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4bda00e90e
Some const methods of Expected<T> invoke assertIsChecked(), so we should mark it as const too. Differential Revision: https://reviews.llvm.org/D105292
1035 lines
34 KiB
C++
1035 lines
34 KiB
C++
//===----- unittests/ErrorTest.cpp - Error.h tests ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Error.h"
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#include "llvm-c/Error.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Testing/Support/Error.h"
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#include "gtest/gtest-spi.h"
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#include "gtest/gtest.h"
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#include <memory>
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using namespace llvm;
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namespace {
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// Custom error class with a default base class and some random 'info' attached.
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class CustomError : public ErrorInfo<CustomError> {
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public:
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// Create an error with some info attached.
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CustomError(int Info) : Info(Info) {}
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// Get the info attached to this error.
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int getInfo() const { return Info; }
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// Log this error to a stream.
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void log(raw_ostream &OS) const override {
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OS << "CustomError {" << getInfo() << "}";
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}
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std::error_code convertToErrorCode() const override {
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llvm_unreachable("CustomError doesn't support ECError conversion");
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}
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// Used by ErrorInfo::classID.
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static char ID;
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protected:
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// This error is subclassed below, but we can't use inheriting constructors
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// yet, so we can't propagate the constructors through ErrorInfo. Instead
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// we have to have a default constructor and have the subclass initialize all
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// fields.
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CustomError() : Info(0) {}
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int Info;
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};
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char CustomError::ID = 0;
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// Custom error class with a custom base class and some additional random
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// 'info'.
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class CustomSubError : public ErrorInfo<CustomSubError, CustomError> {
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public:
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// Create a sub-error with some info attached.
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CustomSubError(int Info, int ExtraInfo) : ExtraInfo(ExtraInfo) {
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this->Info = Info;
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}
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// Get the extra info attached to this error.
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int getExtraInfo() const { return ExtraInfo; }
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// Log this error to a stream.
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void log(raw_ostream &OS) const override {
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OS << "CustomSubError { " << getInfo() << ", " << getExtraInfo() << "}";
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}
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std::error_code convertToErrorCode() const override {
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llvm_unreachable("CustomSubError doesn't support ECError conversion");
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}
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// Used by ErrorInfo::classID.
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static char ID;
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protected:
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int ExtraInfo;
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};
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char CustomSubError::ID = 0;
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static Error handleCustomError(const CustomError &CE) {
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return Error::success();
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}
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static void handleCustomErrorVoid(const CustomError &CE) {}
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static Error handleCustomErrorUP(std::unique_ptr<CustomError> CE) {
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return Error::success();
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}
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static void handleCustomErrorUPVoid(std::unique_ptr<CustomError> CE) {}
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// Test that success values implicitly convert to false, and don't cause crashes
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// once they've been implicitly converted.
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TEST(Error, CheckedSuccess) {
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Error E = Error::success();
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EXPECT_FALSE(E) << "Unexpected error while testing Error 'Success'";
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}
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// Test that unchecked success values cause an abort.
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#if LLVM_ENABLE_ABI_BREAKING_CHECKS
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TEST(Error, UncheckedSuccess) {
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EXPECT_DEATH({ Error E = Error::success(); },
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"Program aborted due to an unhandled Error:")
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<< "Unchecked Error Succes value did not cause abort()";
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}
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#endif
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// ErrorAsOutParameter tester.
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void errAsOutParamHelper(Error &Err) {
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ErrorAsOutParameter ErrAsOutParam(&Err);
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// Verify that checked flag is raised - assignment should not crash.
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Err = Error::success();
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// Raise the checked bit manually - caller should still have to test the
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// error.
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(void)!!Err;
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}
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// Test that ErrorAsOutParameter sets the checked flag on construction.
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TEST(Error, ErrorAsOutParameterChecked) {
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Error E = Error::success();
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errAsOutParamHelper(E);
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(void)!!E;
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}
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// Test that ErrorAsOutParameter clears the checked flag on destruction.
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#if LLVM_ENABLE_ABI_BREAKING_CHECKS
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TEST(Error, ErrorAsOutParameterUnchecked) {
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EXPECT_DEATH({ Error E = Error::success(); errAsOutParamHelper(E); },
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"Program aborted due to an unhandled Error:")
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<< "ErrorAsOutParameter did not clear the checked flag on destruction.";
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}
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#endif
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// Check that we abort on unhandled failure cases. (Force conversion to bool
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// to make sure that we don't accidentally treat checked errors as handled).
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// Test runs in debug mode only.
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#if LLVM_ENABLE_ABI_BREAKING_CHECKS
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TEST(Error, UncheckedError) {
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auto DropUnhandledError = []() {
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Error E = make_error<CustomError>(42);
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(void)!E;
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};
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EXPECT_DEATH(DropUnhandledError(),
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"Program aborted due to an unhandled Error:")
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<< "Unhandled Error failure value did not cause abort()";
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}
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#endif
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// Check 'Error::isA<T>' method handling.
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TEST(Error, IsAHandling) {
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// Check 'isA' handling.
