1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_TEST_HELPERS_H_ 18 #define ANDROID_TEST_HELPERS_H_ 19 20 #include <future> 21 #include <thread> 22 23 namespace android { 24 25 /** 26 * Runs the given function after the specified delay. 27 * NOTE: if the std::future returned from std::async is not bound, this function 28 * will block until the task completes. This is almost certainly NOT what you 29 * want, so save the return value from delay_async into a variable: 30 * 31 * auto f = delay_async(100ms, []{ ALOGD("Hello world"); }); 32 */ 33 template<class Function, class Duration> 34 decltype(auto) delay_async(Duration&& delay, Function&& task) 35 { 36 return std::async(std::launch::async, [=]{ std::this_thread::sleep_for(delay); task(); }); 37 } 38 39 /** 40 * Creates and opens a temporary file at the given path. The file is unlinked 41 * and closed in the destructor. 42 */ 43 class TempFile { 44 public: 45 explicit TempFile(const char* path); 46 ~TempFile(); 47 48 // No copy or assign 49 TempFile(const TempFile&) = delete; 50 TempFile& operator=(const TempFile&) = delete; 51 52 const char* getName() const { return mName; } 53 int getFd() const { return mFd; } 54 55 private: 56 char* mName; 57 int mFd; 58 }; 59 60 /** 61 * Creates a temporary directory that can create temporary files. The directory 62 * is emptied and deleted in the destructor. 63 */ 64 class TempDir { 65 public: 66 TempDir(); 67 ~TempDir(); 68 69 // No copy or assign 70 TempDir(const TempDir&) = delete; 71 TempDir& operator=(const TempDir&) = delete; 72 73 const char* getName() const { return mName; } 74 75 TempFile* newTempFile(); 76 77 private: 78 char* mName; 79 }; 80 81 } // namespace android 82 83 #endif // ANDROID_TEST_HELPERS_H_ 84
