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/*
* Copyright (C) 2016 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.
*/
package com.android.settingslib.utils;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.fail;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.shadows.ShadowLooper;
@RunWith(RobolectricTestRunner.class)
public class ThreadUtilsTest {
@Test
public void testMainThread() throws InterruptedException {
assertThat(ThreadUtils.isMainThread()).isTrue();
Thread background = new Thread(() -> assertThat(ThreadUtils.isMainThread()).isFalse());
background.start();
background.join();
}
@Test
public void testEnsureMainThread() throws InterruptedException {
ThreadUtils.ensureMainThread();
Thread background = new Thread(() -> {
try {
ThreadUtils.ensureMainThread();
fail("Should not pass ensureMainThread in a background thread");
} catch (RuntimeException expected) {
}
});
background.start();
background.join();
}
@Test
public void testPostOnMainThread_shouldRunOnMainThread() {
TestRunnable cr = new TestRunnable();
ShadowLooper.pauseMainLooper();
ThreadUtils.postOnMainThread(cr);
assertThat(cr.called).isFalse();
ShadowLooper.runUiThreadTasks();
assertThat(cr.called).isTrue();
assertThat(cr.onUiThread).isTrue();
}
private static class TestRunnable implements Runnable {
volatile boolean called;
volatile boolean onUiThread;
public void run() {
this.called = true;
this.onUiThread = ThreadUtils.isMainThread();
}
}
}
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