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Error E = make_error<CustomError>(1);
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Error F = make_error<CustomSubError>(1, 2);
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Error G = Error::success();
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EXPECT_TRUE(E.isA<CustomError>());
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EXPECT_FALSE(E.isA<CustomSubError>());
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EXPECT_TRUE(F.isA<CustomError>());
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EXPECT_TRUE(F.isA<CustomSubError>());
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EXPECT_FALSE(G.isA<CustomError>());
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consumeError(std::move(E));
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consumeError(std::move(F));
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consumeError(std::move(G));
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}
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// Check that we can handle a custom error.
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TEST(Error, HandleCustomError) {
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int CaughtErrorInfo = 0;
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handleAllErrors(make_error<CustomError>(42), [&](const CustomError &CE) {
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CaughtErrorInfo = CE.getInfo();
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});
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EXPECT_TRUE(CaughtErrorInfo == 42) << "Wrong result from CustomError handler";
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}
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// Check that handler type deduction also works for handlers
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// of the following types:
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// void (const Err&)
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// Error (const Err&) mutable
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// void (const Err&) mutable
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// Error (Err&)
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// void (Err&)
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// Error (Err&) mutable
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// void (Err&) mutable
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// Error (unique_ptr<Err>)
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// void (unique_ptr<Err>)
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// Error (unique_ptr<Err>) mutable
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// void (unique_ptr<Err>) mutable
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TEST(Error, HandlerTypeDeduction) {
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handleAllErrors(make_error<CustomError>(42), [](const CustomError &CE) {});
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handleAllErrors(
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make_error<CustomError>(42),
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[](const CustomError &CE) mutable -> Error { return Error::success(); });
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handleAllErrors(make_error<CustomError>(42),
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[](const CustomError &CE) mutable {});
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handleAllErrors(make_error<CustomError>(42),
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[](CustomError &CE) -> Error { return Error::success(); });
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handleAllErrors(make_error<CustomError>(42), [](CustomError &CE) {});
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handleAllErrors(make_error<CustomError>(42),
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[](CustomError &CE) mutable -> Error { return Error::success(); });
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handleAllErrors(make_error<CustomError>(42), [](CustomError &CE) mutable {});
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handleAllErrors(
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make_error<CustomError>(42),
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[](std::unique_ptr<CustomError> CE) -> Error { return Error::success(); });
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handleAllErrors(make_error<CustomError>(42),
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[](std::unique_ptr<CustomError> CE) {});
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handleAllErrors(
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make_error<CustomError>(42),
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[](std::unique_ptr<CustomError> CE) mutable -> Error { return Error::success(); });
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handleAllErrors(make_error<CustomError>(42),
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[](std::unique_ptr<CustomError> CE) mutable {});
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// Check that named handlers of type 'Error (const Err&)' work.
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handleAllErrors(make_error<CustomError>(42), handleCustomError);
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// Check that named handlers of type 'void (const Err&)' work.
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handleAllErrors(make_error<CustomError>(42), handleCustomErrorVoid);
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// Check that named handlers of type 'Error (std::unique_ptr<Err>)' work.
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handleAllErrors(make_error<CustomError>(42), handleCustomErrorUP);
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// Check that named handlers of type 'Error (std::unique_ptr<Err>)' work.
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handleAllErrors(make_error<CustomError>(42), handleCustomErrorUPVoid);
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}
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// Test that we can handle errors with custom base classes.
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TEST(Error, HandleCustomErrorWithCustomBaseClass) {
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int CaughtErrorInfo = 0;
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int CaughtErrorExtraInfo = 0;
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handleAllErrors(make_error<CustomSubError>(42, 7),
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[&](const CustomSubError &SE) {
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CaughtErrorInfo = SE.getInfo();
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CaughtErrorExtraInfo = SE.getExtraInfo();
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});
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EXPECT_TRUE(CaughtErrorInfo == 42 && CaughtErrorExtraInfo == 7)
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<< "Wrong result from CustomSubError handler";
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}
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// Check that we trigger only the first handler that applies.
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TEST(Error, FirstHandlerOnly) {
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int DummyInfo = 0;
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int CaughtErrorInfo = 0;
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int CaughtErrorExtraInfo = 0;
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handleAllErrors(make_error<CustomSubError>(42, 7),
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[&](const CustomSubError &SE) {
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CaughtErrorInfo = SE.getInfo();
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CaughtErrorExtraInfo = SE.getExtraInfo();
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},
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[&](const CustomError &CE) { DummyInfo = CE.getInfo(); });
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EXPECT_TRUE(CaughtErrorInfo == 42 && CaughtErrorExtraInfo == 7 &&
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DummyInfo == 0)
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<< "Activated the wrong Error handler(s)";
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}
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// Check that general handlers shadow specific ones.
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TEST(Error, HandlerShadowing) {
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int CaughtErrorInfo = 0;
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int DummyInfo = 0;
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int DummyExtraInfo = 0;
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handleAllErrors(
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make_error<CustomSubError>(42, 7),
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[&](const CustomError &CE) { CaughtErrorInfo = CE.getInfo(); },
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[&](const CustomSubError &SE) {
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DummyInfo = SE.getInfo();
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DummyExtraInfo = SE.getExtraInfo();
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});
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EXPECT_TRUE(CaughtErrorInfo == 42 && DummyInfo == 0 && DummyExtraInfo == 0)
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<< "General Error handler did not shadow specific handler";
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}
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// Test joinErrors.
