| /* |
| * 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.arch.core.executor.testing; |
| |
| import androidx.arch.core.executor.ArchTaskExecutor; |
| import androidx.arch.core.executor.TaskExecutor; |
| |
| import org.junit.rules.TestWatcher; |
| import org.junit.runner.Description; |
| |
| /** |
| * A JUnit Test Rule that swaps the background executor used by the Architecture Components with a |
| * different one which executes each task synchronously. |
| * <p> |
| * You can use this rule for your host side tests that use Architecture Components. |
| */ |
| public class InstantTaskExecutorRule extends TestWatcher { |
| @Override |
| protected void starting(Description description) { |
| super.starting(description); |
| ArchTaskExecutor.getInstance().setDelegate(new TaskExecutor() { |
| @Override |
| public void executeOnDiskIO(Runnable runnable) { |
| runnable.run(); |
| } |
| |
| @Override |
| public void postToMainThread(Runnable runnable) { |
| runnable.run(); |
| } |
| |
| @Override |
| public boolean isMainThread() { |
| return true; |
| } |
| }); |
| } |
| |
| @Override |
| protected void finished(Description description) { |
| super.finished(description); |
| ArchTaskExecutor.getInstance().setDelegate(null); |
| } |
| } |