| //===---- UsingInserterTest.cpp - clang-tidy ----------------------------===// |
| // |
| // 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 "../clang-tidy/utils/UsingInserter.h" |
| |
| #include "ClangTidyTest.h" |
| #include "clang/ASTMatchers/ASTMatchFinder.h" |
| #include "clang/ASTMatchers/ASTMatchers.h" |
| #include "gtest/gtest.h" |
| |
| namespace clang { |
| namespace tidy { |
| namespace utils { |
| |
| // Replace all function calls with calls to foo::func. Inserts using |
| // declarations as necessary. This checker is for testing only. It |
| // can only run on one test case (e.g. wih one SourceManager). |
| class InsertUsingCheck : public clang::tidy::ClangTidyCheck { |
| public: |
| InsertUsingCheck(StringRef Name, ClangTidyContext *Context) |
| :ClangTidyCheck(Name, Context) {} |
| void registerMatchers(clang::ast_matchers::MatchFinder *Finder) override { |
| Finder->addMatcher(clang::ast_matchers::callExpr().bind("foo"), this); |
| } |
| void |
| check(const clang::ast_matchers::MatchFinder::MatchResult &Result) override { |
| if (!Inserter) |
| Inserter.reset(new UsingInserter(*Result.SourceManager)); |
| |
| const auto *Call = Result.Nodes.getNodeAs<clang::CallExpr>("foo"); |
| assert(Call != nullptr && "Did not find node \"foo\""); |
| auto Hint = |
| Inserter->createUsingDeclaration(*Result.Context, *Call, "::foo::func"); |
| |
| if (Hint.hasValue()) |
| diag(Call->getBeginLoc(), "Fix for testing") << Hint.getValue(); |
| |
| diag(Call->getBeginLoc(), "insert call") |
| << clang::FixItHint::CreateReplacement( |
| Call->getCallee()->getSourceRange(), |
| Inserter->getShortName(*Result.Context, *Call, "::foo::func")); |
| } |
| |
| private: |
| std::unique_ptr<UsingInserter> Inserter; |
| }; |
| |
| template <typename Check> |
| std::string runChecker(StringRef Code, unsigned ExpectedWarningCount) { |
| std::map<StringRef, StringRef> AdditionalFileContents = {{"foo.h", |
| "namespace foo {\n" |
| "namespace bar {\n" |
| "}\n" |
| "void func() { }\n" |
| "}"}}; |
| std::vector<ClangTidyError> errors; |
| |
| std::string result = |
| test::runCheckOnCode<Check>(Code, &errors, "foo.cc", None, |
| ClangTidyOptions(), AdditionalFileContents); |
| |
| EXPECT_EQ(ExpectedWarningCount, errors.size()); |
| return result; |
| } |
| |
| TEST(UsingInserterTest, ReusesExisting) { |
| EXPECT_EQ("#include \"foo.h\"\n" |
| "namespace {" |
| "using ::foo::func;\n" |
| "void f() { func(); }" |
| "}", |
| runChecker<InsertUsingCheck>("#include \"foo.h\"\n" |
| "namespace {" |
| "using ::foo::func;\n" |
| "void f() { f(); }" |
| "}", |
| 1)); |
| } |
| |
| TEST(UsingInserterTest, ReusesExistingGlobal) { |
| EXPECT_EQ("#include \"foo.h\"\n" |
| "using ::foo::func;\n" |
| "namespace {" |
| "void f() { func(); }" |
| "}", |
| runChecker<InsertUsingCheck>("#include \"foo.h\"\n" |
| "using ::foo::func;\n" |
| "namespace {" |
| "void f() { f(); }" |
| "}", |
| 1)); |
| } |
| |
| TEST(UsingInserterTest, AvoidsConflict) { |
| EXPECT_EQ("#include \"foo.h\"\n" |
| "namespace {" |
| "void f() { int func; ::foo::func(); }" |
| "}", |
| runChecker<InsertUsingCheck>("#include \"foo.h\"\n" |
| "namespace {" |
| "void f() { int func; f(); }" |
| "}", |
| 1)); |
| } |
| |
| } // namespace utils |
| } // namespace tidy |
| } // namespace clang |