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TEST(Error, CheckJoinErrors) {
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int CustomErrorInfo1 = 0;
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int CustomErrorInfo2 = 0;
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int CustomErrorExtraInfo = 0;
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Error E =
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joinErrors(make_error<CustomError>(7), make_error<CustomSubError>(42, 7));
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handleAllErrors(std::move(E),
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[&](const CustomSubError &SE) {
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CustomErrorInfo2 = SE.getInfo();
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CustomErrorExtraInfo = SE.getExtraInfo();
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},
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[&](const CustomError &CE) {
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// Assert that the CustomError instance above is handled
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// before the
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// CustomSubError - joinErrors should preserve error
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// ordering.
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EXPECT_EQ(CustomErrorInfo2, 0)
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<< "CustomErrorInfo2 should be 0 here. "
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"joinErrors failed to preserve ordering.\n";
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CustomErrorInfo1 = CE.getInfo();
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});
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EXPECT_TRUE(CustomErrorInfo1 == 7 && CustomErrorInfo2 == 42 &&
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CustomErrorExtraInfo == 7)
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<< "Failed handling compound Error.";
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// Test appending a single item to a list.
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{
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int Sum = 0;
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handleAllErrors(
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joinErrors(
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joinErrors(make_error<CustomError>(7),
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make_error<CustomError>(7)),
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make_error<CustomError>(7)),
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[&](const CustomError &CE) {
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Sum += CE.getInfo();
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});
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EXPECT_EQ(Sum, 21) << "Failed to correctly append error to error list.";
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}
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// Test prepending a single item to a list.
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{
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int Sum = 0;
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handleAllErrors(
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joinErrors(
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make_error<CustomError>(7),
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joinErrors(make_error<CustomError>(7),
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make_error<CustomError>(7))),
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[&](const CustomError &CE) {
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Sum += CE.getInfo();
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});
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EXPECT_EQ(Sum, 21) << "Failed to correctly prepend error to error list.";
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}
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// Test concatenating two error lists.
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{
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int Sum = 0;
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handleAllErrors(
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joinErrors(
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joinErrors(
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make_error<CustomError>(7),
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make_error<CustomError>(7)),
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joinErrors(
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make_error<CustomError>(7),
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make_error<CustomError>(7))),
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[&](const CustomError &CE) {
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Sum += CE.getInfo();
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});
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EXPECT_EQ(Sum, 28) << "Failed to correctly concatenate error lists.";
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}
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}
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// Test that we can consume success values.
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TEST(Error, ConsumeSuccess) {
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Error E = Error::success();
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consumeError(std::move(E));
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}
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TEST(Error, ConsumeError) {
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Error E = make_error<CustomError>(7);
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consumeError(std::move(E));
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}
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// Test that handleAllUnhandledErrors crashes if an error is not caught.
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// Test runs in debug mode only.
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#if LLVM_ENABLE_ABI_BREAKING_CHECKS
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TEST(Error, FailureToHandle) {
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auto FailToHandle = []() {
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handleAllErrors(make_error<CustomError>(7), [&](const CustomSubError &SE) {
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errs() << "This should never be called";
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exit(1);
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});
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};
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EXPECT_DEATH(FailToHandle(),
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"Failure value returned from cantFail wrapped call\n"
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"CustomError \\{7\\}")
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<< "Unhandled Error in handleAllErrors call did not cause an "
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"abort()";
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}
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#endif
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// Test that handleAllUnhandledErrors crashes if an error is returned from a
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// handler.
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// Test runs in debug mode only.
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#if LLVM_ENABLE_ABI_BREAKING_CHECKS
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TEST(Error, FailureFromHandler) {
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auto ReturnErrorFromHandler = []() {
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handleAllErrors(make_error<CustomError>(7),
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[&](std::unique_ptr<CustomSubError> SE) {
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return Error(std::move(SE));
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});
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};
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EXPECT_DEATH(ReturnErrorFromHandler(),
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"Failure value returned from cantFail wrapped call\n"
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"CustomError \\{7\\}")
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<< " Error returned from handler in handleAllErrors call did not "
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"cause abort()";
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}
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#endif
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// Test that we can return values from handleErrors.
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TEST(Error, CatchErrorFromHandler) {
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int ErrorInfo = 0;
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Error E = handleErrors(
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make_error<CustomError>(7),
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[&](std::unique_ptr<CustomError> CE) { return Error(std::move(CE)); });
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handleAllErrors(std::move(E),
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[&](const CustomError &CE) { ErrorInfo = CE.getInfo(); });
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EXPECT_EQ(ErrorInfo, 7)
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<< "Failed to handle Error returned from handleErrors.";
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}
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TEST(Error, StringError) {
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std::string Msg;
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raw_string_ostream S(Msg);
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logAllUnhandledErrors(
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make_error<StringError>("foo" + Twine(42), inconvertibleErrorCode()), S);
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EXPECT_EQ(S.str(), "foo42\n") << "Unexpected StringError log result";
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auto EC =
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errorToErrorCode(make_error<StringError>("", errc::invalid_argument));
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EXPECT_EQ(EC, errc::invalid_argument)
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<< "Failed to convert StringError to error_code.";
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}
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TEST(Error, createStringError) {
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static const char *Bar = "bar";
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static const std::error_code EC = errc::invalid_argument;
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std::string Msg;
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raw_string_ostream S(Msg);
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logAllUnhandledErrors(createStringError(EC, "foo%s%d0x%" PRIx8, Bar, 1, 0xff),
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S);
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EXPECT_EQ(S.str(), "foobar10xff\n")
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<< "Unexpected createStringError() log result";
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S.flush();
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Msg.clear();
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logAllUnhandledErrors(createStringError(EC, Bar), S);
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EXPECT_EQ(S.str(), "bar\n")
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<< "Unexpected createStringError() (overloaded) log result";
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S.flush();
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Msg.clear();
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auto Res = errorToErrorCode(createStringError(EC, "foo%s", Bar));
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EXPECT_EQ(Res, EC)
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<< "Failed to convert createStringError() result to error_code.";
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}
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// Test that the ExitOnError utility works as expected.
