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 example.hilt; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import android.content.Context; 22 import android.os.Build; 23 import androidx.test.core.app.ApplicationProvider; 24 import androidx.test.ext.junit.runners.AndroidJUnit4; 25 import dagger.hilt.android.testing.BindValue; 26 import dagger.hilt.android.testing.HiltAndroidRule; 27 import dagger.hilt.android.testing.HiltAndroidTest; 28 import dagger.hilt.android.testing.HiltTestApplication; 29 import example.common.CoffeeLogger; 30 import example.common.CoffeeMaker; 31 import example.common.Heater; 32 import javax.inject.Inject; 33 import org.junit.Rule; 34 import org.junit.Test; 35 import org.junit.runner.RunWith; 36 import org.robolectric.annotation.Config; 37 38 /** Tests using a fake heater. */ 39 @HiltAndroidTest 40 @Config(sdk = {Build.VERSION_CODES.P}, application = HiltTestApplication.class) 41 @RunWith(AndroidJUnit4.class) 42 public final class CoffeeAppFakeHeaterTest { 43 public @Rule HiltAndroidRule rule = new HiltAndroidRule(this); 44 45 final class FakeHeater implements Heater { 46 private boolean heating; 47 48 @Override on()49 public void on() { 50 this.heating = true; 51 logger.log("~ ~ ~ fake heating ~ ~ ~"); 52 } 53 54 @Override off()55 public void off() { 56 this.heating = false; 57 } 58 59 @Override isHot()60 public boolean isHot() { 61 return heating; 62 } 63 } 64 65 @Inject CoffeeMaker maker; 66 @Inject CoffeeLogger logger; 67 68 @BindValue Heater fakeHeater = new FakeHeater(); 69 70 @Test testApplicationClass()71 public void testApplicationClass() throws Exception { 72 assertThat((Context) ApplicationProvider.getApplicationContext()) 73 .isInstanceOf(HiltTestApplication.class); 74 } 75 76 @Test testLogs()77 public void testLogs() throws Exception { 78 rule.inject(); 79 assertThat(logger.logs()).isEmpty(); 80 maker.brew(); 81 assertThat(logger.logs()) 82 .containsExactly( 83 "~ ~ ~ fake heating ~ ~ ~", 84 "=> => pumping => =>", 85 " [_]P coffee! [_]P ") 86 .inOrder(); 87 } 88 } 89