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//===---- NamespaceAliaserTest.cpp - clang-tidy
//----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "../clang-tidy/utils/NamespaceAliaser.h"
#include "ClangTidyTest.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "gtest/gtest.h"
namespace clang {
namespace tidy {
namespace utils {
// This checker is for testing only. It can only run on one test case
// (e.g. with one SourceManager).
class InsertAliasCheck : public ClangTidyCheck {
public:
InsertAliasCheck(StringRef Name, ClangTidyContext *Context)
:ClangTidyCheck(Name, Context) {}
void registerMatchers(ast_matchers::MatchFinder *Finder) override {
Finder->addMatcher(ast_matchers::callExpr().bind("foo"), this);
}
void check(const ast_matchers::MatchFinder::MatchResult &Result) override {
if (!Aliaser)
Aliaser.reset(new NamespaceAliaser(*Result.SourceManager));
const auto *Call = Result.Nodes.getNodeAs<CallExpr>("foo");
assert(Call != nullptr && "Did not find node \"foo\"");
auto Hint = Aliaser->createAlias(*Result.Context, *Call, "::foo::bar",
{"b", "some_alias"});
if (Hint.hasValue())
diag(Call->getLocStart(), "Fix for testing") << Hint.getValue();
diag(Call->getLocStart(), "insert call")
<< FixItHint::CreateInsertion(
Call->getLocStart(),
Aliaser->getNamespaceName(*Result.Context, *Call, "::foo::bar") +
"::");
}
private:
std::unique_ptr<NamespaceAliaser> Aliaser;
};
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(NamespaceAliaserTest, AddNewAlias) {
EXPECT_EQ("#include \"foo.h\"\n"
"void f() {\n"
"namespace b = ::foo::bar;"
" b::f(); }",
runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
"void f() { f(); }",
2));
}
TEST(NamespaceAliaserTest, ReuseAlias) {
EXPECT_EQ(
"#include \"foo.h\"\n"
"void f() { namespace x = foo::bar; x::f(); }",
runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
"void f() { namespace x = foo::bar; f(); }",
1));
}
TEST(NamespaceAliaserTest, AddsOnlyOneAlias) {
EXPECT_EQ("#include \"foo.h\"\n"
"void f() {\n"
"namespace b = ::foo::bar;"
" b::f(); b::f(); }",
runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
"void f() { f(); f(); }",
3));
}
TEST(NamespaceAliaserTest, LocalConflict) {
EXPECT_EQ("#include \"foo.h\"\n"
"void f() {\n"
"namespace some_alias = ::foo::bar;"
" namespace b = foo; some_alias::f(); }",
runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
"void f() { namespace b = foo; f(); }",
2));
}
TEST(NamespaceAliaserTest, GlobalConflict) {
EXPECT_EQ("#include \"foo.h\"\n"
"namespace b = foo;\n"
"void f() {\n"
"namespace some_alias = ::foo::bar;"
" some_alias::f(); }",
runChecker<InsertAliasCheck>("#include \"foo.h\"\n"
"namespace b = foo;\n"
"void f() { f(); }",
2));
}
} // namespace utils
} // namespace tidy
} // namespace clang
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