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TEST(Error, ExitOnError) {
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ExitOnError ExitOnErr;
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ExitOnErr.setBanner("Error in tool:");
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ExitOnErr.setExitCodeMapper([](const Error &E) {
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if (E.isA<CustomSubError>())
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return 2;
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return 1;
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});
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// Make sure we don't bail on success.
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ExitOnErr(Error::success());
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EXPECT_EQ(ExitOnErr(Expected<int>(7)), 7)
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<< "exitOnError returned an invalid value for Expected";
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int A = 7;
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int &B = ExitOnErr(Expected<int&>(A));
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EXPECT_EQ(&A, &B) << "ExitOnError failed to propagate reference";
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// Exit tests.
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EXPECT_EXIT(ExitOnErr(make_error<CustomError>(7)),
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::testing::ExitedWithCode(1), "Error in tool:")
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<< "exitOnError returned an unexpected error result";
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EXPECT_EXIT(ExitOnErr(Expected<int>(make_error<CustomSubError>(0, 0))),
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::testing::ExitedWithCode(2), "Error in tool:")
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<< "exitOnError returned an unexpected error result";
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}
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// Test that the ExitOnError utility works as expected.
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TEST(Error, CantFailSuccess) {
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cantFail(Error::success());
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int X = cantFail(Expected<int>(42));
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EXPECT_EQ(X, 42) << "Expected value modified by cantFail";
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int Dummy = 42;
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int &Y = cantFail(Expected<int&>(Dummy));
|
|
EXPECT_EQ(&Dummy, &Y) << "Reference mangled by cantFail";
|
|
}
|
|
|
|
// Test that cantFail results in a crash if you pass it a failure value.
|
|
#if LLVM_ENABLE_ABI_BREAKING_CHECKS && !defined(NDEBUG)
|
|
TEST(Error, CantFailDeath) {
|
|
EXPECT_DEATH(cantFail(make_error<StringError>("Original error message",
|
|
inconvertibleErrorCode()),
|
|
"Cantfail call failed"),
|
|
"Cantfail call failed\n"
|
|
"Original error message")
|
|
<< "cantFail(Error) did not cause an abort for failure value";
|
|
|
|
EXPECT_DEATH(
|
|
{
|
|
auto IEC = inconvertibleErrorCode();
|
|
int X = cantFail(Expected<int>(make_error<StringError>("foo", IEC)));
|
|
(void)X;
|
|
},
|
|
"Failure value returned from cantFail wrapped call")
|
|
<< "cantFail(Expected<int>) did not cause an abort for failure value";
|
|
}
|
|
#endif
|
|
|
|
|
|
// Test Checked Expected<T> in success mode.
|
|
TEST(Error, CheckedExpectedInSuccessMode) {
|
|
Expected<int> A = 7;
|
|
EXPECT_TRUE(!!A) << "Expected with non-error value doesn't convert to 'true'";
|
|
// Access is safe in second test, since we checked the error in the first.
|
|
EXPECT_EQ(*A, 7) << "Incorrect Expected non-error value";
|
|
}
|
|
|
|
// Test Expected with reference type.
|
|
TEST(Error, ExpectedWithReferenceType) {
|
|
int A = 7;
|
|
Expected<int&> B = A;
|
|
// 'Check' B.
|
|
(void)!!B;
|
|
int &C = *B;
|
|
EXPECT_EQ(&A, &C) << "Expected failed to propagate reference";
|
|
}
|
|
|
|
// Test Unchecked Expected<T> in success mode.
|
|
// We expect this to blow up the same way Error would.
|
|
// Test runs in debug mode only.
|
|
#if LLVM_ENABLE_ABI_BREAKING_CHECKS
|
|
TEST(Error, UncheckedExpectedInSuccessModeDestruction) {
|
|
EXPECT_DEATH({ Expected<int> A = 7; },
|
|
"Expected<T> must be checked before access or destruction.")
|
|
<< "Unchecked Expected<T> success value did not cause an abort().";
|
|
}
|
|
#endif
|
|
|
|
// Test Unchecked Expected<T> in success mode.
|
|
// We expect this to blow up the same way Error would.
|
|
// Test runs in debug mode only.
|
|
#if LLVM_ENABLE_ABI_BREAKING_CHECKS
|
|
TEST(Error, UncheckedExpectedInSuccessModeAccess) {
|
|
EXPECT_DEATH(
|
|
{
|
|
const Expected<int> A = 7;
|
|
*A;
|
|
},
|
|
"Expected<T> must be checked before access or destruction.")
