Investigate D110386 Windows failures

Add more information for test failures inspection.

Author: kirillbobyrev

clang-tools-extra/clangd/Headers.h

@@ -20,6 +20,7 @@
 #include "clang/Lex/PPCallbacks.h"
 #include "clang/Tooling/Inclusions/HeaderIncludes.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSet.h"
 #include "llvm/Support/Error.h"
@@ -141,6 +142,11 @@ class IncludeStructure {
 
   std::vector<Inclusion> MainFileIncludes;
 
+  std::string dump() {
+    return "RealPathNames: " +
+           llvm::join(RealPathNames.begin(), RealPathNames.end(), ", ");
+  }
+
 private:
   std::vector<std::string> RealPathNames; // In HeaderID order.
   // HeaderID maps the FileEntry::Name to the internal representation.

clang-tools-extra/clangd/unittests/HeadersTests.cpp

@@ -165,7 +165,8 @@ TEST_F(HeadersTest, CollectRewrittenAndResolved) {
                   AllOf(Written("\"sub/bar.h\""), Resolved(BarHeader))));
   EXPECT_THAT(Includes.includeDepth(getID(MainFile, Includes)),
               UnorderedElementsAre(Distance(getID(MainFile, Includes), 0u),
-                                   Distance(getID(BarHeader, Includes), 1u)));
+                                   Distance(getID(BarHeader, Includes), 1u)))
+      << Includes.dump();
 }
 
 TEST_F(HeadersTest, OnlyCollectInclusionsInMain) {
@@ -179,17 +180,19 @@ TEST_F(HeadersTest, OnlyCollectInclusionsInMain) {
 #include "bar.h"
 )cpp";
   auto Includes = collectIncludes();
-  EXPECT_THAT(Includes.MainFileIncludes,
-              UnorderedElementsAre(
-                  AllOf(Written("\"bar.h\""), Resolved(BarHeader))));
+  EXPECT_THAT(
+      Includes.MainFileIncludes,
+      UnorderedElementsAre(AllOf(Written("\"bar.h\""), Resolved(BarHeader))));
   EXPECT_THAT(Includes.includeDepth(getID(MainFile, Includes)),
               UnorderedElementsAre(Distance(getID(MainFile, Includes), 0u),
                                    Distance(getID(BarHeader, Includes), 1u),
-                                   Distance(getID(BazHeader, Includes), 2u)));
+                                   Distance(getID(BazHeader, Includes), 2u)))
+      << Includes.dump();
   // includeDepth() also works for non-main files.
   EXPECT_THAT(Includes.includeDepth(getID(BarHeader, Includes)),
               UnorderedElementsAre(Distance(getID(BarHeader, Includes), 0u),
-                                   Distance(getID(BazHeader, Includes), 1u)));
+                                   Distance(getID(BazHeader, Includes), 1u)))
+      << Includes.dump();
 }
 
 TEST_F(HeadersTest, PreambleIncludesPresentOnce) {
@@ -240,7 +243,7 @@ TEST_F(HeadersTest, IncludedFilesGraph) {
                    {getID(BarHeader, Includes), getID(FooHeader, Includes)}},
                   {getID(FooHeader, Includes),
                    {getID(BarHeader, Includes), getID(BazHeader, Includes)}}};
-  EXPECT_EQ(Includes.IncludeChildren, Expected);
+  EXPECT_EQ(Includes.IncludeChildren, Expected) << Includes.dump();
 }
 
 TEST_F(HeadersTest, IncludeDirective) {

clang-tools-extra/clangd/unittests/ParsedASTTests.cpp

@@ -519,7 +519,8 @@ TEST(ParsedASTTest, PatchesAdditionalIncludes) {
   auto AuxFE = FM.getFile(testPath("sub/aux.h"));
   ASSERT_TRUE(AuxFE);
   auto AuxID = Includes.getID(*AuxFE);
-  EXPECT_THAT(Includes.IncludeChildren[*MainID], Contains(*AuxID));
+  EXPECT_THAT(Includes.IncludeChildren[*MainID], Contains(*AuxID))
+      << Includes.dump();
 }
 
 TEST(ParsedASTTest, PatchesDeletedIncludes) {