| /* |
| * Copyright (C) 2007 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 static com.google.inject.Asserts.assertContains; |
| import com.google.inject.internal.ImmutableSet; |
| import com.google.inject.internal.Sets; |
| import com.google.inject.matcher.Matchers; |
| import static com.google.inject.name.Names.named; |
| import com.google.inject.spi.TypeEncounter; |
| import com.google.inject.spi.TypeListener; |
| import java.lang.reflect.Constructor; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import junit.framework.TestCase; |
| import org.aopalliance.intercept.MethodInterceptor; |
| import org.aopalliance.intercept.MethodInvocation; |
| |
| /** |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| public class BindingTest extends TestCase { |
| |
| static class Dependent { |
| @Inject A a; |
| @Inject Dependent(A a, B b) {} |
| @Inject void injectBob(Bob bob) {} |
| } |
| |
| public void testExplicitCyclicDependency() { |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(A.class); |
| bind(B.class); |
| } |
| }).getInstance(A.class); |
| } |
| |
| static class A { @Inject B b; } |
| static class B { @Inject A a; } |
| |
| static class Bob {} |
| |
| static class MyModule extends AbstractModule { |
| |
| protected void configure() { |
| // Linked. |
| bind(Object.class).to(Runnable.class).in(Scopes.SINGLETON); |
| |
| // Instance. |
| bind(Runnable.class).toInstance(new Runnable() { |
| public void run() {} |
| }); |
| |
| // Provider instance. |
| bind(Foo.class).toProvider(new Provider<Foo>() { |
| public Foo get() { |
| return new Foo(); |
| } |
| }).in(Scopes.SINGLETON); |
| |
| // Provider. |
| bind(Foo.class) |
| .annotatedWith(named("provider")) |
| .toProvider(FooProvider.class); |
| |
| // Class. |
| bind(Bar.class).in(Scopes.SINGLETON); |
| |
| // Constant. |
| bindConstant().annotatedWith(named("name")).to("Bob"); |
| } |
| } |
| |
| static class Foo {} |
| |
| public static class FooProvider implements Provider<Foo> { |
| public Foo get() { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| public static class Bar {} |
| |
| public void testBindToUnboundLinkedBinding() { |
| try { |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(Collection.class).to(List.class); |
| } |
| }); |
| fail(); |
| } catch (CreationException expected) { |
| assertContains(expected.getMessage(), "No implementation for java.util.List was bound."); |
| } |
| } |
| |
| /** |
| * This test ensures that the asEagerSingleton() scoping applies to the key, |
| * not to what the key is linked to. |
| */ |
| public void testScopeIsAppliedToKeyNotTarget() { |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(Integer.class).toProvider(Counter.class).asEagerSingleton(); |
| bind(Number.class).toProvider(Counter.class).asEagerSingleton(); |
| } |
| }); |
| |
| assertNotSame(injector.getInstance(Integer.class), injector.getInstance(Number.class)); |
| } |
| |
| static class Counter implements Provider<Integer> { |
| static AtomicInteger next = new AtomicInteger(1); |
| public Integer get() { |
| return next.getAndIncrement(); |
| } |
| } |
| |
| public void testAnnotatedNoArgConstructor() { |
| assertBindingSucceeds(PublicNoArgAnnotated.class); |
| assertBindingSucceeds(ProtectedNoArgAnnotated.class); |
| assertBindingSucceeds(PackagePrivateNoArgAnnotated.class); |
| assertBindingSucceeds(PrivateNoArgAnnotated.class); |
| } |
| |
| static class PublicNoArgAnnotated { |
| @Inject public PublicNoArgAnnotated() { } |
| } |
| |
| static class ProtectedNoArgAnnotated { |
| @Inject protected ProtectedNoArgAnnotated() { } |
| } |
| |
| static class PackagePrivateNoArgAnnotated { |
| @Inject PackagePrivateNoArgAnnotated() { } |
| } |
| |
| static class PrivateNoArgAnnotated { |
| @Inject private PrivateNoArgAnnotated() { } |
| } |
| |
| public void testUnannotatedNoArgConstructor() throws Exception{ |
| assertBindingSucceeds(PublicNoArg.class); |
| assertBindingSucceeds(ProtectedNoArg.class); |
| assertBindingSucceeds(PackagePrivateNoArg.class); |
| assertBindingSucceeds(PrivateNoArgInPrivateClass.class); |
| assertBindingFails(PrivateNoArg.class); |
| } |
| |
| static class PublicNoArg { |
| public PublicNoArg() { } |
| } |
| |
| static class ProtectedNoArg { |
| protected ProtectedNoArg() { } |
| } |
| |
| static class PackagePrivateNoArg { |
| PackagePrivateNoArg() { } |
| } |
| |
| private static class PrivateNoArgInPrivateClass { |
| PrivateNoArgInPrivateClass() { } |
| } |
| |
| static class PrivateNoArg { |
| private PrivateNoArg() { } |
| } |
| |
| private void assertBindingSucceeds(final Class<?> clazz) { |
| assertNotNull(Guice.createInjector().getInstance(clazz)); |
| } |
| |
| private void assertBindingFails(final Class<?> clazz) throws NoSuchMethodException { |
| try { |
| Guice.createInjector().getInstance(clazz); |
| fail(); |
| } catch (ConfigurationException expected) { |
| assertContains(expected.getMessage(), |
| "Could not find a suitable constructor in " + PrivateNoArg.class.getName(), |
| "at " + PrivateNoArg.class.getName() + ".class(BindingTest.java:"); |
| } |
| } |
| |
| public void testTooManyConstructors() { |
| try { |
| Guice.createInjector().getInstance(TooManyConstructors.class); |
| fail(); |
| } catch (ConfigurationException expected) { |
