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#include <gtest/gtest.h>
#include <condition_variable>
#include "BackgroundExecutor.h"
namespace android {
class BackgroundExecutorTest : public testing::Test {};
namespace {
TEST_F(BackgroundExecutorTest, singleProducer) {
std::mutex mutex;
std::condition_variable condition_variable;
bool backgroundTaskComplete = false;
BackgroundExecutor::getInstance().sendCallbacks(
{[&mutex, &condition_variable, &backgroundTaskComplete]() {
std::lock_guard<std::mutex> lock{mutex};
condition_variable.notify_one();
backgroundTaskComplete = true;
}});
std::unique_lock<std::mutex> lock{mutex};
condition_variable.wait(lock, [&backgroundTaskComplete]() { return backgroundTaskComplete; });
ASSERT_TRUE(backgroundTaskComplete);
}
TEST_F(BackgroundExecutorTest, multipleProducers) {
std::mutex mutex;
std::condition_variable condition_variable;
const int backgroundTaskCount = 10;
int backgroundTaskCompleteCount = 0;
for (int i = 0; i < backgroundTaskCount; i++) {
std::thread([&mutex, &condition_variable, &backgroundTaskCompleteCount]() {
BackgroundExecutor::getInstance().sendCallbacks(
{[&mutex, &condition_variable, &backgroundTaskCompleteCount]() {
std::lock_guard<std::mutex> lock{mutex};
backgroundTaskCompleteCount++;
if (backgroundTaskCompleteCount == backgroundTaskCount) {
condition_variable.notify_one();
}
}});
}).detach();
}
std::unique_lock<std::mutex> lock{mutex};
condition_variable.wait(lock, [&backgroundTaskCompleteCount]() {
return backgroundTaskCompleteCount == backgroundTaskCount;
});
ASSERT_EQ(backgroundTaskCount, backgroundTaskCompleteCount);
}
} // namespace
} // namespace android
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