clang-tools-extra/clangd/unittests/IndexActionTests.cpp - rust-lang/llvm-project - Git at Google

 //===------ IndexActionTests.cpp  -------------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//

 #include "Headers.h"
 #include "TestFS.h"
 #include "URI.h"
 #include "index/IndexAction.h"
 #include "index/Serialization.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Tooling/Tooling.h"
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include <string>

 namespace clang {
 namespace clangd {
 namespace {

 using ::testing::AllOf;
 using ::testing::ElementsAre;
 using ::testing::EndsWith;
 using ::testing::Not;
 using ::testing::Pair;
 using ::testing::UnorderedElementsAre;
 using ::testing::UnorderedPointwise;

 std::string toUri(llvm::StringRef Path) { return URI::create(Path).toString(); }

 MATCHER(isTU, "") { return arg.Flags & IncludeGraphNode::SourceFlag::IsTU; }

 MATCHER_P(hasDigest, Digest, "") { return arg.Digest == Digest; }

 MATCHER_P(hasName, Name, "") { return arg.Name == Name; }

 MATCHER(hasSameURI, "") {
   llvm::StringRef URI = ::testing::get<0>(arg);
   const std::string &Path = ::testing::get<1>(arg);
   return toUri(Path) == URI;
 }

 MATCHER_P(includeHeader, P, "") {
   return (arg.IncludeHeaders.size() == 1) &&
          (arg.IncludeHeaders.begin()->IncludeHeader == P);
 }

 ::testing::Matcher<const IncludeGraphNode &>
 includesAre(const std::vector<std::string> &Includes) {
   return ::testing::Field(&IncludeGraphNode::DirectIncludes,
                           UnorderedPointwise(hasSameURI(), Includes));
 }

 void checkNodesAreInitialized(const IndexFileIn &IndexFile,
                               const std::vector<std::string> &Paths) {
   ASSERT_TRUE(IndexFile.Sources);
   EXPECT_THAT(Paths.size(), IndexFile.Sources->size());
   for (llvm::StringRef Path : Paths) {
     auto URI = toUri(Path);
     const auto &Node = IndexFile.Sources->lookup(URI);
     // Uninitialized nodes will have an empty URI.
     EXPECT_EQ(Node.URI.data(), IndexFile.Sources->find(URI)->getKeyData());
   }
 }

 std::map<std::string, const IncludeGraphNode &> toMap(const IncludeGraph &IG) {
   std::map<std::string, const IncludeGraphNode &> Nodes;
   for (auto &I : IG)
     Nodes.emplace(std::string(I.getKey()), I.getValue());
   return Nodes;
 }

 class IndexActionTest : public ::testing::Test {
 public:
   IndexActionTest() : InMemoryFileSystem(new llvm::vfs::InMemoryFileSystem) {}

   IndexFileIn
   runIndexingAction(llvm::StringRef MainFilePath,
                     const std::vector<std::string> &ExtraArgs = {}) {
     IndexFileIn IndexFile;
     llvm::IntrusiveRefCntPtr<FileManager> Files(
         new FileManager(FileSystemOptions(), InMemoryFileSystem));

     auto Action = createStaticIndexingAction(
         Opts, [&](SymbolSlab S) { IndexFile.Symbols = std::move(S); },
         [&](RefSlab R) { IndexFile.Refs = std::move(R); },
         [&](RelationSlab R) { IndexFile.Relations = std::move(R); },
         [&](IncludeGraph IG) { IndexFile.Sources = std::move(IG); });

     std::vector<std::string> Args = {"index_action", "-fsyntax-only",
                                      "-xc++",        "-std=c++11",
                                      "-iquote",      testRoot()};
     Args.insert(Args.end(), ExtraArgs.begin(), ExtraArgs.end());
     Args.push_back(std::string(MainFilePath));

     tooling::ToolInvocation Invocation(
         Args, std::move(Action), Files.get(),
         std::make_shared<PCHContainerOperations>());

