forked from OSchip/llvm-project
114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
//===---- UsingInserterTest.cpp - clang-tidy ----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "../clang-tidy/utils/UsingInserter.h"
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#include "ClangTidyTest.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "gtest/gtest.h"
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namespace clang {
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namespace tidy {
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namespace utils {
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// Replace all function calls with calls to foo::func. Inserts using
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// declarations as necessary. This checker is for testing only. It
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// can only run on one test case (e.g. wih one SourceManager).
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class InsertUsingCheck : public clang::tidy::ClangTidyCheck {
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public:
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InsertUsingCheck(StringRef Name, ClangTidyContext *Context)
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:ClangTidyCheck(Name, Context) {}
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void registerMatchers(clang::ast_matchers::MatchFinder *Finder) override {
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Finder->addMatcher(clang::ast_matchers::callExpr().bind("foo"), this);
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}
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void
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check(const clang::ast_matchers::MatchFinder::MatchResult &Result) override {
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if (!Inserter)
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Inserter.reset(new UsingInserter(*Result.SourceManager));
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const auto *Call = Result.Nodes.getNodeAs<clang::CallExpr>("foo");
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assert(Call != nullptr && "Did not find node \"foo\"");
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auto Hint =
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Inserter->createUsingDeclaration(*Result.Context, *Call, "::foo::func");
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if (Hint.hasValue())
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diag(Call->getBeginLoc(), "Fix for testing") << Hint.getValue();
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diag(Call->getBeginLoc(), "insert call")
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<< clang::FixItHint::CreateReplacement(
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Call->getCallee()->getSourceRange(),
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Inserter->getShortName(*Result.Context, *Call, "::foo::func"));
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}
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private:
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std::unique_ptr<UsingInserter> Inserter;
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};
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template <typename Check>
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std::string runChecker(StringRef Code, unsigned ExpectedWarningCount) {
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std::map<StringRef, StringRef> AdditionalFileContents = {{"foo.h",
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"namespace foo {\n"
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"namespace bar {\n"
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"}\n"
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"void func() { }\n"
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"}"}};
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std::vector<ClangTidyError> errors;
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std::string result =
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test::runCheckOnCode<Check>(Code, &errors, "foo.cc", None,
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ClangTidyOptions(), AdditionalFileContents);
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EXPECT_EQ(ExpectedWarningCount, errors.size());
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return result;
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}
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TEST(UsingInserterTest, ReusesExisting) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"namespace {"
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"using ::foo::func;\n"
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"void f() { func(); }"
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"}",
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runChecker<InsertUsingCheck>("#include \"foo.h\"\n"
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"namespace {"
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"using ::foo::func;\n"
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"void f() { f(); }"
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"}",
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1));
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}
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TEST(UsingInserterTest, ReusesExistingGlobal) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"using ::foo::func;\n"
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"namespace {"
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"void f() { func(); }"
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"}",
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runChecker<InsertUsingCheck>("#include \"foo.h\"\n"
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"using ::foo::func;\n"
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"namespace {"
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"void f() { f(); }"
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"}",
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1));
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}
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TEST(UsingInserterTest, AvoidsConflict) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"namespace {"
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"void f() { int func; ::foo::func(); }"
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"}",
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runChecker<InsertUsingCheck>("#include \"foo.h\"\n"
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"namespace {"
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"void f() { int func; f(); }"
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"}",
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1));
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}
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} // namespace utils
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} // namespace tidy
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} // namespace clang
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