UsingDeclarationsSorterTest.cpp
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//===- UsingDeclarationsSorterTest.cpp - Formatting 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 "clang/Format/Format.h"
#include "llvm/Support/Debug.h"
#include "gtest/gtest.h"
#define DEBUG_TYPE "using-declarations-sorter-test"
namespace clang {
namespace format {
namespace {
class UsingDeclarationsSorterTest : public ::testing::Test {
protected:
std::string sortUsingDeclarations(llvm::StringRef Code,
const std::vector<tooling::Range> &Ranges,
const FormatStyle &Style = getLLVMStyle()) {
LLVM_DEBUG(llvm::errs() << "---\n");
LLVM_DEBUG(llvm::errs() << Code << "\n\n");
tooling::Replacements Replaces =
clang::format::sortUsingDeclarations(Style, Code, Ranges, "<stdin>");
auto Result = applyAllReplacements(Code, Replaces);
EXPECT_TRUE(static_cast<bool>(Result));
LLVM_DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
return *Result;
}
std::string sortUsingDeclarations(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
return sortUsingDeclarations(Code,
/*Ranges=*/{1, tooling::Range(0, Code.size())},
Style);
}
};
TEST_F(UsingDeclarationsSorterTest, SwapsTwoConsecutiveUsingDeclarations) {
EXPECT_EQ("using a;\n"
"using b;",
sortUsingDeclarations("using a;\n"
"using b;"));
EXPECT_EQ("using a;\n"
"using aa;",
sortUsingDeclarations("using aa;\n"
"using a;"));
EXPECT_EQ("using a;\n"
"using ::a;",
sortUsingDeclarations("using a;\n"
"using ::a;"));
EXPECT_EQ("using a::bcd;\n"
"using a::cd;",
sortUsingDeclarations("using a::cd;\n"
"using a::bcd;"));
EXPECT_EQ("using a;\n"
"using a::a;",
sortUsingDeclarations("using a::a;\n"
"using a;"));
EXPECT_EQ("using a::ba::aa;\n"
"using a::bb::ccc;",
sortUsingDeclarations("using a::bb::ccc;\n"
"using a::ba::aa;"));
EXPECT_EQ("using a;\n"
"using typename a;",
sortUsingDeclarations("using typename a;\n"
"using a;"));
EXPECT_EQ("using typename z;\n"
"using typenamea;",
sortUsingDeclarations("using typenamea;\n"
"using typename z;"));
EXPECT_EQ("using a, b;\n"
"using aa;",
sortUsingDeclarations("using aa;\n"
"using a, b;"));
}
TEST_F(UsingDeclarationsSorterTest, UsingDeclarationOrder) {
EXPECT_EQ("using A;\n"
"using a;",
sortUsingDeclarations("using A;\n"
"using a;"));
EXPECT_EQ("using a;\n"
"using A;",
sortUsingDeclarations("using a;\n"
"using A;"));
EXPECT_EQ("using a;\n"
"using B;",
sortUsingDeclarations("using B;\n"
"using a;"));
// Ignores leading '::'.
EXPECT_EQ("using ::a;\n"
"using A;",
sortUsingDeclarations("using ::a;\n"
"using A;"));
EXPECT_EQ("using ::A;\n"
"using a;",
sortUsingDeclarations("using ::A;\n"
"using a;"));
// Sorts '_' before 'a' and 'A'.
EXPECT_EQ("using _;\n"
"using A;",
sortUsingDeclarations("using A;\n"
"using _;"));
EXPECT_EQ("using _;\n"
"using a;",
sortUsingDeclarations("using a;\n"
"using _;"));
EXPECT_EQ("using a::_;\n"
"using a::a;",
sortUsingDeclarations("using a::a;\n"
"using a::_;"));
// Sorts non-namespace names before namespace names at the same level.
EXPECT_EQ("using ::testing::_;\n"
"using ::testing::Aardvark;\n"
"using ::testing::kMax;\n"
"using ::testing::Xylophone;\n"
"using ::testing::apple::Honeycrisp;\n"
"using ::testing::zebra::Stripes;",
sortUsingDeclarations("using ::testing::Aardvark;\n"
"using ::testing::Xylophone;\n"
"using ::testing::kMax;\n"
"using ::testing::_;\n"
"using ::testing::apple::Honeycrisp;\n"
"using ::testing::zebra::Stripes;"));
}
TEST_F(UsingDeclarationsSorterTest, SortsStably) {
EXPECT_EQ("using a;\n"
"using A;\n"
"using a;\n"
"using A;\n"
"using a;\n"
"using A;\n"
"using a;\n"
"using B;\n"
"using b;\n"
"using B;\n"
"using b;\n"
"using B;\n"
"using b;",
sortUsingDeclarations("using a;\n"
"using B;\n"
"using a;\n"
"using b;\n"
"using A;\n"
"using a;\n"
"using b;\n"
"using B;\n"
"using b;\n"
"using A;\n"
"using a;\n"
"using b;\n"
"using b;\n"
"using B;\n"
"using b;\n"
"using A;\n"
"using a;"));
}
TEST_F(UsingDeclarationsSorterTest, SortsMultipleTopLevelDeclarations) {
EXPECT_EQ("using a;\n"
"using b;\n"