|
|
<< "Unchecked Expected<T> success value did not cause an abort().";
|
|
}
|
|
#endif
|
|
|
|
// Test Unchecked Expected<T> in success mode.
|
|
// We expect this to blow up the same way Error would.
|
|
// Test runs in debug mode only.
|
|
#if LLVM_ENABLE_ABI_BREAKING_CHECKS
|
|
TEST(Error, UncheckedExpectedInSuccessModeAssignment) {
|
|
EXPECT_DEATH(
|
|
{
|
|
Expected<int> A = 7;
|
|
A = 7;
|
|
},
|
|
"Expected<T> must be checked before access or destruction.")
|
|
<< "Unchecked Expected<T> success value did not cause an abort().";
|
|
}
|
|
#endif
|
|
|
|
// Test Expected<T> in failure mode.
|
|
TEST(Error, ExpectedInFailureMode) {
|
|
Expected<int> A = make_error<CustomError>(42);
|
|
EXPECT_FALSE(!!A) << "Expected with error value doesn't convert to 'false'";
|
|
Error E = A.takeError();
|
|
EXPECT_TRUE(E.isA<CustomError>()) << "Incorrect Expected error value";
|
|
consumeError(std::move(E));
|
|
}
|
|
|
|
// Check that an Expected instance with an error value doesn't allow access to
|
|
// operator*.
|
|
// Test runs in debug mode only.
|
|
#if LLVM_ENABLE_ABI_BREAKING_CHECKS
|
|
TEST(Error, AccessExpectedInFailureMode) {
|
|
Expected<int> A = make_error<CustomError>(42);
|
|
EXPECT_DEATH(*A, "Expected<T> must be checked before access or destruction.")
|
|
<< "Incorrect Expected error value";
|
|
consumeError(A.takeError());
|
|
}
|
|
#endif
|
|
|
|
// Check that an Expected instance with an error triggers an abort if
|
|
// unhandled.
|
|
// Test runs in debug mode only.
|
|
#if LLVM_ENABLE_ABI_BREAKING_CHECKS
|
|
TEST(Error, UnhandledExpectedInFailureMode) {
|
|
EXPECT_DEATH({ Expected<int> A = make_error<CustomError>(42); },
|
|
"Expected<T> must be checked before access or destruction.")
|
|
<< "Unchecked Expected<T> failure value did not cause an abort()";
|
|
}
|
|
#endif
|
|
|
|
// Test covariance of Expected.
|
|
TEST(Error, ExpectedCovariance) {
|
|
class B {};
|
|
class D : public B {};
|
|
|
|
Expected<B *> A1(Expected<D *>(nullptr));
|
|
// Check A1 by converting to bool before assigning to it.
|
|
(void)!!A1;
|
|
A1 = Expected<D *>(nullptr);
|
|
// Check A1 again before destruction.
|
|
(void)!!A1;
|
|
|
|
Expected<std::unique_ptr<B>> A2(Expected<std::unique_ptr<D>>(nullptr));
|
|
// Check A2 by converting to bool before assigning to it.
|
|
(void)!!A2;
|
|
A2 = Expected<std::unique_ptr<D>>(nullptr);
|
|
// Check A2 again before destruction.
|
|
(void)!!A2;
|
|
}
|
|
|
|
// Test that handleExpected just returns success values.
|
|
TEST(Error, HandleExpectedSuccess) {
|
|
auto ValOrErr =
|
|
handleExpected(Expected<int>(42),
|
|
[]() { return Expected<int>(43); });
|
|
EXPECT_TRUE(!!ValOrErr)
|
|
<< "handleExpected should have returned a success value here";
|
|
EXPECT_EQ(*ValOrErr, 42)
|
|
<< "handleExpected should have returned the original success value here";
|
|
}
|
|
|
|
enum FooStrategy { Aggressive, Conservative };
|
|
|
|
static Expected<int> foo(FooStrategy S) {
|
|
if (S == Aggressive)
|
|
return make_error<CustomError>(7);
|
|
return 42;
|
|
}
|
|
|
|
// Test that handleExpected invokes the error path if errors are not handled.
|
|
TEST(Error, HandleExpectedUnhandledError) {
|
|
// foo(Aggressive) should return a CustomError which should pass through as
|
|
// there is no handler for CustomError.
|
|
auto ValOrErr =
|
|
handleExpected(
|
|
foo(Aggressive),
|
|
[]() { return foo(Conservative); });
|
|
|
|
EXPECT_FALSE(!!ValOrErr)
|
|
<< "handleExpected should have returned an error here";
|
|
auto Err = ValOrErr.takeError();
|
|
EXPECT_TRUE(Err.isA<CustomError>())
|
|
<< "handleExpected should have returned the CustomError generated by "
|
|
"foo(Aggressive) here";
|
|
consumeError(std::move(Err));
|
|
}
|
|
|
|
// Test that handleExpected invokes the fallback path if errors are handled.
|
|
TEST(Error, HandleExpectedHandledError) {
|
|
// foo(Aggressive) should return a CustomError which should handle triggering
|
|
// the fallback path.
