1 /* 2 * Copyright (C) 2017 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.functional.builder; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import dagger.Component; 22 import org.junit.Test; 23 import org.junit.runner.RunWith; 24 import org.junit.runners.JUnit4; 25 26 @RunWith(JUnit4.class) 27 public class BuildMethodCovariantReturnInheritedTest { 28 @Component 29 interface Simple { 30 interface BuilderSupertype { build()31 Object build(); 32 } 33 34 @Component.Builder 35 interface Builder extends BuilderSupertype {} 36 } 37 38 interface ComponentSupertype {} 39 40 @Component 41 interface GenericBuilderType extends ComponentSupertype { 42 interface GenericBuilderSupertype<T> { build()43 T build(); 44 } 45 46 @Component.Builder 47 interface Builder extends GenericBuilderSupertype<ComponentSupertype> {} 48 } 49 50 interface ParameterizedComponentSupertype<T> {} 51 52 @Component 53 interface GenericComponentSupertypeAndBuilderSupertype 54 extends ParameterizedComponentSupertype<Object> { 55 56 interface GenericBuilderSupertype<T> { build()57 ParameterizedComponentSupertype<T> build(); 58 } 59 60 @Component.Builder 61 interface Builder extends GenericBuilderSupertype<Object> {} 62 } 63 64 @Test simpleComponentTest()65 public void simpleComponentTest() { 66 Object component = DaggerBuildMethodCovariantReturnInheritedTest_Simple.builder().build(); 67 assertThat(component).isInstanceOf(Simple.class); 68 } 69 70 @Test genericBuilderTypeTest()71 public void genericBuilderTypeTest() { 72 ComponentSupertype component = 73 DaggerBuildMethodCovariantReturnInheritedTest_GenericBuilderType.builder().build(); 74 assertThat(component).isInstanceOf(GenericBuilderType.class); 75 } 76 77 @Test genericComponentSupertypeAndBuilderSupertypeTest()78 public void genericComponentSupertypeAndBuilderSupertypeTest() { 79 ParameterizedComponentSupertype<Object> component = 80 DaggerBuildMethodCovariantReturnInheritedTest_GenericComponentSupertypeAndBuilderSupertype 81 .builder() 82 .build(); 83 assertThat(component).isInstanceOf(GenericComponentSupertypeAndBuilderSupertype.class); 84 } 85 } 86