136 lines
3.1 KiB
C++
136 lines
3.1 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <AtomicState.h>
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#include <chrono>
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#include <thread>
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#include <gtest/gtest.h>
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using namespace std::chrono_literals;
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namespace android {
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enum AtomicStateTestEnum {
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A,
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B,
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C,
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D,
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E,
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};
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class AtomicStateTest : public testing::Test {
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protected:
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AtomicStateTest() : state_(A) {}
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virtual void SetUp() {}
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virtual void TearDown() {}
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AtomicState<AtomicStateTestEnum> state_;
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};
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TEST_F(AtomicStateTest, transition) {
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ASSERT_EQ(A, state_.state_);
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// Starts as A, transition from B fails
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ASSERT_FALSE(state_.transition(B, C));
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ASSERT_EQ(A, state_.state_);
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// transition from A to B
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ASSERT_TRUE(state_.transition(A, B));
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ASSERT_EQ(B, state_.state_);
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// State is B, transition from A fails
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ASSERT_FALSE(state_.transition(A, B));
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ASSERT_EQ(B, state_.state_);
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// State is B, transition_or from A calls the lambda
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bool lambda = false;
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bool already_locked = false;
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state_.transition_or(A, B, [&] {
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// The lock should be held in the lambda
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if (state_.m_.try_lock()) {
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state_.m_.unlock();
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} else {
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already_locked = true;
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}
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lambda = true;
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return B;
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});
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ASSERT_TRUE(lambda);
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ASSERT_TRUE(already_locked);
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ASSERT_EQ(B, state_.state_);
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// State is C, transition_or from B to C does not call the lambda
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lambda = false;
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state_.transition_or(B, C, [&] {
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lambda = true;
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return C;
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});
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ASSERT_FALSE(lambda);
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ASSERT_EQ(C, state_.state_);
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}
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TEST_F(AtomicStateTest, wait) {
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ASSERT_EQ(A, state_.state_);
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// Starts as A, wait_for_either_of B, C returns false
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ASSERT_FALSE(state_.wait_for_either_of(B, C, 10ms));
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// Starts as A, wait_for_either_of A, B returns true
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ASSERT_TRUE(state_.wait_for_either_of(A, B, 1s));
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{
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std::thread t([&] {
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usleep(10000);
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state_.set(B);
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});
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// Wait ing for B or C returns true after state is set to B
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ASSERT_TRUE(state_.wait_for_either_of(B, C, 1s));
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t.join();
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}
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ASSERT_EQ(B, state_.state_);
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{
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std::thread t([&] {
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usleep(10000);
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state_.transition(B, C);
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});
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// Waiting for A or C returns true after state is transitioned to C
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ASSERT_TRUE(state_.wait_for_either_of(A, C, 1s));
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t.join();
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}
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ASSERT_EQ(C, state_.state_);
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{
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std::thread t([&] {
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usleep(10000);
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state_.transition(C, D);
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});
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// Waiting for A or B returns false after state is transitioned to D
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ASSERT_FALSE(state_.wait_for_either_of(A, B, 100ms));
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t.join();
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}
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}
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} // namespace android
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