"using c;\n"
"using d;\n"
"using e;",
sortUsingDeclarations("using d;\n"
"using b;\n"
"using e;\n"
"using a;\n"
"using c;"));
EXPECT_EQ("#include <iostream>\n"
"using std::cin;\n"
"using std::cout;\n"
"using ::std::endl;\n"
"int main();",
sortUsingDeclarations("#include <iostream>\n"
"using std::cout;\n"
"using ::std::endl;\n"
"using std::cin;\n"
"int main();"));
}
TEST_F(UsingDeclarationsSorterTest, BreaksOnEmptyLines) {
EXPECT_EQ("using b;\n"
"using c;\n"
"\n"
"using a;\n"
"using d;",
sortUsingDeclarations("using c;\n"
"using b;\n"
"\n"
"using d;\n"
"using a;"));
}
TEST_F(UsingDeclarationsSorterTest, BreaksOnUsingNamespace) {
EXPECT_EQ("using b;\n"
"using namespace std;\n"
"using a;",
sortUsingDeclarations("using b;\n"
"using namespace std;\n"
"using a;"));
}
TEST_F(UsingDeclarationsSorterTest, KeepsUsingDeclarationsInPPDirectives) {
EXPECT_EQ("#define A \\\n"
"using b;\\\n"
"using a;",
sortUsingDeclarations("#define A \\\n"
"using b;\\\n"
"using a;"));
}
TEST_F(UsingDeclarationsSorterTest, KeepsTypeAliases) {
auto Code = "struct C { struct B { struct A; }; };\n"
"using B = C::B;\n"
"using A = B::A;";
EXPECT_EQ(Code, sortUsingDeclarations(Code));
}
TEST_F(UsingDeclarationsSorterTest, MovesTrailingCommentsWithDeclarations) {
EXPECT_EQ("using a; // line a1\n"
"using b; /* line b1\n"
" * line b2\n"
" * line b3 */\n"
"using c; // line c1\n"
" // line c2",
sortUsingDeclarations("using c; // line c1\n"
" // line c2\n"
"using b; /* line b1\n"
" * line b2\n"
" * line b3 */\n"
"using a; // line a1"));
}
TEST_F(UsingDeclarationsSorterTest, SortsInStructScope) {
EXPECT_EQ("struct pt3 : pt2 {\n"
" using pt2::x;\n"
" using pt2::y;\n"
" float z;\n"
"};",
sortUsingDeclarations("struct pt3 : pt2 {\n"
" using pt2::y;\n"
" using pt2::x;\n"
" float z;\n"
"};"));
}
TEST_F(UsingDeclarationsSorterTest, KeepsOperators) {
EXPECT_EQ("using a::operator();\n"
"using a::operator-;\n"
"using a::operator+;",
sortUsingDeclarations("using a::operator();\n"
"using a::operator-;\n"
"using a::operator+;"));
}
TEST_F(UsingDeclarationsSorterTest, SortsUsingDeclarationsInsideNamespaces) {
EXPECT_EQ("namespace A {\n"
"struct B;\n"
"struct C;\n"
"}\n"
"namespace X {\n"
"using A::B;\n"
"using A::C;\n"
"}",
sortUsingDeclarations("namespace A {\n"
"struct B;\n"
"struct C;\n"
"}\n"
"namespace X {\n"
"using A::C;\n"
"using A::B;\n"
"}"));
}
TEST_F(UsingDeclarationsSorterTest, SupportsClangFormatOff) {
EXPECT_EQ("// clang-format off\n"
"using b;\n"
"using a;\n"
"// clang-format on\n"
"using c;\n"
"using d;",
sortUsingDeclarations("// clang-format off\n"
"using b;\n"
"using a;\n"
"// clang-format on\n"
"using d;\n"
"using c;"));
}
TEST_F(UsingDeclarationsSorterTest, SortsPartialRangeOfUsingDeclarations) {
// Sorts the whole block of using declarations surrounding the range.
EXPECT_EQ("using a;\n"
"using b;\n"
"using c;",
sortUsingDeclarations("using b;\n"
"using c;\n" // starts at offset 10
"using a;",
{tooling::Range(10, 15)}));
EXPECT_EQ("using a;\n"
"using b;\n"
"using c;\n"
"using A = b;",
sortUsingDeclarations("using b;\n"
"using c;\n" // starts at offset 10
"using a;\n"
"using A = b;",
{tooling::Range(10, 15)}));
EXPECT_EQ("using d;\n"
"using c;\n"
"\n"
"using a;\n"
"using b;\n"
"\n"
"using f;\n"
"using e;",
sortUsingDeclarations("using d;\n"
"using c;\n"
"\n"
"using b;\n" // starts at offset 19
"using a;\n"
"\n"
"using f;\n"
"using e;",
{tooling::Range(19, 1)}));
}
TEST_F(UsingDeclarationsSorterTest,
SortsUsingDeclarationsWithLeadingkComments) {
EXPECT_EQ("/* comment */ using a;\n"
"/* comment */ using b;",
sortUsingDeclarations("/* comment */ using b;\n"
"/* comment */ using a;"));
}
TEST_F(UsingDeclarationsSorterTest, DeduplicatesUsingDeclarations) {
EXPECT_EQ("using a;\n"
"using b;\n"
"using c;\n"
"\n"
"using a;\n"
"using e;",
sortUsingDeclarations("using c;\n"
"using a;\n"
"using b;\n"
"using a;\n"
"using b;\n"
"\n"
"using e;\n"
"using a;\n"
"using e;"));
}
} // end namespace
} // end namespace format
} // end namespace clang