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.kotlinsrc.binds 18 19 import com.google.common.truth.Truth.assertThat 20 import dagger.Binds 21 import dagger.Component 22 import dagger.Module 23 import javax.inject.Inject 24 import javax.inject.Provider 25 import javax.inject.Singleton 26 import org.junit.Test 27 import org.junit.runner.RunWith 28 import org.junit.runners.JUnit4 29 30 // This is a regression test for b/267223822 where a scoped @Binds used in a cycle caused problems 31 // in fastInit mode. 32 @RunWith(JUnit4::class) 33 class RecursiveBindsTest { 34 35 interface Foo {} 36 37 class FooImpl internal @Inject constructor(@SuppressWarnings("unused") provider: Provider<Foo>) : 38 Foo {} 39 40 @Module 41 interface FooModule { 42 // This binding must be scoped to create the cycle. Otherwise without a scope, the generated 43 // code just doesn't have a field for this @Binds because we can directly use FooImpl's 44 // provider as they are equivalent. bindFoonull45 @Binds @Singleton fun bindFoo(impl: FooImpl): Foo 46 } 47 48 @Component(modules = FooModule::class) 49 @Singleton 50 interface TestSingletonComponent { 51 // We get the impl here to create a cycle where the impl factory needs to be delegated. 52 // That way the scoped binds (which does something like DoubleCheck.provider(implFactory)) is 53 // the one that would fail if it wasn't delegated properly. 54 fun getFooImplProvider(): Provider<FooImpl> 55 } 56 57 @Test testnull58 fun test() { 59 // Technically the NPE would happen when just initializing the component. 60 assertThat(DaggerRecursiveBindsTest_TestSingletonComponent.create().getFooImplProvider().get()) 61 .isNotNull() 62 } 63 } 64