120 lines · cpp
1//===---- NamespaceAliaserTest.cpp - clang-tidy2//----------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#include "../clang-tidy/utils/NamespaceAliaser.h"11 12#include "ClangTidyTest.h"13#include "clang/ASTMatchers/ASTMatchFinder.h"14#include "clang/ASTMatchers/ASTMatchers.h"15#include "gtest/gtest.h"16 17namespace clang {18namespace tidy {19namespace utils {20// This checker is for testing only. It can only run on one test case21// (e.g. with one SourceManager).22class InsertAliasCheck : public ClangTidyCheck {23public:24 InsertAliasCheck(StringRef Name, ClangTidyContext *Context)25 :ClangTidyCheck(Name, Context) {}26 void registerMatchers(ast_matchers::MatchFinder *Finder) override {27 Finder->addMatcher(ast_matchers::callExpr().bind("foo"), this);28 }29 void check(const ast_matchers::MatchFinder::MatchResult &Result) override {30 if (!Aliaser)31 Aliaser.reset(new NamespaceAliaser(*Result.SourceManager));32 33 const auto *Call = Result.Nodes.getNodeAs<CallExpr>("foo");34 assert(Call != nullptr && "Did not find node \"foo\"");35 auto Hint = Aliaser->createAlias(*Result.Context, *Call, "::foo::bar",36 {"b", "some_alias"});37 if (Hint)38 diag(Call->getBeginLoc(), "Fix for testing") << *Hint;39 40 diag(Call->getBeginLoc(), "insert call") << FixItHint::CreateInsertion(41 Call->getBeginLoc(),42 Aliaser->getNamespaceName(*Result.Context, *Call, "::foo::bar") + "::");43 }44 45private:46 std::unique_ptr<NamespaceAliaser> Aliaser;47};48 49template <typename Check>50std::string runChecker(StringRef Code, unsigned ExpectedWarningCount) {51 std::map<StringRef, StringRef> AdditionalFileContents = {{"foo.h",52 "namespace foo {\n"53 "namespace bar {\n"54 "}\n"55 "void func() { }\n"56 "}"}};57 std::vector<ClangTidyError> errors;58 59 std::string result = test::runCheckOnCode<Check>(60 Code, &errors, "foo.cc", {}, ClangTidyOptions(), AdditionalFileContents);61 62 EXPECT_EQ(ExpectedWarningCount, errors.size());63 return result;64}65 66TEST(NamespaceAliaserTest, AddNewAlias) {67 EXPECT_EQ("#include \"foo.h\"\n"68 "void f() {\n"69 "namespace b = ::foo::bar;"70 " b::f(); }",71 runChecker<InsertAliasCheck>("#include \"foo.h\"\n"72 "void f() { f(); }",73 2));74}75 76TEST(NamespaceAliaserTest, ReuseAlias) {77 EXPECT_EQ(78 "#include \"foo.h\"\n"79 "void f() { namespace x = foo::bar; x::f(); }",80 runChecker<InsertAliasCheck>("#include \"foo.h\"\n"81 "void f() { namespace x = foo::bar; f(); }",82 1));83}84 85TEST(NamespaceAliaserTest, AddsOnlyOneAlias) {86 EXPECT_EQ("#include \"foo.h\"\n"87 "void f() {\n"88 "namespace b = ::foo::bar;"89 " b::f(); b::f(); }",90 runChecker<InsertAliasCheck>("#include \"foo.h\"\n"91 "void f() { f(); f(); }",92 3));93}94 95TEST(NamespaceAliaserTest, LocalConflict) {96 EXPECT_EQ("#include \"foo.h\"\n"97 "void f() {\n"98 "namespace some_alias = ::foo::bar;"99 " namespace b = foo; some_alias::f(); }",100 runChecker<InsertAliasCheck>("#include \"foo.h\"\n"101 "void f() { namespace b = foo; f(); }",102 2));103}104 105TEST(NamespaceAliaserTest, GlobalConflict) {106 EXPECT_EQ("#include \"foo.h\"\n"107 "namespace b = foo;\n"108 "void f() {\n"109 "namespace some_alias = ::foo::bar;"110 " some_alias::f(); }",111 runChecker<InsertAliasCheck>("#include \"foo.h\"\n"112 "namespace b = foo;\n"113 "void f() { f(); }",114 2));115}116 117} // namespace utils118} // namespace tidy119} // namespace clang120