1 //===---- UsingInserterTest.cpp - clang-tidy ----------------------------===// 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-tidy/utils/UsingInserter.h" 11 12 #include "ClangTidyTest.h" 13 #include "clang/ASTMatchers/ASTMatchFinder.h" 14 #include "clang/ASTMatchers/ASTMatchers.h" 15 #include "gtest/gtest.h" 16 17 namespace clang { 18 namespace tidy { 19 namespace utils { 20 21 // Replace all function calls with calls to foo::func. Inserts using 22 // declarations as necessary. This checker is for testing only. It 23 // can only run on one test case (e.g. wih one SourceManager). 24 class InsertUsingCheck : public clang::tidy::ClangTidyCheck { 25 public: 26 InsertUsingCheck(StringRef Name, ClangTidyContext *Context) 27 :ClangTidyCheck(Name, Context) {} 28 void registerMatchers(clang::ast_matchers::MatchFinder *Finder) override { 29 Finder->addMatcher(clang::ast_matchers::callExpr().bind("foo"), this); 30 } 31 void 32 check(const clang::ast_matchers::MatchFinder::MatchResult &Result) override { 33 if (!Inserter) 34 Inserter.reset(new UsingInserter(*Result.SourceManager)); 35 36 const auto *Call = Result.Nodes.getNodeAs<clang::CallExpr>("foo"); 37 assert(Call != nullptr && "Did not find node \"foo\""); 38 auto Hint = 39 Inserter->createUsingDeclaration(*Result.Context, *Call, "::foo::func"); 40 41 if (Hint.hasValue()) 42 diag(Call->getBeginLoc(), "Fix for testing") << Hint.getValue(); 43 44 diag(Call->getBeginLoc(), "insert call") 45 << clang::FixItHint::CreateReplacement( 46 Call->getCallee()->getSourceRange(), 47 Inserter->getShortName(*Result.Context, *Call, "::foo::func")); 48 } 49 50 private: 51 std::unique_ptr<UsingInserter> Inserter; 52 }; 53 54 template <typename Check> 55 std::string runChecker(StringRef Code, unsigned ExpectedWarningCount) { 56 std::map<StringRef, StringRef> AdditionalFileContents = {{"foo.h", 57 "namespace foo {\n" 58 "namespace bar {\n" 59 "}\n" 60 "void func() { }\n" 61 "}"}}; 62 std::vector<ClangTidyError> errors; 63 64 std::string result = 65 test::runCheckOnCode<Check>(Code, &errors, "foo.cc", None, 66 ClangTidyOptions(), AdditionalFileContents); 67 68 EXPECT_EQ(ExpectedWarningCount, errors.size()); 69 return result; 70 } 71 72 TEST(UsingInserterTest, ReusesExisting) { 73 EXPECT_EQ("#include \"foo.h\"\n" 74 "namespace {" 75 "using ::foo::func;\n" 76 "void f() { func(); }" 77 "}", 78 runChecker<InsertUsingCheck>("#include \"foo.h\"\n" 79 "namespace {" 80 "using ::foo::func;\n" 81 "void f() { f(); }" 82 "}", 83 1)); 84 } 85 86 TEST(UsingInserterTest, ReusesExistingGlobal) { 87 EXPECT_EQ("#include \"foo.h\"\n" 88 "using ::foo::func;\n" 89 "namespace {" 90 "void f() { func(); }" 91 "}", 92 runChecker<InsertUsingCheck>("#include \"foo.h\"\n" 93 "using ::foo::func;\n" 94 "namespace {" 95 "void f() { f(); }" 96 "}", 97 1)); 98 } 99 100 TEST(UsingInserterTest, AvoidsConflict) { 101 EXPECT_EQ("#include \"foo.h\"\n" 102 "namespace {" 103 "void f() { int func; ::foo::func(); }" 104 "}", 105 runChecker<InsertUsingCheck>("#include \"foo.h\"\n" 106 "namespace {" 107 "void f() { int func; f(); }" 108 "}", 109 1)); 110 } 111 112 } // namespace utils 113 } // namespace tidy 114 } // namespace clang 115