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llvm-project/clang/unittests/Tooling/HeaderIncludesTest.cpp

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//===- unittest/Tooling/CleanupTest.cpp - Include insertion/deletion tests ===//
//
// 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 "clang/Tooling/Inclusions/HeaderIncludes.h"
#include "../Tooling/ReplacementTest.h"
#include "../Tooling/RewriterTestContext.h"
#include "clang/Format/Format.h"
#include "clang/Tooling/Core/Replacement.h"
#include "gtest/gtest.h"
namespace clang {
namespace tooling {
namespace {
class HeaderIncludesTest : public ::testing::Test {
protected:
std::string insert(llvm::StringRef Code, llvm::StringRef Header) {
HeaderIncludes Includes(FileName, Code, Style);
assert(Header.startswith("\"") || Header.startswith("<"));
auto R = Includes.insert(Header.trim("\"<>"), Header.startswith("<"));
if (!R)
return Code;
auto Result = applyAllReplacements(Code, Replacements(*R));
EXPECT_TRUE(static_cast<bool>(Result));
return *Result;
}
std::string remove(llvm::StringRef Code, llvm::StringRef Header) {
HeaderIncludes Includes(FileName, Code, Style);
assert(Header.startswith("\"") || Header.startswith("<"));
auto Replaces = Includes.remove(Header.trim("\"<>"), Header.startswith("<"));
auto Result = applyAllReplacements(Code, Replaces);
EXPECT_TRUE(static_cast<bool>(Result));
return *Result;
}
const std::string FileName = "fix.cpp";
IncludeStyle Style = format::getLLVMStyle().IncludeStyle;
};
TEST_F(HeaderIncludesTest, NoExistingIncludeWithoutDefine) {
std::string Code = "int main() {}";
std::string Expected = "#include \"a.h\"\n"
"int main() {}";
EXPECT_EQ(Expected, insert(Code, "\"a.h\""));
}
TEST_F(HeaderIncludesTest, NoExistingIncludeWithDefine) {
std::string Code = "#ifndef A_H\n"
"#define A_H\n"
"class A {};\n"
"#define MMM 123\n"
"#endif";
std::string Expected = "#ifndef A_H\n"
"#define A_H\n"
"#include \"b.h\"\n"
"class A {};\n"
"#define MMM 123\n"
"#endif";
EXPECT_EQ(Expected, insert(Code, "\"b.h\""));
}
TEST_F(HeaderIncludesTest, InsertBeforeCategoryWithLowerPriority) {
std::string Code = "#ifndef A_H\n"
"#define A_H\n"
"\n"
"\n"
"\n"
"#include <vector>\n"
"class A {};\n"
"#define MMM 123\n"
"#endif";
std::string Expected = "#ifndef A_H\n"
"#define A_H\n"
"\n"
"\n"
"\n"
"#include \"a.h\"\n"
"#include <vector>\n"
"class A {};\n"
"#define MMM 123\n"
"#endif";
EXPECT_EQ(Expected, insert(Code, "\"a.h\""));
}
TEST_F(HeaderIncludesTest, InsertAfterMainHeader) {
std::string Code = "#include \"fix.h\"\n"
"\n"
"int main() {}";
std::string Expected = "#include \"fix.h\"\n"
"#include <a>\n"
"\n"
"int main() {}";
Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp)
.IncludeStyle;
EXPECT_EQ(Expected, insert(Code, "<a>"));
}
TEST_F(HeaderIncludesTest, InsertBeforeSystemHeaderLLVM) {
std::string Code = "#include <memory>\n"
"\n"
"int main() {}";
std::string Expected = "#include \"z.h\"\n"
"#include <memory>\n"
"\n"
"int main() {}";
EXPECT_EQ(Expected, insert(Code, "\"z.h\""));
}
TEST_F(HeaderIncludesTest, InsertAfterSystemHeaderGoogle) {