|
|
auto ValOrErr =
|
|
handleExpected(
|
|
foo(Aggressive),
|
|
[]() { return foo(Conservative); },
|
|
[](const CustomError&) { /* do nothing */ });
|
|
|
|
EXPECT_TRUE(!!ValOrErr)
|
|
<< "handleExpected should have returned a success value here";
|
|
EXPECT_EQ(*ValOrErr, 42)
|
|
<< "handleExpected returned the wrong success value";
|
|
}
|
|
|
|
TEST(Error, ErrorCodeConversions) {
|
|
// Round-trip a success value to check that it converts correctly.
|
|
EXPECT_EQ(errorToErrorCode(errorCodeToError(std::error_code())),
|
|
std::error_code())
|
|
<< "std::error_code() should round-trip via Error conversions";
|
|
|
|
// Round-trip an error value to check that it converts correctly.
|
|
EXPECT_EQ(errorToErrorCode(errorCodeToError(errc::invalid_argument)),
|
|
errc::invalid_argument)
|
|
<< "std::error_code error value should round-trip via Error "
|
|
"conversions";
|
|
|
|
// Round-trip a success value through ErrorOr/Expected to check that it
|
|
// converts correctly.
|
|
{
|
|
auto Orig = ErrorOr<int>(42);
|
|
auto RoundTripped =
|
|
expectedToErrorOr(errorOrToExpected(ErrorOr<int>(42)));
|
|
EXPECT_EQ(*Orig, *RoundTripped)
|
|
<< "ErrorOr<T> success value should round-trip via Expected<T> "
|
|
"conversions.";
|
|
}
|
|
|
|
// Round-trip a failure value through ErrorOr/Expected to check that it
|
|
// converts correctly.
|
|
{
|
|
auto Orig = ErrorOr<int>(errc::invalid_argument);
|
|
auto RoundTripped =
|
|
expectedToErrorOr(
|
|
errorOrToExpected(ErrorOr<int>(errc::invalid_argument)));
|
|
EXPECT_EQ(Orig.getError(), RoundTripped.getError())
|
|
<< "ErrorOr<T> failure value should round-trip via Expected<T> "
|
|
"conversions.";
|
|
}
|
|
}
|
|
|
|
// Test that error messages work.
|
|
TEST(Error, ErrorMessage) {
|
|
EXPECT_EQ(toString(Error::success()).compare(""), 0);
|
|
|
|
Error E1 = make_error<CustomError>(0);
|
|
EXPECT_EQ(toString(std::move(E1)).compare("CustomError {0}"), 0);
|
|
|
|
Error E2 = make_error<CustomError>(0);
|
|
handleAllErrors(std::move(E2), [](const CustomError &CE) {
|
|
EXPECT_EQ(CE.message().compare("CustomError {0}"), 0);
|
|
});
|
|
|
|
Error E3 = joinErrors(make_error<CustomError>(0), make_error<CustomError>(1));
|
|
EXPECT_EQ(toString(std::move(E3))
|
|
.compare("CustomError {0}\n"
|
|
"CustomError {1}"),
|
|
0);
|
|
}
|
|
|
|
TEST(Error, Stream) {
|
|
{
|
|
Error OK = Error::success();
|
|
std::string Buf;
|
|
llvm::raw_string_ostream S(Buf);
|
|
S << OK;
|
|
EXPECT_EQ("success", S.str());
|
|
consumeError(std::move(OK));
|
|
}
|
|
{
|
|
Error E1 = make_error<CustomError>(0);
|
|
std::string Buf;
|
|
llvm::raw_string_ostream S(Buf);
|
|
S << E1;
|
|
EXPECT_EQ("CustomError {0}", S.str());
|
|
consumeError(std::move(E1));
|
|
}
|
|
}
|
|
|
|
TEST(Error, SucceededMatcher) {
|
|
EXPECT_THAT_ERROR(Error::success(), Succeeded());
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_ERROR(make_error<CustomError>(0), Succeeded()),
|
|
"Expected: succeeded\n Actual: failed (CustomError {0})");
|
|
|
|
EXPECT_THAT_EXPECTED(Expected<int>(0), Succeeded());
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(0)),
|
|
Succeeded()),
|
|
"Expected: succeeded\n Actual: failed (CustomError {0})");
|
|
int a = 1;
|
|
EXPECT_THAT_EXPECTED(Expected<int &>(a), Succeeded());
|
|
}
|
|
|
|
TEST(Error, FailedMatcher) {
|
|
EXPECT_THAT_ERROR(make_error<CustomError>(0), Failed());
|
|
EXPECT_NONFATAL_FAILURE(EXPECT_THAT_ERROR(Error::success(), Failed()),
|
|
"Expected: failed\n Actual: succeeded");
|
|
|
|
EXPECT_THAT_ERROR(make_error<CustomError>(0), Failed<CustomError>());
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_ERROR(Error::success(), Failed<CustomError>()),
|
|
"Expected: failed with Error of given type\n Actual: succeeded");
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_ERROR(make_error<CustomError>(0), Failed<CustomSubError>()),
|
|
"Error was not of given type");
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_ERROR(
|
|
joinErrors(make_error<CustomError>(0), make_error<CustomError>(1)),
|
|
Failed<CustomError>()),
|
|
"multiple errors");
|
|
|
|
EXPECT_THAT_ERROR(
|
|
make_error<CustomError>(0),
|
|
