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llvm-project/clang-tools-extra/unittests/clang-include-fixer/IncludeFixerTest.cpp

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//===-- IncludeFixerTest.cpp - Include fixer unit 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 "InMemorySymbolIndex.h"
#include "IncludeFixer.h"
#include "SymbolIndexManager.h"
#include "unittests/Tooling/RewriterTestContext.h"
#include "clang/Tooling/Tooling.h"
#include "gtest/gtest.h"
namespace clang {
namespace include_fixer {
namespace {
using find_all_symbols::SymbolInfo;
using find_all_symbols::SymbolAndSignals;
static bool runOnCode(tooling::ToolAction *ToolAction, StringRef Code,
StringRef FileName,
const std::vector<std::string> &ExtraArgs) {
llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
new llvm::vfs::InMemoryFileSystem);
llvm::IntrusiveRefCntPtr<FileManager> Files(
new FileManager(FileSystemOptions(), InMemoryFileSystem));
// FIXME: Investigate why -fms-compatibility breaks tests.
std::vector<std::string> Args = {"include_fixer", "-fsyntax-only",
"-fno-ms-compatibility",
std::string(FileName)};
Args.insert(Args.end(), ExtraArgs.begin(), ExtraArgs.end());
tooling::ToolInvocation Invocation(
Args, ToolAction, Files.get(),
std::make_shared<PCHContainerOperations>());
InMemoryFileSystem->addFile(FileName, 0,
llvm::MemoryBuffer::getMemBuffer(Code));
InMemoryFileSystem->addFile("foo.h", 0,
llvm::MemoryBuffer::getMemBuffer("\n"));
InMemoryFileSystem->addFile("dir/bar.h", 0,
llvm::MemoryBuffer::getMemBuffer("\n"));
InMemoryFileSystem->addFile("dir/otherdir/qux.h", 0,
llvm::MemoryBuffer::getMemBuffer("\n"));
InMemoryFileSystem->addFile("header.h", 0,
llvm::MemoryBuffer::getMemBuffer("bar b;"));
return Invocation.run();
}
static std::string runIncludeFixer(
StringRef Code,
const std::vector<std::string> &ExtraArgs = std::vector<std::string>()) {
std::vector<SymbolAndSignals> Symbols = {
{SymbolInfo("string", SymbolInfo::SymbolKind::Class, "<string>",
{{SymbolInfo::ContextType::Namespace, "std"}}),
SymbolInfo::Signals{}},
{SymbolInfo("sting", SymbolInfo::SymbolKind::Class, "\"sting\"",
{{SymbolInfo::ContextType::Namespace, "std"}}),
SymbolInfo::Signals{}},
{SymbolInfo("foo", SymbolInfo::SymbolKind::Class,
"\"dir/otherdir/qux.h\"",
{{SymbolInfo::ContextType::Namespace, "b"},
{SymbolInfo::ContextType::Namespace, "a"}}),
SymbolInfo::Signals{}},
{SymbolInfo("bar", SymbolInfo::SymbolKind::Class, "\"bar.h\"",
{{SymbolInfo::ContextType::Namespace, "b"},
{SymbolInfo::ContextType::Namespace, "a"}}),
SymbolInfo::Signals{}},
{SymbolInfo("bar", SymbolInfo::SymbolKind::Class, "\"bar2.h\"",
{{SymbolInfo::ContextType::Namespace, "c"},
{SymbolInfo::ContextType::Namespace, "a"}}),
SymbolInfo::Signals{}},
{SymbolInfo("Green", SymbolInfo::SymbolKind::Class, "\"color.h\"",
{{SymbolInfo::ContextType::EnumDecl, "Color"},
{SymbolInfo::ContextType::Namespace, "b"},
{SymbolInfo::ContextType::Namespace, "a"}}),
SymbolInfo::Signals{}},
{SymbolInfo("Vector", SymbolInfo::SymbolKind::Class, "\"Vector.h\"",
{{SymbolInfo::ContextType::Namespace, "__a"},
{SymbolInfo::ContextType::Namespace, "a"}}),
SymbolInfo::Signals{/*Seen=*/2, 0}},
{SymbolInfo("Vector", SymbolInfo::SymbolKind::Class, "\"Vector.h\"",
