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83a953d909
Many times unit tests for different libraries would like to use the same helper functions for checking common types of errors. This patch adds a common library with helpers for testing things in Support, and introduces helpers in here for integrating the llvm::Error and llvm::Expected<T> classes with gtest and gmock. Normally, we would just be able to write: EXPECT_THAT(someFunction(), succeeded()); but due to some quirks in llvm::Error's move semantics, gmock doesn't make this easy, so two macros EXPECT_THAT_ERROR() and EXPECT_THAT_EXPECTED() are introduced to gloss over the difficulties. Consider this an exception, and possibly only temporary as we look for ways to improve this. Differential Revision: https://reviews.llvm.org/D33059 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305395 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
//===- Testing/Support/SupportHelpers.h -----------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TESTING_SUPPORT_SUPPORTHELPERS_H
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#define LLVM_TESTING_SUPPORT_SUPPORTHELPERS_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace detail {
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struct ErrorHolder {
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bool Success;
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std::string Message;
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};
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template <typename T> struct ExpectedHolder : public ErrorHolder {
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Optional<T *> Value;
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};
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inline void PrintTo(const ErrorHolder &Err, std::ostream *Out) {
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*Out << (Err.Success ? "succeeded" : "failed");
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if (!Err.Success) {
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*Out << " (" << StringRef(Err.Message).trim().str() << ")";
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}
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}
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template <typename T>
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void PrintTo(const ExpectedHolder<T> &Item, std::ostream *Out) {
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if (Item.Success) {
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*Out << "succeeded with value \"" << testing::PrintToString(**Item.Value)
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<< "\"";
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} else {
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PrintTo(static_cast<const ErrorHolder &>(Item), Out);
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}
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}
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} // namespace detail
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} // namespace llvm
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#endif
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