Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1 | //===- unittest/AST/ExternalASTSourceTest.cpp -----------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file contains tests for Clang's ExternalASTSource. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "clang/AST/ASTConsumer.h" |
| 15 | #include "clang/AST/ASTContext.h" |
| 16 | #include "clang/AST/ExternalASTSource.h" |
| 17 | #include "clang/Frontend/CompilerInstance.h" |
| 18 | #include "clang/Frontend/CompilerInvocation.h" |
| 19 | #include "clang/Frontend/FrontendActions.h" |
| 20 | #include "gtest/gtest.h" |
| 21 | |
| 22 | using namespace clang; |
| 23 | using namespace llvm; |
| 24 | |
| 25 | |
| 26 | class TestFrontendAction : public ASTFrontendAction { |
| 27 | public: |
| 28 | TestFrontendAction(ExternalASTSource *Source) : Source(Source) {} |
| 29 | |
| 30 | private: |
Pirama Arumuga Nainar | 33337ca | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 31 | void ExecuteAction() override { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 32 | getCompilerInstance().getASTContext().setExternalSource(Source); |
| 33 | getCompilerInstance().getASTContext().getTranslationUnitDecl() |
| 34 | ->setHasExternalVisibleStorage(); |
| 35 | return ASTFrontendAction::ExecuteAction(); |
| 36 | } |
| 37 | |
Pirama Arumuga Nainar | 33337ca | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 38 | std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI, |
| 39 | StringRef InFile) override { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 40 | return llvm::make_unique<ASTConsumer>(); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | IntrusiveRefCntPtr<ExternalASTSource> Source; |
| 44 | }; |
| 45 | |
| 46 | bool testExternalASTSource(ExternalASTSource *Source, |
| 47 | StringRef FileContents) { |
| 48 | CompilerInstance Compiler; |
| 49 | Compiler.createDiagnostics(); |
| 50 | |
| 51 | CompilerInvocation *Invocation = new CompilerInvocation; |
| 52 | Invocation->getPreprocessorOpts().addRemappedFile( |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 53 | "test.cc", MemoryBuffer::getMemBuffer(FileContents).release()); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 54 | const char *Args[] = { "test.cc" }; |
| 55 | CompilerInvocation::CreateFromArgs(*Invocation, Args, |
| 56 | Args + array_lengthof(Args), |
| 57 | Compiler.getDiagnostics()); |
| 58 | Compiler.setInvocation(Invocation); |
| 59 | |
| 60 | TestFrontendAction Action(Source); |
| 61 | return Compiler.ExecuteAction(Action); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | // Ensure that a failed name lookup into an external source only occurs once. |
| 66 | TEST(ExternalASTSourceTest, FailedLookupOccursOnce) { |
| 67 | struct TestSource : ExternalASTSource { |
| 68 | TestSource(unsigned &Calls) : Calls(Calls) {} |
| 69 | |
Pirama Arumuga Nainar | 33337ca | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 70 | bool FindExternalVisibleDeclsByName(const DeclContext *, |
| 71 | DeclarationName Name) override { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 72 | if (Name.getAsString() == "j") |
| 73 | ++Calls; |
| 74 | return false; |
| 75 | } |
| 76 | |
| 77 | unsigned &Calls; |
| 78 | }; |
| 79 | |
| 80 | unsigned Calls = 0; |
| 81 | ASSERT_TRUE(testExternalASTSource(new TestSource(Calls), "int j, k = j;")); |
| 82 | EXPECT_EQ(1u, Calls); |
| 83 | } |