| /* |
| * Copyright (C) 2017 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 androidx.lifecycle; |
| |
| import static androidx.lifecycle.Lifecycle.Event.ON_START; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| import androidx.annotation.Nullable; |
| import androidx.arch.core.executor.JunitTaskExecutorRule; |
| import androidx.arch.core.executor.TaskExecutor; |
| |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| @RunWith(JUnit4.class) |
| public class ThreadedLiveDataTest { |
| |
| private static final int TIMEOUT_SECS = 3; |
| |
| @Rule |
| public JunitTaskExecutorRule mTaskExecutorRule = new JunitTaskExecutorRule(1, false); |
| |
| private LiveData<String> mLiveData; |
| private LifecycleOwner mLifecycleOwner; |
| private LifecycleRegistry mRegistry; |
| |
| @Before |
| public void init() { |
| mLiveData = new MutableLiveData<>(); |
| mLifecycleOwner = mock(LifecycleOwner.class); |
| mRegistry = new LifecycleRegistry(mLifecycleOwner); |
| when(mLifecycleOwner.getLifecycle()).thenReturn(mRegistry); |
| } |
| |
| @Test |
| public void testPostValue() throws InterruptedException { |
| final TaskExecutor taskExecutor = mTaskExecutorRule.getTaskExecutor(); |
| final CountDownLatch finishTestLatch = new CountDownLatch(1); |
| final Observer<String> observer = new Observer<String>() { |
| @Override |
| public void onChanged(@Nullable String newValue) { |
| try { |
| assertThat(taskExecutor.isMainThread(), is(true)); |
| assertThat(newValue, is("success")); |
| } finally { |
| finishTestLatch.countDown(); |
| } |
| } |
| }; |
| taskExecutor.executeOnMainThread(new Runnable() { |
| @Override |
| public void run() { |
| mRegistry.handleLifecycleEvent(ON_START); |
| mLiveData.observe(mLifecycleOwner, observer); |
| final CountDownLatch latch = new CountDownLatch(1); |
| taskExecutor.executeOnDiskIO(new Runnable() { |
| @Override |
| public void run() { |
| mLiveData.postValue("fail"); |
| mLiveData.postValue("success"); |
| latch.countDown(); |
| } |
| }); |
| try { |
| assertThat(latch.await(TIMEOUT_SECS, TimeUnit.SECONDS), is(true)); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| assertThat(finishTestLatch.await(TIMEOUT_SECS, TimeUnit.SECONDS), is(true)); |
| } |
| } |