     Invocation.run();

     checkNodesAreInitialized(IndexFile, FilePaths);
     return IndexFile;
   }

   void addFile(llvm::StringRef Path, llvm::StringRef Content) {
     InMemoryFileSystem->addFile(Path, 0,
                                 llvm::MemoryBuffer::getMemBufferCopy(Content));
     FilePaths.push_back(std::string(Path));
   }

 protected:
   SymbolCollector::Options Opts;
   std::vector<std::string> FilePaths;
   llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem;
 };

 TEST_F(IndexActionTest, CollectIncludeGraph) {
   std::string MainFilePath = testPath("main.cpp");
   std::string MainCode = "#include \"level1.h\"";
   std::string Level1HeaderPath = testPath("level1.h");
   std::string Level1HeaderCode = "#include \"level2.h\"";
   std::string Level2HeaderPath = testPath("level2.h");
   std::string Level2HeaderCode = "";

   addFile(MainFilePath, MainCode);
   addFile(Level1HeaderPath, Level1HeaderCode);
   addFile(Level2HeaderPath, Level2HeaderCode);

   IndexFileIn IndexFile = runIndexingAction(MainFilePath);
   auto Nodes = toMap(*IndexFile.Sources);

   EXPECT_THAT(Nodes,
               UnorderedElementsAre(
                   Pair(toUri(MainFilePath),
                        AllOf(isTU(), includesAre({Level1HeaderPath}),
                              hasDigest(digest(MainCode)))),
                   Pair(toUri(Level1HeaderPath),
                        AllOf(Not(isTU()), includesAre({Level2HeaderPath}),
                              hasDigest(digest(Level1HeaderCode)))),
                   Pair(toUri(Level2HeaderPath),
                        AllOf(Not(isTU()), includesAre({}),
                              hasDigest(digest(Level2HeaderCode))))));
 }

 TEST_F(IndexActionTest, IncludeGraphSelfInclude) {
   std::string MainFilePath = testPath("main.cpp");
   std::string MainCode = "#include \"header.h\"";
   std::string HeaderPath = testPath("header.h");
   std::string HeaderCode = R"cpp(
       #ifndef _GUARD_
       #define _GUARD_
       #include "header.h"
       #endif)cpp";

   addFile(MainFilePath, MainCode);
   addFile(HeaderPath, HeaderCode);

   IndexFileIn IndexFile = runIndexingAction(MainFilePath);
   auto Nodes = toMap(*IndexFile.Sources);

   EXPECT_THAT(
       Nodes,
       UnorderedElementsAre(
           Pair(toUri(MainFilePath), AllOf(isTU(), includesAre({HeaderPath}),
                                           hasDigest(digest(MainCode)))),
           Pair(toUri(HeaderPath), AllOf(Not(isTU()), includesAre({HeaderPath}),
                                         hasDigest(digest(HeaderCode))))));
 }

 TEST_F(IndexActionTest, IncludeGraphSkippedFile) {
   std::string MainFilePath = testPath("main.cpp");
   std::string MainCode = R"cpp(
       #include "common.h"
       #include "header.h"
       )cpp";

   std::string CommonHeaderPath = testPath("common.h");
   std::string CommonHeaderCode = R"cpp(
       #ifndef _GUARD_
       #define _GUARD_
       void f();
       #endif)cpp";

   std::string HeaderPath = testPath("header.h");
   std::string HeaderCode = R"cpp(
       #include "common.h"
       void g();)cpp";

   addFile(MainFilePath, MainCode);
   addFile(HeaderPath, HeaderCode);
   addFile(CommonHeaderPath, CommonHeaderCode);

   IndexFileIn IndexFile = runIndexingAction(MainFilePath);
   auto Nodes = toMap(*IndexFile.Sources);

   EXPECT_THAT(
       Nodes, UnorderedElementsAre(
                  Pair(toUri(MainFilePath),
                       AllOf(isTU(), includesAre({HeaderPath, CommonHeaderPath}),
                             hasDigest(digest(MainCode)))),
                  Pair(toUri(HeaderPath),
                       AllOf(Not(isTU()), includesAre({CommonHeaderPath}),
                             hasDigest(digest(HeaderCode)))),
                  Pair(toUri(CommonHeaderPath),
                       AllOf(Not(isTU()), includesAre({}),
                             hasDigest(digest(CommonHeaderCode))))));
 }