{{SymbolInfo::ContextType::Namespace, "a"}}),
SymbolInfo::Signals{/*Seen=*/2, 0}},
{SymbolInfo("StrCat", SymbolInfo::SymbolKind::Class, "\"strcat.h\"",
{{SymbolInfo::ContextType::Namespace, "str"}}),
SymbolInfo::Signals{}},
{SymbolInfo("str", SymbolInfo::SymbolKind::Class, "\"str.h\"", {}),
SymbolInfo::Signals{}},
{SymbolInfo("foo2", SymbolInfo::SymbolKind::Class, "\"foo2.h\"", {}),
SymbolInfo::Signals{}},
};
auto SymbolIndexMgr = std::make_unique<SymbolIndexManager>();
SymbolIndexMgr->addSymbolIndex(
[=]() { return std::make_unique<InMemorySymbolIndex>(Symbols); });
std::vector<IncludeFixerContext> FixerContexts;
IncludeFixerActionFactory Factory(*SymbolIndexMgr, FixerContexts, "llvm");
std::string FakeFileName = "input.cc";
runOnCode(&Factory, Code, FakeFileName, ExtraArgs);
assert(FixerContexts.size() == 1);
if (FixerContexts.front().getHeaderInfos().empty())
return std::string(Code);
auto Replaces = createIncludeFixerReplacements(Code, FixerContexts.front());
EXPECT_TRUE(static_cast<bool>(Replaces))
<< llvm::toString(Replaces.takeError()) << "\n";
if (!Replaces)
return "";
RewriterTestContext Context;
FileID ID = Context.createInMemoryFile(FakeFileName, Code);
tooling::applyAllReplacements(*Replaces, Context.Rewrite);
return Context.getRewrittenText(ID);
}
TEST(IncludeFixer, Typo) {
EXPECT_EQ("#include <string>\nstd::string foo;\n",
runIncludeFixer("std::string foo;\n"));
EXPECT_EQ("// comment\n#include \"foo.h\"\n#include <string>\n"
"std::string foo;\n#include \"dir/bar.h\"\n",
runIncludeFixer("// comment\n#include \"foo.h\"\nstd::string foo;\n"
"#include \"dir/bar.h\"\n"));
EXPECT_EQ("#include \"foo.h\"\n#include <string>\nstd::string foo;\n",
runIncludeFixer("#include \"foo.h\"\nstd::string foo;\n"));
EXPECT_EQ(
"#include \"foo.h\"\n#include <string>\nstd::string::size_type foo;\n",
runIncludeFixer("#include \"foo.h\"\nstd::string::size_type foo;\n"));
EXPECT_EQ("#include <string>\nstd::string foo;\n",
runIncludeFixer("string foo;\n"));
// Should not match std::string.
EXPECT_EQ("::string foo;\n", runIncludeFixer("::string foo;\n"));
}
TEST(IncludeFixer, IncompleteType) {
EXPECT_EQ(
"#include \"foo.h\"\n#include <string>\n"
"namespace std {\nclass string;\n}\nstd::string foo;\n",
runIncludeFixer("#include \"foo.h\"\n"
"namespace std {\nclass string;\n}\nstring foo;\n"));
EXPECT_EQ("#include <string>\n"
"class string;\ntypedef string foo;\nfoo f;\n",
runIncludeFixer("class string;\ntypedef string foo;\nfoo f;\n"));
}
TEST(IncludeFixer, MinimizeInclude) {
std::vector<std::string> IncludePath = {"-Idir/"};
EXPECT_EQ("#include \"otherdir/qux.h\"\na::b::foo bar;\n",
runIncludeFixer("a::b::foo bar;\n", IncludePath));
IncludePath = {"-isystemdir"};
EXPECT_EQ("#include <otherdir/qux.h>\na::b::foo bar;\n",
runIncludeFixer("a::b::foo bar;\n", IncludePath));
IncludePath = {"-iquotedir"};
EXPECT_EQ("#include \"otherdir/qux.h\"\na::b::foo bar;\n",
runIncludeFixer("a::b::foo bar;\n", IncludePath));
IncludePath = {"-Idir", "-Idir/otherdir"};
EXPECT_EQ("#include \"qux.h\"\na::b::foo bar;\n",
runIncludeFixer("a::b::foo bar;\n", IncludePath));
}
TEST(IncludeFixer, NestedName) {
EXPECT_EQ("#include \"dir/otherdir/qux.h\"\n"
"int x = a::b::foo(0);\n",
runIncludeFixer("int x = a::b::foo(0);\n"));
// FIXME: Handle simple macros.
