHECK-NEXT:          "line": 3
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 11,
-# CHECK-NEXT:          "line": 2
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    }
-# CHECK-NEXT:  ]
-Content-Length: 190
-
-{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":9},"contentChanges":[{"text":"int foo(int x) {\n  x = x + 1;\n  return x;\n}"}]}}
-#
-#
-Content-Length: 153
-
-{"jsonrpc":"2.0","id":4,"method":"textDocument/formatting","params":{"textDocument":{"uri":"test:///foo.c"},"options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "id": 4,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": []
-Content-Length: 193
-
-{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":5},"contentChanges":[{"text":"int foo ( int x ) {\n  x = x + 1;\n  return x;\n}"}]}}
-#
-#
-Content-Length: 204
-
-{"jsonrpc":"2.0","id":5,"method":"textDocument/onTypeFormatting","params":{"textDocument":{"uri":"test:///foo.c"},"position":{"line":3,"character":1},"ch":"}","options":{"tabSize":4,"insertSpaces":true}}}
-#      CHECK:  "id": 5,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 8,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 7,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 10,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 9,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    },
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "newText": "",
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 16,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 15,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      }
-# CHECK-NEXT:    }
-# CHECK-NEXT:  ]
-
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":6,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"int foo ( int x ) {\n    x = x+1;\n    return x;\n    }"}}}
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/rangeFormatting","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":1,"character":4},"end":{"line":1,"character":12}},"options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:   "id": 1,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "\n  ",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 4,
+# CHECK-NEXT:          "line": 1
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 19,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": " ",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 9,
+# CHECK-NEXT:          "line": 1
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 9,
+# CHECK-NEXT:          "line": 1
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": " ",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 10,
+# CHECK-NEXT:          "line": 1
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 10,
+# CHECK-NEXT:          "line": 1
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "\n  ",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 4,
+# CHECK-NEXT:          "line": 2
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 12,
+# CHECK-NEXT:          "line": 1
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    }
+# CHECK-NEXT:  ]
+---
+{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":5},"contentChanges":[{"text":"int foo ( int x ) {\n  x = x + 1;\n  return x;\n    }"}]}}
+#
+#
+---
+{"jsonrpc":"2.0","id":2,"method":"textDocument/rangeFormatting","params":{"textDocument":{"uri":"test:///foo.c"},"range":{"start":{"line":1,"character":2},"end":{"line":1,"character":12}},"options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "id": 2,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": []
+---
+{"jsonrpc":"2.0","id":3,"method":"textDocument/formatting","params":{"textDocument":{"uri":"test:///foo.c"},"options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "id": 3,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 8,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 7,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 10,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 9,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 16,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 15,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "\n",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 4,
+# CHECK-NEXT:          "line": 3
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 11,
+# CHECK-NEXT:          "line": 2
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    }
+# CHECK-NEXT:  ]
+---
+{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":9},"contentChanges":[{"text":"int foo(int x) {\n  x = x + 1;\n  return x;\n}"}]}}
+---
+{"jsonrpc":"2.0","id":4,"method":"textDocument/formatting","params":{"textDocument":{"uri":"test:///foo.c"},"options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "id": 4,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": []
+---
+{"jsonrpc":"2.0","method":"textDocument/didChange","params":{"textDocument":{"uri":"test:///foo.c","version":5},"contentChanges":[{"text":"int foo ( int x ) {\n  x = x + 1;\n  return x;\n}"}]}}
+---
+{"jsonrpc":"2.0","id":5,"method":"textDocument/onTypeFormatting","params":{"textDocument":{"uri":"test:///foo.c"},"position":{"line":3,"character":1},"ch":"}","options":{"tabSize":4,"insertSpaces":true}}}
+#      CHECK:  "id": 5,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 8,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 7,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 10,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 9,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    },
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "newText": "",
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 16,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 15,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      }
+# CHECK-NEXT:    }
+# CHECK-NEXT:  ]
+---
+{"jsonrpc":"2.0","id":6,"method":"shutdown"}
+---
+{"jsonrpc":"2.0":"method":"exit"}