 TEST_F(IndexActionTest, IncludeGraphDynamicInclude) {
   std::string MainFilePath = testPath("main.cpp");
   std::string MainCode = R"cpp(
       #ifndef FOO
       #define FOO "main.cpp"
       #else
       #define FOO "header.h"
       #endif

       #include FOO)cpp";
   std::string HeaderPath = testPath("header.h");
   std::string HeaderCode = "";

   addFile(MainFilePath, MainCode);
   addFile(HeaderPath, HeaderCode);

   IndexFileIn IndexFile = runIndexingAction(MainFilePath);
   auto Nodes = toMap(*IndexFile.Sources);

   EXPECT_THAT(
       Nodes,
       UnorderedElementsAre(
           Pair(toUri(MainFilePath),
                AllOf(isTU(), includesAre({MainFilePath, HeaderPath}),
                      hasDigest(digest(MainCode)))),
           Pair(toUri(HeaderPath), AllOf(Not(isTU()), includesAre({}),
                                         hasDigest(digest(HeaderCode))))));
 }

 TEST_F(IndexActionTest, NoWarnings) {
   std::string MainFilePath = testPath("main.cpp");
   std::string MainCode = R"cpp(
       void foo(int x) {
         if (x = 1) // -Wparentheses
           return;
         if (x = 1) // -Wparentheses
           return;
       }
       void bar() {}
   )cpp";
   addFile(MainFilePath, MainCode);
   // We set -ferror-limit so the warning-promoted-to-error would be fatal.
   // This would cause indexing to stop (if warnings weren't disabled).
   IndexFileIn IndexFile = runIndexingAction(
       MainFilePath, {"-ferror-limit=1", "-Wparentheses", "-Werror"});
   ASSERT_TRUE(IndexFile.Sources);
   ASSERT_NE(0u, IndexFile.Sources->size());
   EXPECT_THAT(*IndexFile.Symbols, ElementsAre(hasName("foo"), hasName("bar")));
 }

 TEST_F(IndexActionTest, SkipFiles) {
   std::string MainFilePath = testPath("main.cpp");
   addFile(MainFilePath, R"cpp(
     // clang-format off
     #include "good.h"
     #include "bad.h"
     // clang-format on
   )cpp");
   addFile(testPath("good.h"), R"cpp(
     struct S { int s; };
     void f1() { S f; }
     auto unskippable1() { return S(); }
   )cpp");
   addFile(testPath("bad.h"), R"cpp(
     struct T { S t; };
     void f2() { S f; }
     auto unskippable2() { return S(); }
   )cpp");
   Opts.FileFilter = [](const SourceManager &SM, FileID F) {
     return !SM.getFileEntryRefForID(F)->getName().ends_with("bad.h");
   };
   IndexFileIn IndexFile = runIndexingAction(MainFilePath, {"-std=c++14"});
   EXPECT_THAT(*IndexFile.Symbols,
               UnorderedElementsAre(hasName("S"), hasName("s"), hasName("f1"),
                                    hasName("unskippable1")));
   for (const auto &Pair : *IndexFile.Refs)
     for (const auto &Ref : Pair.second)
       EXPECT_THAT(Ref.Location.FileURI, EndsWith("good.h"));
 }

 TEST_F(IndexActionTest, SkipNestedSymbols) {
   std::string MainFilePath = testPath("main.cpp");
   addFile(MainFilePath, R"cpp(
   namespace ns1 {
   namespace ns2 {
   namespace ns3 {
   namespace ns4 {
   namespace ns5 {
   namespace ns6 {
   namespace ns7 {
   namespace ns8 {
   namespace ns9 {
   class Bar {};
   void foo() {
     class Baz {};
   }
   }
   }
   }
   }
   }
   }
   }
   }
   })cpp");
   IndexFileIn IndexFile = runIndexingAction(MainFilePath, {"-std=c++14"});
   EXPECT_THAT(*IndexFile.Symbols, testing::Contains(hasName("foo")));
   EXPECT_THAT(*IndexFile.Symbols, testing::Contains(hasName("Bar")));
   EXPECT_THAT(*IndexFile.Symbols, Not(testing::Contains(hasName("Baz"))));
 }