EXPECT_EQ("#define FOO a::b::foo\nint x = FOO;\n",
runIncludeFixer("#define FOO a::b::foo\nint x = FOO;\n"));
EXPECT_EQ("#define FOO(x) a::##x\nint x = FOO(b::foo);\n",
runIncludeFixer("#define FOO(x) a::##x\nint x = FOO(b::foo);\n"));
// The empty namespace is cleaned up by clang-format after clang-include-fixer
// finishes.
EXPECT_EQ("#include \"dir/otherdir/qux.h\"\n"
"\nint a = a::b::foo(0);\n",
runIncludeFixer("namespace a {}\nint a = a::b::foo(0);\n"));
}
TEST(IncludeFixer, MultipleMissingSymbols) {
EXPECT_EQ("#include <string>\nstd::string bar;\nstd::sting foo;\n",
runIncludeFixer("std::string bar;\nstd::sting foo;\n"));
}
TEST(IncludeFixer, ScopedNamespaceSymbols) {
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nb::bar b;\n}",
runIncludeFixer("namespace a {\nb::bar b;\n}"));
EXPECT_EQ("#include \"bar.h\"\nnamespace A {\na::b::bar b;\n}",
runIncludeFixer("namespace A {\na::b::bar b;\n}"));
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nvoid func() { b::bar b; }\n} "
"// namespace a",
runIncludeFixer("namespace a {\nvoid func() { b::bar b; }\n}"));
EXPECT_EQ("namespace A { c::b::bar b; }\n",
runIncludeFixer("namespace A { c::b::bar b; }\n"));
// FIXME: The header should not be added here. Remove this after we support
// full match.
EXPECT_EQ("#include \"bar.h\"\nnamespace A {\na::b::bar b;\n}",
runIncludeFixer("namespace A {\nb::bar b;\n}"));
// Finds candidates for "str::StrCat".
EXPECT_EQ("#include \"strcat.h\"\nnamespace foo2 {\nstr::StrCat b;\n}",
runIncludeFixer("namespace foo2 {\nstr::StrCat b;\n}"));
// str::StrCat2 doesn't exist.
// In these two cases, StrCat2 is a nested class of class str.
EXPECT_EQ("#include \"str.h\"\nnamespace foo2 {\nstr::StrCat2 b;\n}",
runIncludeFixer("namespace foo2 {\nstr::StrCat2 b;\n}"));
EXPECT_EQ("#include \"str.h\"\nnamespace ns {\nstr::StrCat2 b;\n}",
runIncludeFixer("namespace ns {\nstr::StrCat2 b;\n}"));
}
TEST(IncludeFixer, EnumConstantSymbols) {
EXPECT_EQ("#include \"color.h\"\nint test = a::b::Green;\n",
runIncludeFixer("int test = a::b::Green;\n"));
}
TEST(IncludeFixer, IgnoreSymbolFromHeader) {
std::string Code = "#include \"header.h\"";
EXPECT_EQ(Code, runIncludeFixer(Code));
}
// FIXME: add test cases for inserting and sorting multiple headers when
// clang-include-fixer supports multiple headers insertion.
TEST(IncludeFixer, InsertAndSortSingleHeader) {
// Insert one header.