std::string Code = "#include <memory>\n"
"\n"
"int main() {}";
std::string Expected = "#include <memory>\n"
"#include \"z.h\"\n"
"\n"
"int main() {}";
Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp)
.IncludeStyle;
EXPECT_EQ(Expected, insert(Code, "\"z.h\""));
}
TEST_F(HeaderIncludesTest, InsertOneIncludeLLVMStyle) {
std::string Code = "#include \"x/fix.h\"\n"
"#include \"a.h\"\n"
"#include \"b.h\"\n"
"#include \"clang/Format/Format.h\"\n"
"#include <memory>\n";
std::string Expected = "#include \"x/fix.h\"\n"
"#include \"a.h\"\n"
"#include \"b.h\"\n"
"#include \"clang/Format/Format.h\"\n"
"#include \"llvm/x/y.h\"\n"
"#include <memory>\n";
EXPECT_EQ(Expected, insert(Code, "\"llvm/x/y.h\""));
}
TEST_F(HeaderIncludesTest, InsertIntoBlockSorted) {
std::string Code = "#include \"x/fix.h\"\n"
"#include \"a.h\"\n"
"#include \"c.h\"\n"
"#include <memory>\n";
std::string Expected = "#include \"x/fix.h\"\n"
"#include \"a.h\"\n"
"#include \"b.h\"\n"
"#include \"c.h\"\n"
"#include <memory>\n";
EXPECT_EQ(Expected, insert(Code, "\"b.h\""));
}
TEST_F(HeaderIncludesTest, InsertIntoFirstBlockOfSameKind) {
std::string Code = "#include \"x/fix.h\"\n"
"#include \"c.h\"\n"
"#include \"e.h\"\n"
"#include \"f.h\"\n"
"#include <memory>\n"
"#include <vector>\n"
"#include \"m.h\"\n"
"#include \"n.h\"\n";
std::string Expected = "#include \"x/fix.h\"\n"
"#include \"c.h\"\n"
"#include \"d.h\"\n"
"#include \"e.h\"\n"
"#include \"f.h\"\n"
"#include <memory>\n"
"#include <vector>\n"
"#include \"m.h\"\n"
"#include \"n.h\"\n";
EXPECT_EQ(Expected, insert(Code, "\"d.h\""));
}
TEST_F(HeaderIncludesTest, InsertIntoSystemBlockSorted) {
std::string Code = "#include \"x/fix.h\"\n"
"#include \"a.h\"\n"
"#include \"c.h\"\n"
"#include <a>\n"
"#include <z>\n";
std::string Expected = "#include \"x/fix.h\"\n"
"#include \"a.h\"\n"
"#include \"c.h\"\n"
"#include <a>\n"
"#include <vector>\n"
"#include <z>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, InsertNewSystemIncludeGoogleStyle) {
std::string Code = "#include \"x/fix.h\"\n"
"\n"
"#include \"y/a.h\"\n"
"#include \"z/b.h\"\n";
// FIXME: inserting after the empty line following the main header might be
// preferred.
std::string Expected = "#include \"x/fix.h\"\n"
"#include <vector>\n"
"\n"
"#include \"y/a.h\"\n"
"#include \"z/b.h\"\n";
Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp)
.IncludeStyle;
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, NotConfusedByDefine) {
std::string Code = "void f() {}\n"
"#define A \\\n"
" int i;";
std::string Expected = "#include <vector>\n"
"void f() {}\n"
"#define A \\\n"
" int i;";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, SkippedTopComment) {
std::string Code = "// comment\n"
"\n"
" // comment\n";
std::string Expected = "// comment\n"
"\n"
" // comment\n"
"#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, SkippedMixedComments) {
std::string Code = "// comment\n"
"// comment \\\n"
" comment continued\n"
"/*\n"
"* comment\n"
"*/\n";
std::string Expected = "// comment\n"