 TEST_F(IndexActionTest, SymbolFromCC) {
   std::string MainFilePath = testPath("main.cpp");
   addFile(MainFilePath, R"cpp(
  #include "main.h"
  void foo() {}
  )cpp");
   addFile(testPath("main.h"), R"cpp(
  #pragma once
  void foo();
  )cpp");
   Opts.FileFilter = [](const SourceManager &SM, FileID F) {
     return !SM.getFileEntryRefForID(F)->getName().ends_with("main.h");
   };
   IndexFileIn IndexFile = runIndexingAction(MainFilePath, {"-std=c++14"});
   EXPECT_THAT(*IndexFile.Symbols,
               UnorderedElementsAre(AllOf(
                   hasName("foo"),
                   includeHeader(URI::create(testPath("main.h")).toString()))));
 }

 TEST_F(IndexActionTest, IncludeHeaderForwardDecls) {
   std::string MainFilePath = testPath("main.cpp");
   addFile(MainFilePath, R"cpp(
 #include "fwd.h"
 #include "full.h"
  )cpp");
   addFile(testPath("fwd.h"), R"cpp(
 #ifndef _FWD_H_
 #define _FWD_H_
 struct Foo;
 #endif
  )cpp");
   addFile(testPath("full.h"), R"cpp(
 #ifndef _FULL_H_
 #define _FULL_H_
 struct Foo {};

 // This decl is important, as otherwise we detect control macro for the file,
 // before handling definition of Foo.
 void other();
 #endif
  )cpp");
   IndexFileIn IndexFile = runIndexingAction(MainFilePath);
   EXPECT_THAT(*IndexFile.Symbols,
               testing::Contains(AllOf(
                   hasName("Foo"),
                   includeHeader(URI::create(testPath("full.h")).toString()))))
       << *IndexFile.Symbols->begin();
 }
 } // namespace
 } // namespace clangd
 } // namespace clang
	//===------ IndexActionTests.cpp -------------------------------- C++ --===//
	//
	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	// See https://llvm.org/LICENSE.txt for license information.
	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
	//
	//===----------------------------------------------------------------------===//

	#include "Headers.h"
	#include "TestFS.h"
	#include "URI.h"
	#include "index/IndexAction.h"
	#include "index/Serialization.h"
	#include "clang/Basic/SourceLocation.h"
	#include "clang/Basic/SourceManager.h"
	#include "clang/Tooling/Tooling.h"
	#include "gmock/gmock.h"
	#include "gtest/gtest.h"
	#include <string>

	namespace clang {
	namespace clangd {
	namespace {

	using ::testing::AllOf;
	using ::testing::ElementsAre;
	using ::testing::EndsWith;
	using ::testing::Not;
	using ::testing::Pair;
	using ::testing::UnorderedElementsAre;
	using ::testing::UnorderedPointwise;

	std::string toUri(llvm::StringRef Path) { return URI::create(Path).toString(); }

	MATCHER(isTU, "") { return arg.Flags & IncludeGraphNode::SourceFlag::IsTU; }

	MATCHER_P(hasDigest, Digest, "") { return arg.Digest == Digest; }

	MATCHER_P(hasName, Name, "") { return arg.Name == Name; }

	MATCHER(hasSameURI, "") {
	llvm::StringRef URI = ::testing::get<0>(arg);
	const std::string &Path = ::testing::get<1>(arg);
	return toUri(Path) == URI;
	}

	MATCHER_P(includeHeader, P, "") {
	return (arg.IncludeHeaders.size() == 1) &&
	(arg.IncludeHeaders.begin()->IncludeHeader == P);
	}

