naiveproxy/base/test/bind_test_util.h
2018-12-09 21:59:24 -05:00

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1.0 KiB
C++

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TEST_BIND_TEST_UTIL_H_
#define BASE_TEST_BIND_TEST_UTIL_H_
#include "base/bind.h"
namespace base {
namespace internal {
template <typename F, typename Signature>
struct BindLambdaHelper;
template <typename F, typename R, typename... Args>
struct BindLambdaHelper<F, R(Args...)> {
static R Run(const std::decay_t<F>& f, Args... args) {
return f(std::forward<Args>(args)...);
}
};
} // namespace internal
// A variant of Bind() that can bind capturing lambdas for testing.
// This doesn't support extra arguments binding as the lambda itself can do.
template <typename F>
decltype(auto) BindLambdaForTesting(F&& f) {
using Signature = internal::ExtractCallableRunType<std::decay_t<F>>;
return BindRepeating(&internal::BindLambdaHelper<F, Signature>::Run,
std::forward<F>(f));
}
} // namespace base
#endif // BASE_TEST_BIND_TEST_UTIL_H_