"// comment \\\n"
" comment continued\n"
"/*\n"
"* comment\n"
"*/\n"
"#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, MultipleBlockCommentsInOneLine) {
std::string Code = "/*\n"
"* comment\n"
"*/ /* comment\n"
"*/\n"
"\n\n"
"/* c1 */ /*c2 */\n";
std::string Expected = "/*\n"
"* comment\n"
"*/ /* comment\n"
"*/\n"
"\n\n"
"/* c1 */ /*c2 */\n"
"#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, CodeAfterComments) {
std::string Code = "/*\n"
"* comment\n"
"*/ /* comment\n"
"*/\n"
"\n\n"
"/* c1 */ /*c2 */\n"
"\n"
"int x;\n";
std::string Expected = "/*\n"
"* comment\n"
"*/ /* comment\n"
"*/\n"
"\n\n"
"/* c1 */ /*c2 */\n"
"\n"
"#include <vector>\n"
"int x;\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, FakeHeaderGuardIfDef) {
std::string Code = "// comment \n"
"#ifdef X\n"
"#define X\n";
std::string Expected = "// comment \n"
"#include <vector>\n"
"#ifdef X\n"
"#define X\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, RealHeaderGuardAfterComments) {
std::string Code = "// comment \n"
"#ifndef X\n"
"#define X\n"
"int x;\n"
"#define Y 1\n";
std::string Expected = "// comment \n"
"#ifndef X\n"
"#define X\n"
"#include <vector>\n"
"int x;\n"
"#define Y 1\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, PragmaOnce) {
std::string Code = "// comment \n"
"#pragma once\n"
"int x;\n";
std::string Expected = "// comment \n"
"#pragma once\n"
"#include <vector>\n"
"int x;\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, IfNDefWithNoDefine) {
std::string Code = "// comment \n"
"#ifndef X\n"
"int x;\n"
"#define Y 1\n";
std::string Expected = "// comment \n"
"#include <vector>\n"
"#ifndef X\n"
"int x;\n"
"#define Y 1\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, FakeHeaderGuard) {
std::string Code = "// comment \n"
"#ifndef X\n"
"#define 1\n";
std::string Expected = "// comment \n"
"#include <vector>\n"
"#ifndef X\n"
"#define 1\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, HeaderGuardWithComment) {
std::string Code = "// comment \n"
"#ifndef X // comment\n"
"// comment\n"
"/* comment\n"
"*/\n"
"/* comment */ #define X\n"
"int x;\n"
"#define Y 1\n";
std::string Expected = "// comment \n"
"#ifndef X // comment\n"
"// comment\n"
"/* comment\n"
"*/\n"
"/* comment */ #define X\n"
"#include <vector>\n"
"int x;\n"
"#define Y 1\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, EmptyCode) {
std::string Code = "";
std::string Expected = "#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, NoNewLineAtTheEndOfCode) {
std::string Code = "#include <map>";
std::string Expected = "#include <map>\n#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
}
TEST_F(HeaderIncludesTest, SkipExistingHeaders) {
std::string Code = "#include \"a.h\"\n"
"#include <vector>\n";
std::string Expected = "#include \"a.h\"\n"
"#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "<vector>"));
EXPECT_EQ(Expected, insert(Code, "\"a.h\""));
}
TEST_F(HeaderIncludesTest, AddIncludesWithDifferentForms) {
std::string Code = "#include <vector>\n";
// FIXME: this might not be the best behavior.
