121 lines
4.5 KiB
C++
121 lines
4.5 KiB
C++
//===---- NamespaceAliaserTest.cpp - clang-tidy
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//----------------------------===//
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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/NamespaceAliaser.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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// This checker is for testing only. It can only run on one test case
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// (e.g. with one SourceManager).
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class InsertAliasCheck : public ClangTidyCheck {
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public:
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InsertAliasCheck(StringRef Name, ClangTidyContext *Context)
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:ClangTidyCheck(Name, Context) {}
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void registerMatchers(ast_matchers::MatchFinder *Finder) override {
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Finder->addMatcher(ast_matchers::callExpr().bind("foo"), this);
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}
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void check(const ast_matchers::MatchFinder::MatchResult &Result) override {
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if (!Aliaser)
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Aliaser.reset(new NamespaceAliaser(*Result.SourceManager));
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const auto *Call = Result.Nodes.getNodeAs<CallExpr>("foo");
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assert(Call != nullptr && "Did not find node \"foo\"");
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auto Hint = Aliaser->createAlias(*Result.Context, *Call, "::foo::bar",
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{"b", "some_alias"});
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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") << FixItHint::CreateInsertion(
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Call->getBeginLoc(),
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Aliaser->getNamespaceName(*Result.Context, *Call, "::foo::bar") + "::");
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}
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private:
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std::unique_ptr<NamespaceAliaser> Aliaser;
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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(NamespaceAliaserTest, AddNewAlias) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"void f() {\n"
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"namespace b = ::foo::bar;"
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" b::f(); }",
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runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
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"void f() { f(); }",
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2));
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}
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TEST(NamespaceAliaserTest, ReuseAlias) {
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EXPECT_EQ(
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"#include \"foo.h\"\n"
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"void f() { namespace x = foo::bar; x::f(); }",
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runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
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"void f() { namespace x = foo::bar; f(); }",
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1));
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}
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TEST(NamespaceAliaserTest, AddsOnlyOneAlias) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"void f() {\n"
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"namespace b = ::foo::bar;"
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" b::f(); b::f(); }",
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runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
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"void f() { f(); f(); }",
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3));
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}
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TEST(NamespaceAliaserTest, LocalConflict) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"void f() {\n"
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"namespace some_alias = ::foo::bar;"
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" namespace b = foo; some_alias::f(); }",
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runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
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"void f() { namespace b = foo; f(); }",
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2));
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}
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TEST(NamespaceAliaserTest, GlobalConflict) {
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EXPECT_EQ("#include \"foo.h\"\n"
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"namespace b = foo;\n"
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"void f() {\n"
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"namespace some_alias = ::foo::bar;"
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" some_alias::f(); }",
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runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
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"namespace b = foo;\n"
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"void f() { f(); }",
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2));
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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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