1 /* 2 * Copyright (C) 2023 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.binds; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import dagger.Binds; 22 import dagger.Component; 23 import dagger.Module; 24 import javax.inject.Inject; 25 import javax.inject.Provider; 26 import javax.inject.Singleton; 27 import org.junit.Test; 28 import org.junit.runner.RunWith; 29 import org.junit.runners.JUnit4; 30 31 // This is a regression test for b/267223822 where a scoped @Binds used in a cycle caused problems 32 // in fastInit mode. 33 @RunWith(JUnit4.class) 34 public class RecursiveBindsTest { 35 36 public interface Foo {} 37 38 public static final class FooImpl implements Foo { FooImpl(@uppressWarnings"unused") Provider<Foo> provider)39 @Inject FooImpl(@SuppressWarnings("unused") Provider<Foo> provider) {} 40 } 41 42 @Module 43 public interface FooModule { 44 // This binding must be scoped to create the cycle. Otherwise without a scope, the generated 45 // code just doesn't have a field for this @Binds because we can directly use FooImpl's 46 // provider as they are equivalent. 47 @Binds 48 @Singleton bindFoo(FooImpl impl)49 Foo bindFoo(FooImpl impl); 50 } 51 52 @Component(modules = FooModule.class) 53 @Singleton 54 public interface TestSingletonComponent { 55 // We get the impl here to create a cycle where the impl factory needs to be delegated. 56 // That way the scoped binds (which does something like DoubleCheck.provider(implFactory)) is 57 // the one that would fail if it wasn't delegated properly. getFooImplProvider()58 Provider<FooImpl> getFooImplProvider(); 59 } 60 61 @Test test()62 public void test() { 63 // Technically the NPE would happen when just initializing the component. 64 assertThat(DaggerRecursiveBindsTest_TestSingletonComponent.create().getFooImplProvider().get()) 65 .isNotNull(); 66 } 67 } 68