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//===-- ClangdUnitTests.cpp - ClangdUnit tests ------------------*- C++ -*-===//
//
// 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 "Annotations.h"
#include "ClangdUnit.h"
#include "SourceCode.h"
#include "TestTU.h"
#include "clang/Basic/TokenKinds.h"
#include "clang/Tooling/Syntax/Tokens.h"
#include "llvm/Support/ScopedPrinter.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace clang {
namespace clangd {
namespace {
using ::testing::ElementsAre;
TEST(ClangdUnitTest, GetBeginningOfIdentifier) {
std::string Preamble = R"cpp(
struct Bar { int func(); };
#define MACRO(X) void f() { X; }
Bar* bar;
)cpp";
// First ^ is the expected beginning, last is the search position.
for (std::string Text : std::vector<std::string>{
"int ^f^oo();", // inside identifier
"int ^foo();", // beginning of identifier
"int ^foo^();", // end of identifier
"int foo(^);", // non-identifier
"^int foo();", // beginning of file (can't back up)
"int ^f0^0();", // after a digit (lexing at N-1 is wrong)
"int ^λλ^λ();", // UTF-8 handled properly when backing up
// identifier in macro arg
"MACRO(bar->^func())", // beginning of identifier
"MACRO(bar->^fun^c())", // inside identifier
"MACRO(bar->^func^())", // end of identifier
"MACRO(^bar->func())", // begin identifier
"MACRO(^bar^->func())", // end identifier
"^MACRO(bar->func())", // beginning of macro name
"^MAC^RO(bar->func())", // inside macro name
"^MACRO^(bar->func())", // end of macro name
}) {
std::string WithPreamble = Preamble + Text;
Annotations TestCase(WithPreamble);
auto AST = TestTU::withCode(TestCase.code()).build();
const auto &SourceMgr = AST.getSourceManager();
SourceLocation Actual = getBeginningOfIdentifier(
AST, TestCase.points().back(), SourceMgr.getMainFileID());
Position ActualPos = offsetToPosition(
TestCase.code(),
SourceMgr.getFileOffset(SourceMgr.getSpellingLoc(Actual)));
EXPECT_EQ(TestCase.points().front(), ActualPos) << Text;
}
}
MATCHER_P(DeclNamed, Name, "") {
if (NamedDecl *ND = dyn_cast<NamedDecl>(arg))
if (ND->getName() == Name)
return true;
if (auto *Stream = result_listener->stream()) {
llvm::raw_os_ostream OS(*Stream);
arg->dump(OS);
}
return false;
}
TEST(ClangdUnitTest, TopLevelDecls) {
TestTU TU;
TU.HeaderCode = R"(
int header1();
int header2;
)";
TU.Code = "int main();";
auto AST = TU.build();
EXPECT_THAT(AST.getLocalTopLevelDecls(), ElementsAre(DeclNamed("main")));
}
TEST(ClangdUnitTest, DoesNotGetIncludedTopDecls) {
TestTU TU;
TU.HeaderCode = R"cpp(
#define LL void foo(){}
template<class T>
struct H {
H() {}
LL
};
)cpp";
TU.Code = R"cpp(
int main() {
H<int> h;
h.foo();
}
)cpp";
auto AST = TU.build();
EXPECT_THAT(AST.getLocalTopLevelDecls(), ElementsAre(DeclNamed("main")));
}
TEST(ClangdUnitTest, TokensAfterPreamble) {
TestTU TU;
TU.AdditionalFiles["foo.h"] = R"(
int foo();
)";
TU.Code = R"cpp(
#include "foo.h"
first_token;
void test() {
}
last_token
)cpp";
auto AST = TU.build();
const syntax::TokenBuffer &T = AST.getTokens();
const auto &SM = AST.getSourceManager();
ASSERT_GT(T.expandedTokens().size(), 2u);
// Check first token after the preamble.
EXPECT_EQ(T.expandedTokens().front().text(SM), "first_token");
// Last token is always 'eof'.
EXPECT_EQ(T.expandedTokens().back().kind(), tok::eof);
// Check the token before 'eof'.
EXPECT_EQ(T.expandedTokens().drop_back().back().text(SM), "last_token");
// The spelled tokens for the main file should have everything.
auto Spelled = T.spelledTokens(SM.getMainFileID());
ASSERT_FALSE(Spelled.empty());
EXPECT_EQ(Spelled.front().kind(), tok::hash);
EXPECT_EQ(Spelled.back().text(SM), "last_token");
}
TEST(ClangdUnitTest, NoCrashOnTokensWithTidyCheck) {
TestTU TU;
// this check runs the preprocessor, we need to make sure it does not break
// our recording logic.
TU.ClangTidyChecks = "modernize-use-trailing-return-type";
TU.Code = "inline int foo() {}";
auto AST = TU.build();
const syntax::TokenBuffer &T = AST.getTokens();
const auto &SM = AST.getSourceManager();
ASSERT_GT(T.expandedTokens().size(), 7u);
// Check first token after the preamble.
EXPECT_EQ(T.expandedTokens().front().text(SM), "inline");
// Last token is always 'eof'.
EXPECT_EQ(T.expandedTokens().back().kind(), tok::eof);
// Check the token before 'eof'.
EXPECT_EQ(T.expandedTokens().drop_back().back().text(SM), "}");
}
} // namespace
} // namespace clangd
} // namespace clang
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