[clangd] Make system-include-extractor.test more resilient in the face of paths with special characters

[sammccall]

LG, I committed https://github.com/llvm/llvm-project/commit/96d771c4707df9b3153ea5a8451f2bbbe17c8917 but was too lazy to add the comment, feel free to land this or not.

[ayzhao]

Thanks for the quick fix! I patched this in and I can confirm it fixes the issue.

[nridge]

Great minds :)

clang-tools-extra/clangd/test/system-include-extractor.test

---
   }
 }
 # Look for the "ASTWorker building file" line so that the subsequent diagnostics
 # that are matches are for the C++ source file and not a config file.
 # CHECK: ASTWorker building file
 # CHECK:   "method": "textDocument/publishDiagnostics",
 # CHECK-NEXT:   "params": {
 # CHECK-NEXT:     "diagnostics": [],
-# CHECK-NEXT:     "uri": "file://INPUT_DIR/the-file.cpp",
+# Double-check that the diagnostics pertain to the intended file.
+# We don't match the path portion exactly to avoid issues around URL escaping.
+# CHECK-NEXT:     "uri": "file://{{.*}}/the-file.cpp",
 ---
 {"jsonrpc":"2.0","id":10000,"method":"shutdown"}
 ---
 {"jsonrpc":"2.0","method":"exit"}
 
 # Generate a different compile_commands.json which does not point to the mock driver
 # RUN: echo '[{"directory": "%/t.dir", "command": "gcc the-file.cpp -nostdinc --sysroot /my/sysroot/path -isysroot=/isysroot", "file": "the-file.cpp"}]' > %t.dir/compile_commands.json
 
 # Generate a clangd config file which points to the mock driver instead
 # RUN: echo 'CompileFlags:' > %t.dir/.clangd
 # RUN: echo '  Compiler: my_driver.sh' >> %t.dir/.clangd
 
 # Run clangd a second time, to make sure it picks up the driver name from the config file
 # Note, we need to pass -enable-config because -lit-test otherwise disables it
 # RUN: clangd -lit-test -enable-config -query-driver="**.test,**.sh" < %t.test 2>&1 | FileCheck -strict-whitespace %t.test