test/clangd/initialize-params-invalid.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-# Test with invalid initialize request parameters
-Content-Length: 142
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":"","rootUri":"file:///path/to/workspace","capabilities":{},"trace":"off"}}
-#      CHECK:  "id": 0,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": {
-# CHECK-NEXT:    "capabilities": {
-# CHECK-NEXT:      "codeActionProvider": true,
-# CHECK-NEXT:      "completionProvider": {
-# CHECK-NEXT:        "resolveProvider": false,
-# CHECK-NEXT:        "triggerCharacters": [
-# CHECK-NEXT:          ".",
-# CHECK-NEXT:          ">",
-# CHECK-NEXT:          ":"
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "definitionProvider": true,
-# CHECK-NEXT:      "documentFormattingProvider": true,
-# CHECK-NEXT:      "documentHighlightProvider": true,
-# CHECK-NEXT:      "documentOnTypeFormattingProvider": {
-# CHECK-NEXT:        "firstTriggerCharacter": "}",
-# CHECK-NEXT:        "moreTriggerCharacter": []
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "documentRangeFormattingProvider": true,
-# CHECK-NEXT:      "executeCommandProvider": {
-# CHECK-NEXT:        "commands": [
-# CHECK-NEXT:          "clangd.applyFix"
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "renameProvider": true,
-# CHECK-NEXT:      "signatureHelpProvider": {
-# CHECK-NEXT:        "triggerCharacters": [
-# CHECK-NEXT:          "(",
-# CHECK-NEXT:          ","
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "textDocumentSync": 1
-# CHECK-NEXT:    }
-# CHECK-NEXT:  }
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":3,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0","method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+# Test with invalid initialize request parameters
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":"","rootUri":"file:///path/to/workspace","capabilities":{},"trace":"off"}}
+#      CHECK:  "id": 0,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": {
+# CHECK-NEXT:    "capabilities": {
+# CHECK-NEXT:      "codeActionProvider": true,
+# CHECK-NEXT:      "completionProvider": {
+# CHECK-NEXT:        "resolveProvider": false,
+# CHECK-NEXT:        "triggerCharacters": [
+# CHECK-NEXT:          ".",
+# CHECK-NEXT:          ">",
+# CHECK-NEXT:          ":"
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "definitionProvider": true,
+# CHECK-NEXT:      "documentFormattingProvider": true,
+# CHECK-NEXT:      "documentHighlightProvider": true,
+# CHECK-NEXT:      "documentOnTypeFormattingProvider": {
+# CHECK-NEXT:        "firstTriggerCharacter": "}",
+# CHECK-NEXT:        "moreTriggerCharacter": []
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "documentRangeFormattingProvider": true,
+# CHECK-NEXT:      "executeCommandProvider": {
+# CHECK-NEXT:        "commands": [
+# CHECK-NEXT:          "clangd.applyFix"
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "renameProvider": true,
+# CHECK-NEXT:      "signatureHelpProvider": {
+# CHECK-NEXT:        "triggerCharacters": [
+# CHECK-NEXT:          "(",
+# CHECK-NEXT:          ","
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "textDocumentSync": 1
+# CHECK-NEXT:    }
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}