Failed<CustomError>(testing::Property(&CustomError::getInfo, 0)));
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_ERROR(
|
|
make_error<CustomError>(0),
|
|
Failed<CustomError>(testing::Property(&CustomError::getInfo, 1))),
|
|
"Expected: failed with Error of given type and the error is an object "
|
|
"whose given property is equal to 1\n"
|
|
" Actual: failed (CustomError {0})");
|
|
EXPECT_THAT_ERROR(make_error<CustomError>(0), Failed<ErrorInfoBase>());
|
|
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(0)), Failed());
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(0), Failed()),
|
|
"Expected: failed\n Actual: succeeded with value 0");
|
|
EXPECT_THAT_EXPECTED(Expected<int &>(make_error<CustomError>(0)), Failed());
|
|
}
|
|
|
|
TEST(Error, HasValueMatcher) {
|
|
EXPECT_THAT_EXPECTED(Expected<int>(0), HasValue(0));
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(0)),
|
|
HasValue(0)),
|
|
"Expected: succeeded with value (is equal to 0)\n"
|
|
" Actual: failed (CustomError {0})");
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(1), HasValue(0)),
|
|
"Expected: succeeded with value (is equal to 0)\n"
|
|
" Actual: succeeded with value 1, (isn't equal to 0)");
|
|
|
|
int a = 1;
|
|
EXPECT_THAT_EXPECTED(Expected<int &>(a), HasValue(testing::Eq(1)));
|
|
|
|
EXPECT_THAT_EXPECTED(Expected<int>(1), HasValue(testing::Gt(0)));
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(0), HasValue(testing::Gt(1))),
|
|
"Expected: succeeded with value (is > 1)\n"
|
|
" Actual: succeeded with value 0, (isn't > 1)");
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(0)),
|
|
HasValue(testing::Gt(1))),
|
|
"Expected: succeeded with value (is > 1)\n"
|
|
" Actual: failed (CustomError {0})");
|
|
}
|
|
|
|
TEST(Error, FailedWithMessageMatcher) {
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(0)),
|
|
FailedWithMessage("CustomError {0}"));
|
|
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(1)),
|
|
FailedWithMessage("CustomError {0}")),
|
|
"Expected: failed with Error whose message has 1 element that is equal "
|
|
"to \"CustomError {0}\"\n"
|
|
" Actual: failed (CustomError {1})");
|
|
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(0),
|
|
FailedWithMessage("CustomError {0}")),
|
|
"Expected: failed with Error whose message has 1 element that is equal "
|
|
"to \"CustomError {0}\"\n"
|
|
" Actual: succeeded with value 0");
|
|
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(Expected<int>(make_error<CustomError>(0)),
|
|
FailedWithMessage("CustomError {0}", "CustomError {0}")),
|
|
"Expected: failed with Error whose message has 2 elements where\n"
|
|
"element #0 is equal to \"CustomError {0}\",\n"
|
|
"element #1 is equal to \"CustomError {0}\"\n"
|
|
" Actual: failed (CustomError {0}), which has 1 element");
|
|
|
|
EXPECT_NONFATAL_FAILURE(
|
|
EXPECT_THAT_EXPECTED(
|
|
Expected<int>(joinErrors(make_error<CustomError>(0),
|
|
make_error<CustomError>(0))),
|
|
FailedWithMessage("CustomError {0}")),
|
|
"Expected: failed with Error whose message has 1 element that is equal "
|
|
"to \"CustomError {0}\"\n"
|
|
" Actual: failed (CustomError {0}; CustomError {0}), which has 2 elements");
|
|
|
|
EXPECT_THAT_ERROR(
|
|
joinErrors(make_error<CustomError>(0), make_error<CustomError>(0)),
|
|
FailedWithMessageArray(testing::SizeIs(2)));
|
|
}
|
|
|
|
TEST(Error, C_API) {
|
|
EXPECT_THAT_ERROR(unwrap(wrap(Error::success())), Succeeded())
|
|
<< "Failed to round-trip Error success value via C API";
|
|
EXPECT_THAT_ERROR(unwrap(wrap(make_error<CustomError>(0))),
|
|
Failed<CustomError>())
|
|
<< "Failed to round-trip Error failure value via C API";
|
|
|
|
auto Err =
|
|
wrap(make_error<StringError>("test message", inconvertibleErrorCode()));
|
|
EXPECT_EQ(LLVMGetErrorTypeId(Err), LLVMGetStringErrorTypeId())
|
|
<< "Failed to match error type ids via C API";
|
|
char *ErrMsg = LLVMGetErrorMessage(Err);
|
|
EXPECT_STREQ(ErrMsg, "test message")
|
|
<< "Failed to roundtrip StringError error message via C API";
|
|
LLVMDisposeErrorMessage(ErrMsg);
|
|
|
|
bool GotCSE = false;
|
|
bool GotCE = false;
|
|
handleAllErrors(
|
|
