1 /* 2 * Copyright (C) 2020 The Dagger Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dagger.hilt.android.testing; 18 19 import androidx.multidex.MultiDexApplication; 20 import dagger.hilt.android.internal.testing.TestApplicationComponentManager; 21 import dagger.hilt.android.internal.testing.TestApplicationComponentManagerHolder; 22 import dagger.hilt.internal.GeneratedComponentManager; 23 24 /** 25 * An application that can be used for Android instrumentation or Robolectric tests using Hilt. 26 */ 27 public final class HiltTestApplication extends MultiDexApplication 28 implements GeneratedComponentManager<Object>, TestApplicationComponentManagerHolder { 29 30 // This field is initialized lazily to avoid pulling the generated component into the main dex. We 31 // could possibly avoid this by class loading TestComponentDataSupplier lazily rather than in the 32 // TestApplicationComponentManager constructor. 33 private volatile TestApplicationComponentManager componentManager; 34 private final Object componentManagerLock = new Object(); 35 36 @Override componentManager()37 public final GeneratedComponentManager<Object> componentManager() { 38 if (componentManager == null) { 39 synchronized (componentManagerLock) { 40 if (componentManager == null) { 41 componentManager = new TestApplicationComponentManager(this); 42 } 43 } 44 } 45 return componentManager; 46 } 47 48 @Override generatedComponent()49 public final Object generatedComponent() { 50 return componentManager().generatedComponent(); 51 } 52 } 53