test/clangd/initialize-params.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-# Test initialize request parameters with rootUri
-Content-Length: 143
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootUri":"file:///path/to/workspace","capabilities":{},"trace":"off"}}
-#      CHECK:  "id": 0,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": {
-# CHECK-NEXT:    "capabilities": {
-# CHECK-NEXT:      "codeActionProvider": true,
-# CHECK-NEXT:      "completionProvider": {
-# CHECK-NEXT:        "resolveProvider": false,
-# CHECK-NEXT:        "triggerCharacters": [
-# CHECK-NEXT:          ".",
-# CHECK-NEXT:          ">",
-# CHECK-NEXT:          ":"
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "definitionProvider": true,
-# CHECK-NEXT:      "documentFormattingProvider": true,
-# CHECK-NEXT:      "documentHighlightProvider": true,
-# CHECK-NEXT:      "documentOnTypeFormattingProvider": {
-# CHECK-NEXT:        "firstTriggerCharacter": "}",
-# CHECK-NEXT:        "moreTriggerCharacter": []
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "documentRangeFormattingProvider": true,
-# CHECK-NEXT:      "executeCommandProvider": {
-# CHECK-NEXT:        "commands": [
-# CHECK-NEXT:          "clangd.applyFix"
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "renameProvider": true,
-# CHECK-NEXT:      "signatureHelpProvider": {
-# CHECK-NEXT:        "triggerCharacters": [
-# CHECK-NEXT:          "(",
-# CHECK-NEXT:          ","
-# CHECK-NEXT:        ]
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "textDocumentSync": 1
-# CHECK-NEXT:    }
-# CHECK-NEXT:  }
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":3,"method":"shutdown"}
-#      CHECK:  "id": 3,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": null
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+# Test initialize request parameters with rootUri
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootUri":"file:///path/to/workspace","capabilities":{},"trace":"off"}}
+#      CHECK:  "id": 0,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": {
+# CHECK-NEXT:    "capabilities": {
+# CHECK-NEXT:      "codeActionProvider": true,
+# CHECK-NEXT:      "completionProvider": {
+# CHECK-NEXT:        "resolveProvider": false,
+# CHECK-NEXT:        "triggerCharacters": [
+# CHECK-NEXT:          ".",
+# CHECK-NEXT:          ">",
+# CHECK-NEXT:          ":"
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "definitionProvider": true,
+# CHECK-NEXT:      "documentFormattingProvider": true,
+# CHECK-NEXT:      "documentHighlightProvider": true,
+# CHECK-NEXT:      "documentOnTypeFormattingProvider": {
+# CHECK-NEXT:        "firstTriggerCharacter": "}",
+# CHECK-NEXT:        "moreTriggerCharacter": []
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "documentRangeFormattingProvider": true,
+# CHECK-NEXT:      "executeCommandProvider": {
+# CHECK-NEXT:        "commands": [
+# CHECK-NEXT:          "clangd.applyFix"
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "renameProvider": true,
+# CHECK-NEXT:      "signatureHelpProvider": {
+# CHECK-NEXT:        "triggerCharacters": [
+# CHECK-NEXT:          "(",
+# CHECK-NEXT:          ","
+# CHECK-NEXT:        ]
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "textDocumentSync": 1
+# CHECK-NEXT:    }
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+#      CHECK:  "id": 3,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": null
+---
+{"jsonrpc":"2.0":"method":"exit"}

test/clangd/rename.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-
-Content-Length: 150
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.cpp","languageId":"cpp","version":1,"text":"int foo;"}}}
-
-Content-Length: 159
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/rename","params":{"textDocument":{"uri":"test:///foo.cpp"},"position":{"line":0,"character":5},"newName":"bar"}}
-#      CHECK:  "id": 1,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": {
-# CHECK-NEXT:    "changes": {
-# CHECK-NEXT:      "file://{{.*}}/foo.cpp": [
-# CHECK-NEXT:        {
-# CHECK-NEXT:          "newText": "bar",
-# CHECK-NEXT:          "range": {
-# CHECK-NEXT:            "end": {
-# CHECK-NEXT:              "character": 7
-# CHECK-NEXT:              "line": 0
-# CHECK-NEXT:            },
-# CHECK-NEXT:            "start": {
-# CHECK-NEXT:              "character": 4
-# CHECK-NEXT:              "line": 0
-# CHECK-NEXT:            }
-# CHECK-NEXT:          }
-# CHECK-NEXT:        }
-# CHECK-NEXT:      ]
-# CHECK-NEXT:    }
-# CHECK-NEXT:  }
-Content-Length: 159
-
-{"jsonrpc":"2.0","id":2,"method":"textDocument/rename","params":{"textDocument":{"uri":"test:///foo.cpp"},"position":{"line":0,"character":2},"newName":"bar"}}
-#      CHECK:  "error": {
-# CHECK-NEXT:    "code": -32603,
-# CHECK-NEXT:    "message": "clang diagnostic"
-# CHECK-NEXT:  },
-# CHECK-NEXT:  "id": 2,
-# CHECK-NEXT:  "jsonrpc": "2.0"
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":3,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.cpp","languageId":"cpp","version":1,"text":"int foo;"}}}
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/rename","params":{"textDocument":{"uri":"test:///foo.cpp"},"position":{"line":0,"character":5},"newName":"bar"}}
+#      CHECK:  "id": 1,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": {
+# CHECK-NEXT:    "changes": {
+# CHECK-NEXT:      "file://{{.*}}/foo.cpp": [
+# CHECK-NEXT:        {
+# CHECK-NEXT:          "newText": "bar",
+# CHECK-NEXT:          "range": {
+# CHECK-NEXT:            "end": {
+# CHECK-NEXT:              "character": 7
+# CHECK-NEXT:              "line": 0
+# CHECK-NEXT:            },
+# CHECK-NEXT:            "start": {
+# CHECK-NEXT:              "character": 4
+# CHECK-NEXT:              "line": 0
+# CHECK-NEXT:            }
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
+# CHECK-NEXT:      ]
+# CHECK-NEXT:    }
+# CHECK-NEXT:  }
+---
+{"jsonrpc":"2.0","id":2,"method":"textDocument/rename","params":{"textDocument":{"uri":"test:///foo.cpp"},"position":{"line":0,"character":2},"newName":"bar"}}
+#      CHECK:  "error": {
+# CHECK-NEXT:    "code": -32603,
+# CHECK-NEXT:    "message": "clang diagnostic"
+# CHECK-NEXT:  },
+# CHECK-NEXT:  "id": 2,
+# CHECK-NEXT:  "jsonrpc": "2.0"
+---
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+---
+{"jsonrpc":"2.0":"method":"exit"}

