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Summary: This makes it possible to run an arbitrary matcher on the value contained within the Expected<T> object. To do this, I've needed to fully spell out the matcher, instead of using the shorthand MATCHER_P macro. The slight gotcha here is that standard template deduction will fail if one tries to match HasValue(47) against an Expected<int &> -- the workaround is to use HasValue(testing::Eq(47)). The explanations produced by this matcher have changed a bit, since now we delegate to the nested matcher to print the value. Since these don't put quotes around the value, I've changed our PrintTo methods to match. Reviewers: zturner Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D41065 llvm-svn: 320561
50 lines
1.3 KiB
C++
50 lines
1.3 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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#include "gtest/gtest-printers.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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ExpectedHolder(ErrorHolder Err, Expected<T> &Exp)
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: ErrorHolder(std::move(Err)), Exp(Exp) {}
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Expected<T> &Exp;
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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.Exp);
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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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