| /** |
| * Copyright (C) 2006 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.inject; |
| |
| import com.google.inject.name.Named; |
| import com.google.inject.name.Names; |
| import junit.framework.TestCase; |
| |
| /** |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| public class ImplicitBindingTest extends TestCase { |
| |
| public void testCircularDependency() throws CreationException { |
| Injector injector = Guice.createInjector(); |
| Foo foo = injector.getInstance(Foo.class); |
| assertSame(foo, foo.bar.foo); |
| } |
| |
| static class Foo { |
| @Inject Bar bar; |
| } |
| |
| static class Bar { |
| final Foo foo; |
| @Inject |
| public Bar(Foo foo) { |
| this.foo = foo; |
| } |
| } |
| |
| public void testDefaultImplementation() { |
| Injector injector = Guice.createInjector(); |
| I i = injector.getInstance(I.class); |
| i.go(); |
| } |
| |
| @ImplementedBy(IImpl.class) |
| interface I { |
| void go(); |
| } |
| |
| static class IImpl implements I { |
| public void go() {} |
| } |
| |
| static class AlternateImpl implements I { |
| public void go() {} |
| } |
| |
| public void testDefaultProvider() { |
| Injector injector = Guice.createInjector(); |
| Provided provided = injector.getInstance(Provided.class); |
| provided.go(); |
| } |
| |
| public void testBindingOverridesImplementedBy() { |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(I.class).to(AlternateImpl.class); |
| } |
| }); |
| assertEquals(AlternateImpl.class, injector.getInstance(I.class).getClass()); |
| } |
| |
| @ProvidedBy(ProvidedProvider.class) |
| interface Provided { |
| void go(); |
| } |
| |
| public void testNoImplicitBindingIsCreatedForAnnotatedKeys() { |
| try { |
| Guice.createInjector().getInstance(Key.get(I.class, Names.named("i"))); |
| fail(); |
| } catch (ProvisionException expected) { |
| Asserts.assertContains(expected.getMessage(), |
| "1) Error at " + I.class.getName() + ".class(ImplicitBindingTest.java:", |
| "No implementation for " + I.class.getName(), |
| "annotated with @" + Named.class.getName() + "(value=i) was bound."); |
| } |
| |
| } |
| |
| static class ProvidedProvider implements Provider<Provided> { |
| public Provided get() { |
| return new Provided() { |
| public void go() {} |
| }; |
| } |
| } |
| |
| } |