test/clangd/shutdown-with-exit.test

-# RUN: clangd -run-synchronously < %s
-# vim: fileformat=dos
-# It is absolutely vital that this file has CRLF line endings.
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":3,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
+# RUN: clangd -lit-test < %s
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+---
+{"jsonrpc":"2.0":"method":"exit"}

test/clangd/shutdown-without-exit.test

-# RUN: not clangd -run-synchronously < %s
-# vim: fileformat=dos
-# It is absolutely vital that this file has CRLF line endings.
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
+# RUN: not clangd -lit-test < %s
+{"jsonrpc":"2.0":"method":"exit"}

test/clangd/signature-help.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-
-# Start a session.
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-
-Content-Length: 172
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"void x(int);\nint main(){\nx("}}}
-
-Content-Length: 151
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/signatureHelp","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":2,"character":2}}}
-#      CHECK: "id": 1,
-# CHECK-NEXT: "jsonrpc": "2.0",
-# CHECK-NEXT: "result": {
-# CHECK-NEXT:   "activeParameter": 0,
-# CHECK-NEXT:   "activeSignature": 0,
-# CHECK-NEXT:   "signatures": [
-# CHECK-NEXT:     {
-# CHECK-NEXT:       "label": "x(int) -> void",
-# CHECK-NEXT:       "parameters": [
-# CHECK-NEXT:         {
-# CHECK-NEXT:           "label": "int"
-# CHECK-NEXT:         }
-# CHECK-NEXT:       ]
-# CHECK-NEXT:     }
-# CHECK-NEXT:   ]
-# CHECK-NEXT: }
-
-# Shutdown.
-Content-Length: 49
-
-{"jsonrpc":"2.0","id":100000,"method":"shutdown"}
-Content-Length: 33
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+# Start a session.
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"void x(int);\nint main(){\nx("}}}
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/signatureHelp","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":2,"character":2}}}
+#      CHECK: "id": 1,
+# CHECK-NEXT: "jsonrpc": "2.0",
+# CHECK-NEXT: "result": {
+# CHECK-NEXT:   "activeParameter": 0,
+# CHECK-NEXT:   "activeSignature": 0,
+# CHECK-NEXT:   "signatures": [
+# CHECK-NEXT:     {
+# CHECK-NEXT:       "label": "x(int) -> void",
+# CHECK-NEXT:       "parameters": [
+# CHECK-NEXT:         {
+# CHECK-NEXT:           "label": "int"
+# CHECK-NEXT:         }
+# CHECK-NEXT:       ]
+# CHECK-NEXT:     }
+# CHECK-NEXT:   ]
+# CHECK-NEXT: }
+---
+{"jsonrpc":"2.0","id":100000,"method":"shutdown"}

test/clangd/test-uri-posix.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# UNSUPPORTED: mingw32,win32
-# It is absolutely vital that this file has CRLF line endings.
-#
-# Test authority-less URI
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 152
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
-# CHECK:    "uri": "file:///clangd-test/foo.c"
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":5,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0","method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+# UNSUPPORTED: mingw32,win32
+# Test authority-less URI
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
+# CHECK:    "uri": "file:///clangd-test/foo.c"
+---
+{"jsonrpc":"2.0","id":5,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}

