unittests/Frontend/FrontendActionTest.cpp

   1 //===- unittests/Frontend/FrontendActionTest.cpp - FrontendAction tests ---===//
   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 #include "clang/AST/RecursiveASTVisitor.h"
  11 #include "clang/AST/ASTConsumer.h"
  12 #include "clang/Frontend/CompilerInstance.h"
  13 #include "clang/Frontend/CompilerInvocation.h"
  14 #include "clang/Frontend/FrontendAction.h"
  15
  16 #include "llvm/ADT/Triple.h"
  17 #include "llvm/LLVMContext.h"
  18 #include "llvm/Support/MemoryBuffer.h"
  19
  20 #include "gtest/gtest.h"
  21
  22 using namespace llvm;
  23 using namespace clang;
  24
  25 namespace {
  26
  27 class TestASTFrontendAction : public ASTFrontendAction {
  28 public:
  29   std::vector<std::string> decl_names;
  30
  31   virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
  32                                          StringRef InFile) {
  33     return new Visitor(decl_names);
  34   }
  35
  36 private:
  37   class Visitor : public ASTConsumer, public RecursiveASTVisitor<Visitor> {
  38   public:
  39     Visitor(std::vector<std::string> &decl_names) : decl_names_(decl_names) {}
  40
  41     virtual void HandleTranslationUnit(ASTContext &context) {
  42       TraverseDecl(context.getTranslationUnitDecl());
  43     }
  44
  45     virtual bool VisitNamedDecl(NamedDecl *Decl) {
  46       decl_names_.push_back(Decl->getQualifiedNameAsString());
  47       return true;
  48     }
  49
  50   private:
  51     std::vector<std::string> &decl_names_;
  52   };
  53 };
  54
  55 TEST(ASTFrontendAction, Sanity) {
  56   CompilerInvocation *invocation = new CompilerInvocation;
  57   invocation->getPreprocessorOpts().addRemappedFile(
  58     "test.cc", MemoryBuffer::getMemBuffer("int main() { float x; }"));
  59   invocation->getFrontendOpts().Inputs.push_back(
  60     std::make_pair(IK_CXX, "test.cc"));
  61   invocation->getFrontendOpts().ProgramAction = frontend::ParseSyntaxOnly;
  62   invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
  63   CompilerInstance compiler;
  64   compiler.setLLVMContext(new LLVMContext);
  65   compiler.setInvocation(invocation);
  66   compiler.createDiagnostics(0, NULL);
  67
  68   TestASTFrontendAction test_action;
  69   ASSERT_TRUE(compiler.ExecuteAction(test_action));
  70   ASSERT_EQ(3U, test_action.decl_names.size());
  71   EXPECT_EQ("__builtin_va_list", test_action.decl_names[0]);
  72   EXPECT_EQ("main", test_action.decl_names[1]);
  73   EXPECT_EQ("x", test_action.decl_names[2]);
  74 }
  75
  76 } // anonymous namespace