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//===- unittest/Tooling/RefactoringTestActionRulesTest.cpp ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ReplacementTest.h"
#include "RewriterTestContext.h"
#include "clang/Tooling/Refactoring.h"
#include "clang/Tooling/Refactoring/RefactoringActionRules.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Support/Errc.h"
#include "gtest/gtest.h"
using namespace clang;
using namespace tooling;
using namespace refactoring_action_rules;
namespace {
class RefactoringActionRulesTest : public ::testing::Test {
protected:
void SetUp() override {
Context.Sources.setMainFileID(
Context.createInMemoryFile("input.cpp", DefaultCode));
}
RewriterTestContext Context;
std::string DefaultCode = std::string(100, 'a');
};
Expected<Optional<AtomicChanges>>
createReplacements(const std::unique_ptr<RefactoringActionRule> &Rule,
RefactoringRuleContext &Context) {
return cast<SourceChangeRefactoringRule>(*Rule).createSourceReplacements(
Context);
}
TEST_F(RefactoringActionRulesTest, MyFirstRefactoringRule) {
auto ReplaceAWithB =
[](std::pair<selection::SourceSelectionRange, int> Selection)
-> Expected<AtomicChanges> {
const SourceManager &SM = Selection.first.getSources();
SourceLocation Loc = Selection.first.getRange().getBegin().getLocWithOffset(
Selection.second);
AtomicChange Change(SM, Loc);
llvm::Error E = Change.replace(SM, Loc, 1, "b");
if (E)
return std::move(E);
return AtomicChanges{Change};
};
class SelectionRequirement : public selection::Requirement {
public:
std::pair<selection::SourceSelectionRange, int>
evaluateSelection(selection::SourceSelectionRange Selection) const {
return std::make_pair(Selection, 20);
}
};
auto Rule = createRefactoringRule(ReplaceAWithB,
requiredSelection(SelectionRequirement()));
// When the requirements are satisifed, the rule's function must be invoked.
{
RefactoringRuleContext RefContext(Context.Sources);
SourceLocation Cursor =
Context.Sources.getLocForStartOfFile(Context.Sources.getMainFileID())
.getLocWithOffset(10);
RefContext.setSelectionRange({Cursor, Cursor});
Expected<Optional<AtomicChanges>> ErrorOrResult =
createReplacements(Rule, RefContext);
ASSERT_FALSE(!ErrorOrResult);
ASSERT_FALSE(!*ErrorOrResult);
AtomicChanges Result = std::move(**ErrorOrResult);
ASSERT_EQ(Result.size(), 1u);
std::string YAMLString =
const_cast<AtomicChange &>(Result[0]).toYAMLString();
ASSERT_STREQ("---\n"
"Key: 'input.cpp:30'\n"
"FilePath: input.cpp\n"
"Error: ''\n"
"InsertedHeaders: \n"
"RemovedHeaders: \n"
"Replacements: \n" // Extra whitespace here!
" - FilePath: input.cpp\n"
" Offset: 30\n"
" Length: 1\n"
" ReplacementText: b\n"
"...\n",
YAMLString.c_str());
}
// When one of the requirements is not satisfied, perform should return either
// None or a valid diagnostic.
{
RefactoringRuleContext RefContext(Context.Sources);
Expected<Optional<AtomicChanges>> ErrorOrResult =
createReplacements(Rule, RefContext);
ASSERT_FALSE(!ErrorOrResult);
Optional<AtomicChanges> Value = std::move(*ErrorOrResult);
EXPECT_TRUE(!Value);
}
}
TEST_F(RefactoringActionRulesTest, ReturnError) {
Expected<AtomicChanges> (*Func)(selection::SourceSelectionRange) =
[](selection::SourceSelectionRange) -> Expected<AtomicChanges> {
return llvm::make_error<llvm::StringError>(
"Error", std::make_error_code(std::errc::bad_message));
};
auto Rule = createRefactoringRule(
Func, requiredSelection(
selection::identity<selection::SourceSelectionRange>()));
RefactoringRuleContext RefContext(Context.Sources);
SourceLocation Cursor =
Context.Sources.getLocForStartOfFile(Context.Sources.getMainFileID());
RefContext.setSelectionRange({Cursor, Cursor});
Expected<Optional<AtomicChanges>> Result =
createReplacements(Rule, RefContext);
ASSERT_TRUE(!Result);
std::string Message;
llvm::handleAllErrors(Result.takeError(), [&](llvm::StringError &Error) {
Message = Error.getMessage();
});
EXPECT_EQ(Message, "Error");
}
TEST_F(RefactoringActionRulesTest, ReturnInitiationDiagnostic) {
RefactoringRuleContext RefContext(Context.Sources);
class SelectionRequirement : public selection::Requirement {
public:
Expected<Optional<int>>
evaluateSelection(selection::SourceSelectionRange Selection) const {
return llvm::make_error<llvm::StringError>(
"bad selection", std::make_error_code(std::errc::bad_message));
}
};
auto Rule = createRefactoringRule(
[](int) -> Expected<AtomicChanges> {
llvm::report_fatal_error("Should not run!");
},
requiredSelection(SelectionRequirement()));
SourceLocation Cursor =
Context.Sources.getLocForStartOfFile(Context.Sources.getMainFileID());
RefContext.setSelectionRange({Cursor, Cursor});
Expected<Optional<AtomicChanges>> Result =
createReplacements(Rule, RefContext);
ASSERT_TRUE(!Result);
std::string Message;
llvm::handleAllErrors(Result.takeError(), [&](llvm::StringError &Error) {
Message = Error.getMessage();
});
EXPECT_EQ(Message, "bad selection");
}
} // end anonymous namespace
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