test/clangd/test-uri-windows.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# REQUIRES: mingw32 || win32
-# It is absolutely vital that this file has CRLF line endings.
-#
-# Test authority-less URI
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 152
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
-# CHECK:    "uri": "file:///C:/clangd-test/foo.c"
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":5,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0","method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+# REQUIRES: mingw32 || win32
+# Test authority-less URI
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
+# CHECK:    "uri": "file:///C:/clangd-test/foo.c"
+---
+{"jsonrpc":"2.0","id":5,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}

test/clangd/trace.test

-# RUN: clangd -pretty -run-synchronously -trace %t < %s && FileCheck %s < %t
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-#
-Content-Length: 152
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
-#      CHECK: {"displayTimeUnit":"ns","traceEvents":[
-# Start opening the doc.
-#      CHECK: "name": "textDocument/didOpen"
-#      CHECK: "ph": "B"
-# Start building the preamble.
-#      CHECK: "name": "Preamble"
-#      CHECK: },
-# Finish building the preamble, with filename.
-#      CHECK: "File": "{{.*}}/foo.c"
-# CHECK-NEXT: },
-# CHECK-NEXT: "ph": "E"
-# Start building the file.
-#      CHECK: "name": "Build"
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":5,"method":"shutdown"}
+# RUN: clangd -lit-test -trace %t < %s && FileCheck %s < %t
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///foo.c","languageId":"c","version":1,"text":"void main() {}"}}}
+#      CHECK: {"displayTimeUnit":"ns","traceEvents":[
+# Start opening the doc.
+#      CHECK: "name": "textDocument/didOpen"
+#      CHECK: "ph": "B"
+# Start building the preamble.
+#      CHECK: "name": "Preamble"
+#      CHECK: },
+# Finish building the preamble, with filename.
+#      CHECK: "File": "{{.*}}/foo.c"
+# CHECK-NEXT: },
+# CHECK-NEXT: "ph": "E"
+# Start building the file.
+#      CHECK: "name": "Build"
+---
+{"jsonrpc":"2.0","id":5,"method":"shutdown"}

test/clangd/unsupported-method.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-
-Content-Length: 143
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":""}}}
-
-Content-Length: 92
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/jumpInTheAirLikeYouJustDontCare","params":{}}
-#      CHECK:  "error": {
-# CHECK-NEXT:    "code": -32601,
-# CHECK-NEXT:    "message": "method not found"
-# CHECK-NEXT:  },
-# CHECK-NEXT:  "id": 1,
-# CHECK-NEXT:  "jsonrpc": "2.0"
-
-Content-Length: 44
-
-{"jsonrpc":"2.0","id":2,"method":"shutdown"}
-Content-Length: 33
-
-{"jsonrpc":"2.0":"method":"exit"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":""}}}
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/jumpInTheAirLikeYouJustDontCare","params":{}}
+#      CHECK:  "error": {
+# CHECK-NEXT:    "code": -32601,
+# CHECK-NEXT:    "message": "method not found"
+# CHECK-NEXT:  },
+# CHECK-NEXT:  "id": 1,
+# CHECK-NEXT:  "jsonrpc": "2.0"
+---
+{"jsonrpc":"2.0","id":2,"method":"shutdown"}
+---
+{"jsonrpc":"2.0":"method":"exit"}