std::string Expected = "#include \"vector\"\n"
"#include <vector>\n";
EXPECT_EQ(Expected, insert(Code, "\"vector\""));
}
TEST_F(HeaderIncludesTest, NoInsertionAfterCode) {
std::string Code = "#include \"a.h\"\n"
"void f() {}\n"
"#include \"b.h\"\n";
std::string Expected = "#include \"a.h\"\n"
"#include \"c.h\"\n"
"void f() {}\n"
"#include \"b.h\"\n";
EXPECT_EQ(Expected, insert(Code, "\"c.h\""));
}
TEST_F(HeaderIncludesTest, NoInsertionInStringLiteral) {
std::string Code = "#include \"a.h\"\n"
"const char[] = R\"(\n"
"#include \"b.h\"\n"
")\";\n";
std::string Expected = "#include \"a.h\"\n"
"#include \"c.h\"\n"
"const char[] = R\"(\n"
"#include \"b.h\"\n"
")\";\n";
EXPECT_EQ(Expected, insert(Code, "\"c.h\""));
}
TEST_F(HeaderIncludesTest, NoInsertionAfterOtherDirective) {
std::string Code = "#include \"a.h\"\n"
"#ifdef X\n"
"#include \"b.h\"\n"
"#endif\n";
std::string Expected = "#include \"a.h\"\n"
"#include \"c.h\"\n"
"#ifdef X\n"
"#include \"b.h\"\n"
"#endif\n";
EXPECT_EQ(Expected, insert(Code, "\"c.h\""));
}
TEST_F(HeaderIncludesTest, CanInsertAfterLongSystemInclude) {
std::string Code = "#include \"a.h\"\n"
"// comment\n\n"
"#include <a/b/c/d/e.h>\n";
std::string Expected = "#include \"a.h\"\n"
"// comment\n\n"
"#include <a/b/c/d/e.h>\n"
"#include <x.h>\n";
EXPECT_EQ(Expected, insert(Code, "<x.h>"));
}
TEST_F(HeaderIncludesTest, CanInsertAfterComment) {
std::string Code = "#include \"a.h\"\n"
"// Comment\n"
"\n"
"/* Comment */\n"
"// Comment\n"
"\n"
"#include \"b.h\"\n";
std::string Expected = "#include \"a.h\"\n"
"// Comment\n"
"\n"
"/* Comment */\n"
"// Comment\n"
"\n"
"#include \"b.h\"\n"
"#include \"c.h\"\n";
EXPECT_EQ(Expected, insert(Code, "\"c.h\""));
}
TEST_F(HeaderIncludesTest, LongCommentsInTheBeginningOfFile) {
std::string Code = "// Loooooooooooooooooooooooooong comment\n"
"// Loooooooooooooooooooooooooong comment\n"
"// Loooooooooooooooooooooooooong comment\n"
"#include <string>\n"
"#include <vector>\n"
"\n"
"#include \"a.h\"\n"
"#include \"b.h\"\n";
std::string Expected = "// Loooooooooooooooooooooooooong comment\n"
"// Loooooooooooooooooooooooooong comment\n"
"// Loooooooooooooooooooooooooong comment\n"
"#include <string>\n"
"#include <vector>\n"
"\n"
"#include \"a.h\"\n"
"#include \"b.h\"\n"
"#include \"third.h\"\n";
Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp)
.IncludeStyle;
EXPECT_EQ(Expected, insert(Code, "\"third.h\""));
}
TEST_F(HeaderIncludesTest, SimpleDeleteInclude) {
std::string Code = "#include \"abc.h\"\n"
"#include \"xyz.h\" // comment\n"
"int x;\n";
std::string Expected = "#include \"abc.h\"\n"
"int x;\n";
EXPECT_EQ(Expected, remove(Code, "\"xyz.h\""));
}
TEST_F(HeaderIncludesTest, DeleteQuotedOnly) {
std::string Code = "#include \"abc.h\"\n"
"#include <abc.h>\n"
"int x;\n";
std::string Expected = "#include <abc.h>\n"
"int x;\n";
EXPECT_EQ(Expected, remove(Code, "\"abc.h\""));
}
TEST_F(HeaderIncludesTest, DeleteAllCode) {
std::string Code = "#include \"xyz.h\"\n";
std::string Expected = "";
EXPECT_EQ(Expected, remove(Code, "\"xyz.h\""));
}
TEST_F(HeaderIncludesTest, DeleteOnlyIncludesWithSameQuote) {
std::string Code = "#include \"xyz.h\"\n"
"#include \"xyz\"\n"
"#include <xyz.h>\n";
std::string Expected = "#include \"xyz.h\"\n"
"#include \"xyz\"\n";
EXPECT_EQ(Expected, remove(Code, "<xyz.h>"));
}
TEST_F(HeaderIncludesTest, CanDeleteAfterCode) {
std::string Code = "#include \"a.h\"\n"
"void f() {}\n"
"#include \"b.h\"\n";
std::string Expected = "#include \"a.h\"\n"
"void f() {}\n";
EXPECT_EQ(Expected, remove(Code, "\"b.h\""));
}
} // namespace
} // namespace tooling
} // namespace clang
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