unwrap(wrap(joinErrors(make_error<CustomSubError>(42, 7),
|
|
make_error<CustomError>(42)))),
|
|
[&](CustomSubError &CSE) {
|
|
GotCSE = true;
|
|
},
|
|
[&](CustomError &CE) {
|
|
GotCE = true;
|
|
});
|
|
EXPECT_TRUE(GotCSE) << "Failed to round-trip ErrorList via C API";
|
|
EXPECT_TRUE(GotCE) << "Failed to round-trip ErrorList via C API";
|
|
}
|
|
|
|
TEST(Error, FileErrorTest) {
|
|
#if !defined(NDEBUG) && GTEST_HAS_DEATH_TEST
|
|
EXPECT_DEATH(
|
|
{
|
|
Error S = Error::success();
|
|
consumeError(createFileError("file.bin", std::move(S)));
|
|
},
|
|
"");
|
|
#endif
|
|
// Not allowed, would fail at compile-time
|
|
//consumeError(createFileError("file.bin", ErrorSuccess()));
|
|
|
|
Error E1 = make_error<CustomError>(1);
|
|
Error FE1 = createFileError("file.bin", std::move(E1));
|
|
EXPECT_EQ(toString(std::move(FE1)).compare("'file.bin': CustomError {1}"), 0);
|
|
|
|
Error E2 = make_error<CustomError>(2);
|
|
Error FE2 = createFileError("file.bin", std::move(E2));
|
|
handleAllErrors(std::move(FE2), [](const FileError &F) {
|
|
EXPECT_EQ(F.message().compare("'file.bin': CustomError {2}"), 0);
|
|
});
|
|
|
|
Error E3 = make_error<CustomError>(3);
|
|
Error FE3 = createFileError("file.bin", std::move(E3));
|
|
auto E31 = handleErrors(std::move(FE3), [](std::unique_ptr<FileError> F) {
|
|
return F->takeError();
|
|
});
|
|
handleAllErrors(std::move(E31), [](const CustomError &C) {
|
|
EXPECT_EQ(C.message().compare("CustomError {3}"), 0);
|
|
});
|
|
|
|
Error FE4 =
|
|
joinErrors(createFileError("file.bin", make_error<CustomError>(41)),
|
|
createFileError("file2.bin", make_error<CustomError>(42)));
|
|
EXPECT_EQ(toString(std::move(FE4))
|
|
.compare("'file.bin': CustomError {41}\n"
|
|
"'file2.bin': CustomError {42}"),
|
|
0);
|
|
}
|
|
|
|
enum class test_error_code {
|
|
unspecified = 1,
|
|
error_1,
|
|
error_2,
|
|
};
|
|
|
|
} // end anon namespace
|
|
|
|
namespace std {
|
|
template <>
|
|
struct is_error_code_enum<test_error_code> : std::true_type {};
|
|
} // namespace std
|
|
|
|
namespace {
|
|
|
|
const std::error_category &TErrorCategory();
|
|
|
|
inline std::error_code make_error_code(test_error_code E) {
|
|
return std::error_code(static_cast<int>(E), TErrorCategory());
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|
}
|
|
|
|
class TestDebugError : public ErrorInfo<TestDebugError, StringError> {
|
|
public:
|
|
using ErrorInfo<TestDebugError, StringError >::ErrorInfo; // inherit constructors
|
|
TestDebugError(const Twine &S) : ErrorInfo(S, test_error_code::unspecified) {}
|
|
static char ID;
|
|
};
|
|
|
|
class TestErrorCategory : public std::error_category {
|
|
public:
|
|
const char *name() const noexcept override { return "error"; }
|
|
std::string message(int Condition) const override {
|
|
switch (static_cast<test_error_code>(Condition)) {
|
|
case test_error_code::unspecified:
|
|
return "An unknown error has occurred.";
|
|
case test_error_code::error_1:
|
|
return "Error 1.";
|
|
case test_error_code::error_2:
|
|
return "Error 2.";
|
|
}
|
|
llvm_unreachable("Unrecognized test_error_code");
|
|
}
|
|
};
|
|
|
|
static llvm::ManagedStatic<TestErrorCategory> TestErrCategory;
|
|
const std::error_category &TErrorCategory() { return *TestErrCategory; }
|
|
|
|
char TestDebugError::ID;
|
|
|
|
TEST(Error, SubtypeStringErrorTest) {
|
|
auto E1 = make_error<TestDebugError>(test_error_code::error_1);
|
|
EXPECT_EQ(toString(std::move(E1)).compare("Error 1."), 0);
|
|
|
|
auto E2 = make_error<TestDebugError>(test_error_code::error_1,
|
|
"Detailed information");
|
|
EXPECT_EQ(toString(std::move(E2)).compare("Error 1. Detailed information"),
|
|
0);
|
|
|
|
auto E3 = make_error<TestDebugError>(test_error_code::error_2);
|
|
handleAllErrors(std::move(E3), [](const TestDebugError &F) {
|
|
EXPECT_EQ(F.message().compare("Error 2."), 0);
|
|
});
|
|
|
|
auto E4 = joinErrors(make_error<TestDebugError>(test_error_code::error_1,
|
|
"Detailed information"),
|
|
make_error<TestDebugError>(test_error_code::error_2));
|
|
EXPECT_EQ(toString(std::move(E4))
|
|
.compare("Error 1. Detailed information\n"
|
|
"Error 2."),
|
|
0);
|
|
}
|
|
|
|
} // namespace
|