test/clangd/xrefs.test

-# RUN: clangd -pretty -run-synchronously < %s | FileCheck -strict-whitespace %s
-# It is absolutely vital that this file has CRLF line endings.
-#
-Content-Length: 125
-
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
-
-Content-Length: 165
-
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"int x = 0;\nint y = x;"}}}
-
-Content-Length: 148
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/definition","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":1,"character":8}}}
-#      CHECK:  "id": 1,
-# CHECK-NEXT:  "jsonrpc": "2.0",
-# CHECK-NEXT:  "result": [
-# CHECK-NEXT:    {
-# CHECK-NEXT:      "range": {
-# CHECK-NEXT:        "end": {
-# CHECK-NEXT:          "character": 9,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        },
-# CHECK-NEXT:        "start": {
-# CHECK-NEXT:          "character": 0,
-# CHECK-NEXT:          "line": 0
-# CHECK-NEXT:        }
-# CHECK-NEXT:      },
-# CHECK-NEXT:      "uri": "file://{{.*}}/{{([A-Z]:/)?}}main.cpp"
-# CHECK-NEXT:    }
-# CHECK-NEXT:  ]
-Content-Length: 155
-
-{"jsonrpc":"2.0","id":1,"method":"textDocument/documentHighlight","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":1,"character":8}}}
-#      CHECK: "id": 1
-# CHECK-NEXT: "jsonrpc": "2.0",
-# CHECK-NEXT: "result": [
-# CHECK-NEXT:   {
-# CHECK-NEXT:     "kind": 1,
-# CHECK-NEXT:     "range": {
-# CHECK-NEXT:       "end": {
-# CHECK-NEXT:         "character": 5,
-# CHECK-NEXT:         "line": 0
-# CHECK-NEXT:       },
-# CHECK-NEXT:       "start": {
-# CHECK-NEXT:         "character": 4,
-# CHECK-NEXT:         "line": 0
-# CHECK-NEXT:       }
-# CHECK-NEXT:     }
-# CHECK-NEXT:   },
-# CHECK-NEXT:   {
-# CHECK-NEXT:     "kind": 2,
-# CHECK-NEXT:     "range": {
-# CHECK-NEXT:       "end": {
-# CHECK-NEXT:         "character": 9,
-# CHECK-NEXT:         "line": 1
-# CHECK-NEXT:       },
-# CHECK-NEXT:       "start": {
-# CHECK-NEXT:         "character": 8,
-# CHECK-NEXT:         "line": 1
-# CHECK-NEXT:       }
-# CHECK-NEXT:     }
-# CHECK-NEXT:   }
-# CHECK-NEXT: ]
-Content-Length: 48
-
-{"jsonrpc":"2.0","id":10000,"method":"shutdown"}
+# RUN: clangd -lit-test < %s | FileCheck -strict-whitespace %s
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
+---
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"int x = 0;\nint y = x;"}}}
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/definition","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":1,"character":8}}}
+#      CHECK:  "id": 1,
+# CHECK-NEXT:  "jsonrpc": "2.0",
+# CHECK-NEXT:  "result": [
+# CHECK-NEXT:    {
+# CHECK-NEXT:      "range": {
+# CHECK-NEXT:        "end": {
+# CHECK-NEXT:          "character": 9,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        },
+# CHECK-NEXT:        "start": {
+# CHECK-NEXT:          "character": 0,
+# CHECK-NEXT:          "line": 0
+# CHECK-NEXT:        }
+# CHECK-NEXT:      },
+# CHECK-NEXT:      "uri": "file://{{.*}}/{{([A-Z]:/)?}}main.cpp"
+# CHECK-NEXT:    }
+# CHECK-NEXT:  ]
+---
+{"jsonrpc":"2.0","id":1,"method":"textDocument/documentHighlight","params":{"textDocument":{"uri":"test:///main.cpp"},"position":{"line":1,"character":8}}}
+#      CHECK: "id": 1
+# CHECK-NEXT: "jsonrpc": "2.0",
+# CHECK-NEXT: "result": [
+# CHECK-NEXT:   {
+# CHECK-NEXT:     "kind": 1,
+# CHECK-NEXT:     "range": {
+# CHECK-NEXT:       "end": {
+# CHECK-NEXT:         "character": 5,
+# CHECK-NEXT:         "line": 0
+# CHECK-NEXT:       },
+# CHECK-NEXT:       "start": {
+# CHECK-NEXT:         "character": 4,
+# CHECK-NEXT:         "line": 0
+# CHECK-NEXT:       }
+# CHECK-NEXT:     }
+# CHECK-NEXT:   },
+# CHECK-NEXT:   {
+# CHECK-NEXT:     "kind": 2,
+# CHECK-NEXT:     "range": {
+# CHECK-NEXT:       "end": {
+# CHECK-NEXT:         "character": 9,
+# CHECK-NEXT:         "line": 1
+# CHECK-NEXT:       },
+# CHECK-NEXT:       "start": {
+# CHECK-NEXT:         "character": 8,
+# CHECK-NEXT:         "line": 1
+# CHECK-NEXT:       }
+# CHECK-NEXT:     }
+# CHECK-NEXT:   }
+# CHECK-NEXT: ]
+---
+{"jsonrpc":"2.0","id":10000,"method":"shutdown"}