	::testing::Matcher<const IncludeGraphNode &>
	includesAre(const std::vector<std::string> &Includes) {
	return ::testing::Field(&IncludeGraphNode::DirectIncludes,
	UnorderedPointwise(hasSameURI(), Includes));
	}

	void checkNodesAreInitialized(const IndexFileIn &IndexFile,
	const std::vector<std::string> &Paths) {
	ASSERT_TRUE(IndexFile.Sources);
	EXPECT_THAT(Paths.size(), IndexFile.Sources->size());
	for (llvm::StringRef Path : Paths) {
	auto URI = toUri(Path);
	const auto &Node = IndexFile.Sources->lookup(URI);
	// Uninitialized nodes will have an empty URI.
	EXPECT_EQ(Node.URI.data(), IndexFile.Sources->find(URI)->getKeyData());
	}
	}

	std::map<std::string, const IncludeGraphNode &> toMap(const IncludeGraph &IG) {
	std::map<std::string, const IncludeGraphNode &> Nodes;
	for (auto &I : IG)
	Nodes.emplace(std::string(I.getKey()), I.getValue());
	return Nodes;
	}

	class IndexActionTest : public ::testing::Test {
	public:
	IndexActionTest() : InMemoryFileSystem(new llvm::vfs::InMemoryFileSystem) {}

	IndexFileIn
	runIndexingAction(llvm::StringRef MainFilePath,
	const std::vector<std::string> &ExtraArgs = {}) {
	IndexFileIn IndexFile;
	llvm::IntrusiveRefCntPtr<FileManager> Files(
	new FileManager(FileSystemOptions(), InMemoryFileSystem));

	auto Action = createStaticIndexingAction(
	Opts, [&](SymbolSlab S) { IndexFile.Symbols = std::move(S); },
	[&](RefSlab R) { IndexFile.Refs = std::move(R); },
	[&](RelationSlab R) { IndexFile.Relations = std::move(R); },
	[&](IncludeGraph IG) { IndexFile.Sources = std::move(IG); });

	std::vector<std::string> Args = {"index_action", "-fsyntax-only",
	"-xc++", "-std=c++11",
	"-iquote", testRoot()};
	Args.insert(Args.end(), ExtraArgs.begin(), ExtraArgs.end());
	Args.push_back(std::string(MainFilePath));

	tooling::ToolInvocation Invocation(
	Args, std::move(Action), Files.get(),
	std::make_shared<PCHContainerOperations>());

	Invocation.run();

	checkNodesAreInitialized(IndexFile, FilePaths);
	return IndexFile;
	}

	void addFile(llvm::StringRef Path, llvm::StringRef Content) {
	InMemoryFileSystem->addFile(Path, 0,
	llvm::MemoryBuffer::getMemBufferCopy(Content));
	FilePaths.push_back(std::string(Path));
	}

	protected:
	SymbolCollector::Options Opts;
	std::vector<std::string> FilePaths;
	llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem;
	};

	TEST_F(IndexActionTest, CollectIncludeGraph) {
	std::string MainFilePath = testPath("main.cpp");
	std::string MainCode = "#include \"level1.h\"";
	std::string Level1HeaderPath = testPath("level1.h");
	std::string Level1HeaderCode = "#include \"level2.h\"";
	std::string Level2HeaderPath = testPath("level2.h");
	std::string Level2HeaderCode = "";

	addFile(MainFilePath, MainCode);
	addFile(Level1HeaderPath, Level1HeaderCode);
	addFile(Level2HeaderPath, Level2HeaderCode);

	IndexFileIn IndexFile = runIndexingAction(MainFilePath);
	auto Nodes = toMap(*IndexFile.Sources);

	EXPECT_THAT(Nodes,
	UnorderedElementsAre(
	Pair(toUri(MainFilePath),
	AllOf(isTU(), includesAre({Level1HeaderPath}),
	hasDigest(digest(MainCode)))),
	Pair(toUri(Level1HeaderPath),
	AllOf(Not(isTU()), includesAre({Level2HeaderPath}),
	hasDigest(digest(Level1HeaderCode)))),
	Pair(toUri(Level2HeaderPath),
	AllOf(Not(isTU()), includesAre({}),
	hasDigest(digest(Level2HeaderCode))))));
	}

	TEST_F(IndexActionTest, IncludeGraphSelfInclude) {
	std::string MainFilePath = testPath("main.cpp");
	std::string MainCode = "#include \"header.h\"";
	std::string HeaderPath = testPath("header.h");
	std::string HeaderCode = R"cpp(
	#ifndef _GUARD_
	#define _GUARD_
	#include "header.h"
	#endif)cpp";

	addFile(MainFilePath, MainCode);
	addFile(HeaderPath, HeaderCode);

