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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_TEST_HELPERS_H_
#define ANDROID_TEST_HELPERS_H_
#include <future>
#include <thread>
namespace android {
/**
* Runs the given function after the specified delay.
* NOTE: if the std::future returned from std::async is not bound, this function
* will block until the task completes. This is almost certainly NOT what you
* want, so save the return value from delay_async into a variable:
*
* auto f = delay_async(100ms, []{ ALOGD("Hello world"); });
*/
template<class Function, class Duration>
decltype(auto) delay_async(Duration&& delay, Function&& task)
{
return std::async(std::launch::async, [=]{ std::this_thread::sleep_for(delay); task(); });
}
/**
* Creates and opens a temporary file at the given path. The file is unlinked
* and closed in the destructor.
*/
class TempFile {
public:
TempFile(const char* path);
~TempFile();
// No copy or assign
TempFile(const TempFile&) = delete;
TempFile& operator=(const TempFile&) = delete;
const char* getName() const { return mName; }
int getFd() const { return mFd; }
private:
char* mName;
int mFd;
};
/**
* Creates a temporary directory that can create temporary files. The directory
* is emptied and deleted in the destructor.
*/
class TempDir {
public:
TempDir();
~TempDir();
// No copy or assign
TempDir(const TempDir&) = delete;
TempDir& operator=(const TempDir&) = delete;
const char* getName() const { return mName; }
TempFile* newTempFile();
private:
char* mName;
};
} // namespace android
#endif // ANDROID_TEST_HELPERS_H_
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