[unittest] Skip the socket tests if we $TMPDIR is too long.

[JDevlieghere]

Summary

Adrian added a sanity check to the socket tests to ensure the $TMPDIR is not to long for a socket. While this is great for diagnosing the problem it doesn't really solve the problem for environment where you have no control over that variable such as in CI. I propose to just skip the test in that case similar to what we do for tests that rely on targets that are not currently build, etc.

unittests/Host/SocketTest.cpp

 }
 
 #ifndef LLDB_DISABLE_POSIX
 TEST_F(SocketTest, DomainListenConnectAccept) {
   llvm::SmallString<64> Path;
   std::error_code EC = llvm::sys::fs::createUniqueDirectory("DomainListenConnectAccept", Path);
   ASSERT_FALSE(EC);
   llvm::sys::path::append(Path, "test");
-  // If this fails, $TMPDIR is too long to hold a domain socket.
-  EXPECT_LE(Path.size(), 107u);
+
+  // Skip the test if the $TMPDIR is too long to hold a domain socket.
+  if (Path.size() > 107u)
+    return;
 
   std::unique_ptr<DomainSocket> socket_a_up;
   std::unique_ptr<DomainSocket> socket_b_up;
   CreateDomainConnectedSockets(Path, &socket_a_up, &socket_b_up);
 }
 #endif
 
 TEST_F(SocketTest, TCPListen0ConnectAccept) {

 
 #ifndef LLDB_DISABLE_POSIX
 TEST_F(SocketTest, DomainGetConnectURI) {
   llvm::SmallString<64> domain_path;
   std::error_code EC =
       llvm::sys::fs::createUniqueDirectory("DomainListenConnectAccept", domain_path);
   ASSERT_FALSE(EC);
   llvm::sys::path::append(domain_path, "test");
-  // If this fails, $TMPDIR is too long to hold a domain socket.
-  EXPECT_LE(domain_path.size(), 107u);
+
+  // Skip the test if the $TMPDIR is too long to hold a domain socket.
+  if (domain_path.size() > 107u)
+    return;
 
   std::unique_ptr<DomainSocket> socket_a_up;
   std::unique_ptr<DomainSocket> socket_b_up;
   CreateDomainConnectedSockets(domain_path, &socket_a_up, &socket_b_up);
 
   llvm::StringRef scheme;
   llvm::StringRef hostname;
   int port;
   llvm::StringRef path;
   std::string uri(socket_a_up->GetRemoteConnectionURI());
   EXPECT_TRUE(UriParser::Parse(uri, scheme, hostname, port, path));
   EXPECT_EQ(scheme, "unix-connect");
   EXPECT_EQ(path, domain_path);
 }
 #endif