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//===- unittest/Tooling/RefactoringCallbacksTest.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
//
//===----------------------------------------------------------------------===//
#include "RewriterTestContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/RefactoringCallbacks.h"
#include "gtest/gtest.h"
namespace clang {
namespace tooling {
using namespace ast_matchers;
template <typename T>
void expectRewritten(const std::string &Code, const std::string &Expected,
const T &AMatcher, RefactoringCallback &Callback) {
std::map<std::string, Replacements> FileToReplace;
ASTMatchRefactorer Finder(FileToReplace);
Finder.addMatcher(traverse(TK_AsIs, AMatcher), &Callback);
std::unique_ptr<tooling::FrontendActionFactory> Factory(
tooling::newFrontendActionFactory(&Finder));
ASSERT_TRUE(tooling::runToolOnCode(Factory->create(), Code))
<< "Parsing error in \"" << Code << "\"";
RewriterTestContext Context;
FileID ID = Context.createInMemoryFile("input.cc", Code);
EXPECT_TRUE(tooling::applyAllReplacements(FileToReplace["input.cc"],
Context.Rewrite));
EXPECT_EQ(Expected, Context.getRewrittenText(ID));
}
TEST(RefactoringCallbacksTest, ReplacesStmtsWithString) {
std::string Code = "void f() { int i = 1; }";
std::string Expected = "void f() { ; }";
ReplaceStmtWithText Callback("id", ";");
expectRewritten(Code, Expected, declStmt().bind("id"), Callback);
}
TEST(RefactoringCallbacksTest, ReplacesStmtsInCalledMacros) {
std::string Code = "#define A void f() { int i = 1; }\nA";
std::string Expected = "#define A void f() { ; }\nA";
ReplaceStmtWithText Callback("id", ";");
expectRewritten(Code, Expected, declStmt().bind("id"), Callback);
}
TEST(RefactoringCallbacksTest, IgnoresStmtsInUncalledMacros) {
std::string Code = "#define A void f() { int i = 1; }";
std::string Expected = "#define A void f() { int i = 1; }";
ReplaceStmtWithText Callback("id", ";");
expectRewritten(Code, Expected, declStmt().bind("id"), Callback);
}
TEST(RefactoringCallbacksTest, ReplacesInteger) {
std::string Code = "void f() { int i = 1; }";
std::string Expected = "void f() { int i = 2; }";
ReplaceStmtWithText Callback("id", "2");
expectRewritten(Code, Expected, expr(integerLiteral()).bind("id"), Callback);
}
TEST(RefactoringCallbacksTest, ReplacesStmtWithStmt) {
std::string Code = "void f() { int i = false ? 1 : i * 2; }";
std::string Expected = "void f() { int i = i * 2; }";
ReplaceStmtWithStmt Callback("always-false", "should-be");
expectRewritten(
Code, Expected,
conditionalOperator(hasCondition(cxxBoolLiteral(equals(false))),
hasFalseExpression(expr().bind("should-be")))
.bind("always-false"),
Callback);
}
TEST(RefactoringCallbacksTest, ReplacesIfStmt) {
std::string Code = "bool a; void f() { if (a) f(); else a = true; }";
std::string Expected = "bool a; void f() { f(); }";
ReplaceIfStmtWithItsBody Callback("id", true);
expectRewritten(Code, Expected,
ifStmt(hasCondition(implicitCastExpr(hasSourceExpression(
declRefExpr(to(varDecl(hasName("a"))))))))
.bind("id"),
Callback);
}
TEST(RefactoringCallbacksTest, RemovesEntireIfOnEmptyElse) {
std::string Code = "void f() { if (false) int i = 0; }";
std::string Expected = "void f() { }";
ReplaceIfStmtWithItsBody Callback("id", false);
expectRewritten(
Code, Expected,
ifStmt(hasCondition(cxxBoolLiteral(equals(false)))).bind("id"), Callback);
}
TEST(RefactoringCallbacksTest, TemplateJustText) {
std::string Code = "void f() { int i = 1; }";
std::string Expected = "void f() { FOO }";
auto Callback = ReplaceNodeWithTemplate::create("id", "FOO");
EXPECT_FALSE(Callback.takeError());
expectRewritten(Code, Expected, declStmt().bind("id"), **Callback);
}
TEST(RefactoringCallbacksTest, TemplateSimpleSubst) {
std::string Code = "void f() { int i = 1; }";
std::string Expected = "void f() { long x = 1; }";
auto Callback = ReplaceNodeWithTemplate::create("decl", "long x = ${init}");
EXPECT_FALSE(Callback.takeError());
expectRewritten(Code, Expected,
varDecl(hasInitializer(expr().bind("init"))).bind("decl"),
**Callback);
}
TEST(RefactoringCallbacksTest, TemplateLiteral) {
std::string Code = "void f() { int i = 1; }";
std::string Expected = "void f() { string x = \"$-1\"; }";
auto Callback = ReplaceNodeWithTemplate::create("decl",
"string x = \"$$-${init}\"");
EXPECT_FALSE(Callback.takeError());
expectRewritten(Code, Expected,
varDecl(hasInitializer(expr().bind("init"))).bind("decl"),
**Callback);
}
static void ExpectStringError(const std::string &Expected,
llvm::Error E) {
std::string Found;
handleAllErrors(std::move(E), [&](const llvm::StringError &SE) {
llvm::raw_string_ostream Stream(Found);
SE.log(Stream);
});
EXPECT_EQ(Expected, Found);
}
TEST(RefactoringCallbacksTest, TemplateUnterminated) {
auto Callback = ReplaceNodeWithTemplate::create("decl",
"string x = \"$$-${init\"");
ExpectStringError("Unterminated ${...} in replacement template near ${init\"",
Callback.takeError());
}
TEST(RefactoringCallbacksTest, TemplateUnknownDollar) {
auto Callback = ReplaceNodeWithTemplate::create("decl",
"string x = \"$<");
ExpectStringError("Invalid $ in replacement template near $<",
Callback.takeError());
}
} // namespace tooling
} // end namespace clang
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