	IndexFileIn IndexFile = runIndexingAction(MainFilePath);
	auto Nodes = toMap(*IndexFile.Sources);

	EXPECT_THAT(
	Nodes,
	UnorderedElementsAre(
	Pair(toUri(MainFilePath), AllOf(isTU(), includesAre({HeaderPath}),
	hasDigest(digest(MainCode)))),
	Pair(toUri(HeaderPath), AllOf(Not(isTU()), includesAre({HeaderPath}),
	hasDigest(digest(HeaderCode))))));
	}

	TEST_F(IndexActionTest, IncludeGraphSkippedFile) {
	std::string MainFilePath = testPath("main.cpp");
	std::string MainCode = R"cpp(
	#include "common.h"
	#include "header.h"
	)cpp";

	std::string CommonHeaderPath = testPath("common.h");
	std::string CommonHeaderCode = R"cpp(
	#ifndef _GUARD_
	#define _GUARD_
	void f();
	#endif)cpp";

	std::string HeaderPath = testPath("header.h");
	std::string HeaderCode = R"cpp(
	#include "common.h"
	void g();)cpp";

	addFile(MainFilePath, MainCode);
	addFile(HeaderPath, HeaderCode);
	addFile(CommonHeaderPath, CommonHeaderCode);

	IndexFileIn IndexFile = runIndexingAction(MainFilePath);
	auto Nodes = toMap(*IndexFile.Sources);

	EXPECT_THAT(
	Nodes, UnorderedElementsAre(
	Pair(toUri(MainFilePath),
	AllOf(isTU(), includesAre({HeaderPath, CommonHeaderPath}),
	hasDigest(digest(MainCode)))),
	Pair(toUri(HeaderPath),
	AllOf(Not(isTU()), includesAre({CommonHeaderPath}),
	hasDigest(digest(HeaderCode)))),
	Pair(toUri(CommonHeaderPath),
	AllOf(Not(isTU()), includesAre({}),
	hasDigest(digest(CommonHeaderCode))))));
	}

	TEST_F(IndexActionTest, IncludeGraphDynamicInclude) {
	std::string MainFilePath = testPath("main.cpp");
	std::string MainCode = R"cpp(
	#ifndef FOO
	#define FOO "main.cpp"
	#else
	#define FOO "header.h"
	#endif

	#include FOO)cpp";
	std::string HeaderPath = testPath("header.h");
	std::string HeaderCode = "";

	addFile(MainFilePath, MainCode);
	addFile(HeaderPath, HeaderCode);

	IndexFileIn IndexFile = runIndexingAction(MainFilePath);
	auto Nodes = toMap(*IndexFile.Sources);

	EXPECT_THAT(
	Nodes,
	UnorderedElementsAre(
	Pair(toUri(MainFilePath),
	AllOf(isTU(), includesAre({MainFilePath, HeaderPath}),
	hasDigest(digest(MainCode)))),
	Pair(toUri(HeaderPath), AllOf(Not(isTU()), includesAre({}),
	hasDigest(digest(HeaderCode))))));
	}

	TEST_F(IndexActionTest, NoWarnings) {
	std::string MainFilePath = testPath("main.cpp");
	std::string MainCode = R"cpp(
	void foo(int x) {
	if (x = 1) // -Wparentheses
	return;
	if (x = 1) // -Wparentheses
	return;
	}
	void bar() {}
	)cpp";
	addFile(MainFilePath, MainCode);
	// We set -ferror-limit so the warning-promoted-to-error would be fatal.
	// This would cause indexing to stop (if warnings weren't disabled).
	IndexFileIn IndexFile = runIndexingAction(
	MainFilePath, {"-ferror-limit=1", "-Wparentheses", "-Werror"});
	ASSERT_TRUE(IndexFile.Sources);
	ASSERT_NE(0u, IndexFile.Sources->size());
	EXPECT_THAT(*IndexFile.Symbols, ElementsAre(hasName("foo"), hasName("bar")));
	}