| assertContains(expected.getMessage(), |
| TooManyConstructors.class.getName() + " has more than one constructor annotated with " |
| + "@Inject. Classes must have either one (and only one) constructor", |
| "at " + TooManyConstructors.class.getName() + ".class(BindingTest.java:"); |
| } |
| } |
| |
| static class TooManyConstructors { |
| @Inject TooManyConstructors(Injector i) {} |
| @Inject TooManyConstructors() {} |
| } |
| |
| public void testToConstructorBindings() throws NoSuchMethodException { |
| final Constructor constructor = C.class.getConstructor(Stage.class, Object.class); |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(new TypeLiteral<C<Stage>>() {}).toConstructor(constructor); |
| bind(new TypeLiteral<C<Injector>>() {}).toConstructor(constructor); |
| } |
| }); |
| |
| C<Stage> one = injector.getInstance(new Key<C<Stage>>() {}); |
| assertEquals(Stage.DEVELOPMENT, one.stage); |
| assertEquals(Stage.DEVELOPMENT, one.t); |
| assertEquals(Stage.DEVELOPMENT, one.anotherT); |
| |
| C<Injector> two = injector.getInstance(new Key<C<Injector>>() {}); |
| assertEquals(Stage.DEVELOPMENT, two.stage); |
| assertEquals(injector, two.t); |
| assertEquals(injector, two.anotherT); |
| } |
| |
| public void testToConstructorBinding() throws NoSuchMethodException { |
| final Constructor<D> constructor = D.class.getConstructor(Stage.class); |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(Object.class).toConstructor(constructor); |
| } |
| }); |
| |
| D d = (D) injector.getInstance(Object.class); |
| assertEquals(Stage.DEVELOPMENT, d.stage); |
| } |
| |
| public void testToConstructorAndMethodInterceptors() throws NoSuchMethodException { |
| final Constructor<D> constructor = D.class.getConstructor(Stage.class); |
| final AtomicInteger count = new AtomicInteger(); |
| final MethodInterceptor countingInterceptor = new MethodInterceptor() { |
| public Object invoke(MethodInvocation methodInvocation) throws Throwable { |
| count.incrementAndGet(); |
| return methodInvocation.proceed(); |
| } |
| }; |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(Object.class).toConstructor(constructor); |
| bindInterceptor(Matchers.any(), Matchers.any(), countingInterceptor); |
| } |
| }); |
| |
| D d = (D) injector.getInstance(Object.class); |
| d.hashCode(); |
| d.hashCode(); |
| assertEquals(2, count.get()); |
| } |
| |
| public void testInaccessibleConstructor() throws NoSuchMethodException { |
| final Constructor<E> constructor = E.class.getDeclaredConstructor(Stage.class); |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(E.class).toConstructor(constructor); |
| } |
| }); |
| |
| E e = injector.getInstance(E.class); |
| assertEquals(Stage.DEVELOPMENT, e.stage); |
| } |
| |
| public void testToConstructorAndScopes() throws NoSuchMethodException { |
| final Constructor<F> constructor = F.class.getConstructor(Stage.class); |
| |
| final Key<Object> d = Key.get(Object.class, named("D")); // default scoping |
| final Key<Object> s = Key.get(Object.class, named("S")); // singleton |
| final Key<Object> n = Key.get(Object.class, named("N")); // "N" instances |
| final Key<Object> r = Key.get(Object.class, named("R")); // a regular binding |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(d).toConstructor(constructor); |
| bind(s).toConstructor(constructor).in(Singleton.class); |
| bind(n).toConstructor(constructor).in(Scopes.NO_SCOPE); |
| bind(r).to(F.class); |
| } |
| }); |
| |
| assertDistinct(injector, 1, d, d, d, d); |
| assertDistinct(injector, 1, s, s, s, s); |
| assertDistinct(injector, 4, n, n, n, n); |
| assertDistinct(injector, 1, r, r, r, r); |
| assertDistinct(injector, 4, d, d, r, r, s, s, n); |
| } |
| |
| public void assertDistinct(Injector injector, int expectedCount, Key<?>... keys) { |
| ImmutableSet.Builder<Object> builder = ImmutableSet.builder(); |
| for (Key<?> k : keys) { |
| builder.add(injector.getInstance(k)); |
| } |
| assertEquals(expectedCount, builder.build().size()); |
| } |
| |
| public void testToConstructorSpiData() throws NoSuchMethodException { |
| final Set<TypeLiteral<?>> heardTypes = Sets.newHashSet(); |
| |
| final Constructor<D> constructor = D.class.getConstructor(Stage.class); |
| final TypeListener listener = new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| if (!heardTypes.add(type)) { |
| fail("Heard " + type + " multiple times!"); |
| } |
| } |
| }; |
| |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(Object.class).toConstructor(constructor); |
| bind(D.class).toConstructor(constructor); |
| bindListener(Matchers.any(), listener); |
| } |
| }); |
| |
| assertEquals(ImmutableSet.of(TypeLiteral.get(Stage.class), TypeLiteral.get(D.class)), |
| heardTypes); |
| } |
| |
| public static class C<T> { |
| private Stage stage; |
| private T t; |
| @Inject T anotherT; |
| |
| public C(Stage stage, T t) { |
| this.stage = stage; |
| this.t = t; |
| } |
| |
| @Inject C() {} |
| } |
| |
| public static class D { |
| Stage stage; |
| public D(Stage stage) { |
| this.stage = stage; |
| } |
| } |
| |
| private static class E { |
| Stage stage; |
| private E(Stage stage) { |
| this.stage = stage; |
| } |
| } |
| |
| @Singleton |
| public static class F { |
| Stage stage; |
| @Inject public F(Stage stage) { |
| this.stage = stage; |
| } |
| } |
| } |