1 // Copyright 2023 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include "gtest/gtest.h" 17 #include "pw_async/fake_dispatcher.h" 18 19 namespace pw::async::test { 20 21 /// Test fixture that is a simple wrapper around a FakeDispatcher. 22 /// 23 /// Example: 24 /// @code{.cpp} 25 /// using ExampleTest = pw::async::test::FakeDispatcherFixture; 26 /// 27 /// TEST_F(ExampleTest, Example) { 28 /// MyClass obj(dispatcher()); 29 /// 30 /// obj.ScheduleSomeTasks(); 31 /// RunUntilIdle(); 32 /// EXPECT_TRUE(some condition); 33 /// 34 /// obj.ScheduleTaskToRunIn30Seconds(); 35 /// RunFor(30s); 36 /// EXPECT_TRUE(task ran); 37 /// } 38 /// @endcode 39 class FakeDispatcherFixture : public ::testing::Test { 40 public: 41 /// Returns the FakeDispatcher that should be used for dependency injection. dispatcher()42 FakeDispatcher& dispatcher() { return dispatcher_; } 43 44 /// Returns the current fake time. now()45 chrono::SystemClock::time_point now() { return dispatcher_.now(); } 46 47 /// Dispatches all tasks with due times up until `now()`. RunUntilIdle()48 void RunUntilIdle() { dispatcher_.RunUntilIdle(); } 49 50 /// Dispatches all tasks with due times up to `end_time`, progressively 51 /// advancing the fake clock. RunUntil(chrono::SystemClock::time_point end_time)52 void RunUntil(chrono::SystemClock::time_point end_time) { 53 dispatcher_.RunUntil(end_time); 54 } 55 56 /// Dispatches all tasks with due times up to `now() + duration`, 57 /// progressively advancing the fake clock. RunFor(chrono::SystemClock::duration duration)58 void RunFor(chrono::SystemClock::duration duration) { 59 dispatcher_.RunFor(duration); 60 } 61 62 private: 63 FakeDispatcher dispatcher_; 64 }; 65 66 } // namespace pw::async::test 67