	TEST_F(IndexActionTest, SkipFiles) {
	std::string MainFilePath = testPath("main.cpp");
	addFile(MainFilePath, R"cpp(
	// clang-format off
	#include "good.h"
	#include "bad.h"
	// clang-format on
	)cpp");
	addFile(testPath("good.h"), R"cpp(
	struct S { int s; };
	void f1() { S f; }
	auto unskippable1() { return S(); }
	)cpp");
	addFile(testPath("bad.h"), R"cpp(
	struct T { S t; };
	void f2() { S f; }
	auto unskippable2() { return S(); }
	)cpp");
	Opts.FileFilter = [](const SourceManager &SM, FileID F) {
	return !SM.getFileEntryRefForID(F)->getName().ends_with("bad.h");
	};
	IndexFileIn IndexFile = runIndexingAction(MainFilePath, {"-std=c++14"});
	EXPECT_THAT(*IndexFile.Symbols,
	UnorderedElementsAre(hasName("S"), hasName("s"), hasName("f1"),
	hasName("unskippable1")));
	for (const auto &Pair : *IndexFile.Refs)
	for (const auto &Ref : Pair.second)
	EXPECT_THAT(Ref.Location.FileURI, EndsWith("good.h"));
	}

	TEST_F(IndexActionTest, SkipNestedSymbols) {
	std::string MainFilePath = testPath("main.cpp");
	addFile(MainFilePath, R"cpp(
	namespace ns1 {
	namespace ns2 {
	namespace ns3 {
	namespace ns4 {
	namespace ns5 {
	namespace ns6 {
	namespace ns7 {
	namespace ns8 {
	namespace ns9 {
	class Bar {};
	void foo() {
	class Baz {};
	}
	}
	}
	}
	}
	}
	}
	}
	}
	})cpp");
	IndexFileIn IndexFile = runIndexingAction(MainFilePath, {"-std=c++14"});
	EXPECT_THAT(*IndexFile.Symbols, testing::Contains(hasName("foo")));
	EXPECT_THAT(*IndexFile.Symbols, testing::Contains(hasName("Bar")));
	EXPECT_THAT(*IndexFile.Symbols, Not(testing::Contains(hasName("Baz"))));
	}

	TEST_F(IndexActionTest, SymbolFromCC) {
	std::string MainFilePath = testPath("main.cpp");
	addFile(MainFilePath, R"cpp(
	#include "main.h"
	void foo() {}
	)cpp");
	addFile(testPath("main.h"), R"cpp(
	#pragma once
	void foo();
	)cpp");
	Opts.FileFilter = [](const SourceManager &SM, FileID F) {
	return !SM.getFileEntryRefForID(F)->getName().ends_with("main.h");
	};
	IndexFileIn IndexFile = runIndexingAction(MainFilePath, {"-std=c++14"});
	EXPECT_THAT(*IndexFile.Symbols,
	UnorderedElementsAre(AllOf(
	hasName("foo"),
	includeHeader(URI::create(testPath("main.h")).toString()))));
	}

	TEST_F(IndexActionTest, IncludeHeaderForwardDecls) {
	std::string MainFilePath = testPath("main.cpp");
	addFile(MainFilePath, R"cpp(
	#include "fwd.h"
	#include "full.h"
	)cpp");
	addFile(testPath("fwd.h"), R"cpp(
	#ifndef _FWD_H_
	#define _FWD_H_
	struct Foo;
	#endif
	)cpp");
	addFile(testPath("full.h"), R"cpp(
	#ifndef _FULL_H_
	#define _FULL_H_
	struct Foo {};

	// This decl is important, as otherwise we detect control macro for the file,
	// before handling definition of Foo.
	void other();
	#endif
	)cpp");
	IndexFileIn IndexFile = runIndexingAction(MainFilePath);
	EXPECT_THAT(*IndexFile.Symbols,
	testing::Contains(AllOf(
	hasName("Foo"),
	includeHeader(URI::create(testPath("full.h")).toString()))))
	<< *IndexFile.Symbols->begin();
	}
	} // namespace
	} // namespace clangd
	} // namespace clang