MutationsTest.cpp
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//===- MutationsTest.cpp --------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file tests mutation API for syntax trees.
//
//===----------------------------------------------------------------------===//
#include "clang/Tooling/Syntax/Mutations.h"
#include "TreeTestBase.h"
#include "clang/Tooling/Syntax/BuildTree.h"
using namespace clang;
using namespace clang::syntax;
namespace {
class MutationTest : public SyntaxTreeTest {
protected:
using Transformation = std::function<void(const llvm::Annotations & /*Input*/,
TranslationUnit * /*Root*/)>;
void CheckTransformation(Transformation Transform, std::string Input,
std::string Expected) {
llvm::Annotations Source(Input);
auto *Root = buildTree(Source.code(), GetParam());
Transform(Source, Root);
auto Replacements = syntax::computeReplacements(*Arena, *Root);
auto Output = tooling::applyAllReplacements(Source.code(), Replacements);
if (!Output) {
ADD_FAILURE() << "could not apply replacements: "
<< llvm::toString(Output.takeError());
return;
}
EXPECT_EQ(Expected, *Output) << "input is:\n" << Input;
};
// Removes the selected statement. Input should have exactly one selected
// range and it should correspond to a single statement.
Transformation RemoveStatement = [this](const llvm::Annotations &Input,
TranslationUnit *Root) {
auto *S = cast<syntax::Statement>(nodeByRange(Input.range(), Root));
ASSERT_TRUE(S->canModify()) << "cannot remove a statement";
syntax::removeStatement(*Arena, S);
EXPECT_TRUE(S->isDetached());
EXPECT_FALSE(S->isOriginal())
<< "node removed from tree cannot be marked as original";
};
};
INSTANTIATE_TEST_CASE_P(SyntaxTreeTests, MutationTest,
::testing::ValuesIn(allTestClangConfigs()), );
TEST_P(MutationTest, RemoveStatement_InCompound) {
CheckTransformation(RemoveStatement, "void test() { [[100+100;]] test(); }",
"void test() { test(); }");
}
TEST_P(MutationTest, RemoveStatement_InCompound_Empty) {
CheckTransformation(RemoveStatement, "void test() { [[;]] }",
"void test() { }");
}
TEST_P(MutationTest, RemoveStatement_LeaveEmpty) {
CheckTransformation(RemoveStatement, "void test() { if (1) [[{}]] else {} }",
"void test() { if (1) ; else {} }");
}
} // namespace