std::string Code = "#include \"a.h\"\n"
"#include \"foo.h\"\n"
"\n"
"namespace a {\nb::bar b;\n}\n";
std::string Expected = "#include \"a.h\"\n"
"#include \"bar.h\"\n"
"#include \"foo.h\"\n"
"\n"
"namespace a {\nb::bar b;\n}\n";
EXPECT_EQ(Expected, runIncludeFixer(Code));
}
TEST(IncludeFixer, DoNotDeleteMatchedSymbol) {
EXPECT_EQ("#include \"Vector.h\"\na::Vector v;",
runIncludeFixer("a::Vector v;"));
}
TEST(IncludeFixer, FixNamespaceQualifiers) {
EXPECT_EQ("#include \"bar.h\"\na::b::bar b;\n",
runIncludeFixer("b::bar b;\n"));
EXPECT_EQ("#include \"bar.h\"\na::b::bar b;\n",
runIncludeFixer("a::b::bar b;\n"));
EXPECT_EQ("#include \"bar.h\"\na::b::bar b;\n",
runIncludeFixer("bar b;\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nb::bar b;\n}\n",
runIncludeFixer("namespace a {\nb::bar b;\n}\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nb::bar b;\n}\n",
runIncludeFixer("namespace a {\nbar b;\n}\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nnamespace b{\nbar b;\n}\n} "
"// namespace a\n",
runIncludeFixer("namespace a {\nnamespace b{\nbar b;\n}\n}\n"));
EXPECT_EQ("c::b::bar b;\n",
runIncludeFixer("c::b::bar b;\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace d {\na::b::bar b;\n}\n",
runIncludeFixer("namespace d {\nbar b;\n}\n"));
EXPECT_EQ("#include \"bar2.h\"\nnamespace c {\na::c::bar b;\n}\n",
runIncludeFixer("namespace c {\nbar b;\n}\n"));
// Test common qualifiers reduction.
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nnamespace d {\nb::bar b;\n}\n} "
"// namespace a\n",
runIncludeFixer("namespace a {\nnamespace d {\nbar b;\n}\n}\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace d {\nnamespace a {\na::b::bar "
"b;\n}\n} // namespace d\n",
runIncludeFixer("namespace d {\nnamespace a {\nbar b;\n}\n}\n"));
// Test nested classes.
EXPECT_EQ("#include \"bar.h\"\nnamespace d {\na::b::bar::t b;\n}\n",
runIncludeFixer("namespace d {\nbar::t b;\n}\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace c {\na::b::bar::t b;\n}\n",
runIncludeFixer("namespace c {\nbar::t b;\n}\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\nb::bar::t b;\n}\n",
runIncludeFixer("namespace a {\nbar::t b;\n}\n"));
EXPECT_EQ("#include \"color.h\"\nint test = a::b::Green;\n",
runIncludeFixer("int test = Green;\n"));
EXPECT_EQ("#include \"color.h\"\nnamespace d {\nint test = a::b::Green;\n}\n",
runIncludeFixer("namespace d {\nint test = Green;\n}\n"));
EXPECT_EQ("#include \"color.h\"\nnamespace a {\nint test = b::Green;\n}\n",
runIncludeFixer("namespace a {\nint test = Green;\n}\n"));
// Test global scope operator.
EXPECT_EQ("#include \"bar.h\"\n::a::b::bar b;\n",
runIncludeFixer("::a::b::bar b;\n"));
EXPECT_EQ("#include \"bar.h\"\nnamespace a {\n::a::b::bar b;\n}\n",
runIncludeFixer("namespace a {\n::a::b::bar b;\n}\n"));
}
TEST(IncludeFixer, FixNamespaceQualifiersForAllInstances) {
const char TestCode[] = R"(
namespace a {
bar b;
int func1() {
bar a;
bar *p = new bar();
return 0;
}
} // namespace a
namespace a {
bar func2() {
bar f;
return f;
}
} // namespace a
// Non-fixed cases:
void f() {
bar b;
}
namespace a {
namespace c {
bar b;
} // namespace c
} // namespace a
)";
const char ExpectedCode[] = R"(
#include "bar.h"
namespace a {
b::bar b;
int func1() {
b::bar a;
b::bar *p = new b::bar();
return 0;
}
} // namespace a
namespace a {
b::bar func2() {
b::bar f;
return f;
}
} // namespace a
// Non-fixed cases:
void f() {
bar b;
}
namespace a {
namespace c {
bar b;
} // namespace c
} // namespace a
)";
EXPECT_EQ(ExpectedCode, runIncludeFixer(TestCode));
}
TEST(IncludeFixer, DontAddQualifiersForMissingCompleteType) {
EXPECT_EQ("#include \"bar.h\"\nclass bar;\nvoid f() {\nbar* b;\nb->f();\n}",
runIncludeFixer("class bar;\nvoid f() {\nbar* b;\nb->f();\n}"));
}
} // namespace
} // namespace include_fixer
} // namespace clang
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