| /** |
| * Copyright (C) 2008 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.util.Types; |
| import static com.google.inject.util.Types.listOf; |
| import java.util.List; |
| import junit.framework.TestCase; |
| |
| /** |
| * Demonstrates type reification. |
| * |
| * @author jessewilson@google.com (Jesse Wilson) |
| */ |
| public class TypeLiteralInjectionTest extends TestCase { |
| |
| public void testBindingToRawTypeLiteralIsNotAllowed() { |
| try { |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(TypeLiteral.class).toInstance(TypeLiteral.get(String.class)); |
| } |
| }); |
| fail(); |
| } catch (CreationException expected) { |
| assertContains(expected.getMessage(), |
| "Binding to core guice framework type is not allowed: TypeLiteral"); |
| } |
| } |
| |
| public void testBindingToParameterizedTypeLiteralIsNotAllowed() { |
| try { |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(new TypeLiteral<TypeLiteral<String>>() {}) |
| .toInstance(TypeLiteral.get(String.class)); |
| } |
| }); |
| fail(); |
| } catch (CreationException expected) { |
| assertContains(expected.getMessage(), |
| "Binding to core guice framework type is not allowed: TypeLiteral"); |
| } |
| } |
| |
| public void testInjectTypeLiteralWithRawTypes() { |
| C c = Guice.createInjector().getInstance(C.class); |
| assertEquals(TypeLiteral.get(String.class), c.string); |
| assertEquals(TypeLiteral.get(A.class), c.a); |
| |
| try { |
| Guice.createInjector().getInstance(B.class); |
| fail(); |
| } catch (ConfigurationException expected) { |
| assertContains(expected.getMessage(), TypeLiteral.class.getName() + "<java.util.List<T>> " |
| + "cannot be used as a key; It is not fully specified."); |
| } |
| } |
| |
| public void testInjectTypeLiteralWithClassTypes() { |
| B<Integer> b = Guice.createInjector().getInstance(new Key<B<Integer>>() {}); |
| assertEquals(TypeLiteral.get(String.class), b.string); |
| assertEquals(TypeLiteral.get(Integer.class), b.t); |
| assertEquals(TypeLiteral.get(listOf(Integer.class)), b.listOfT); |
| assertEquals(TypeLiteral.get(listOf(Types.subtypeOf(Integer.class))), b.listOfWildcardT); |
| } |
| |
| public void testInjectRawTypeLiteral() { |
| try { |
| Guice.createInjector().getInstance(TypeLiteral.class); |
| fail(); |
| } catch (ConfigurationException expected) { |
| assertContains(expected.getMessage(), |
| "Cannot inject a TypeLiteral that has no type parameter"); |
| } |
| } |
| |
| static class A<T> { |
| @Inject TypeLiteral<String> string; |
| @Inject TypeLiteral<List<T>> listOfT; |
| @Inject TypeLiteral<List<? extends T>> listOfWildcardT; |
| } |
| |
| static class B<T> extends A<T> { |
| @Inject TypeLiteral<T> t; |
| } |
| |
| static class C<T> { |
| @Inject TypeLiteral<String> string; |
| @Inject TypeLiteral<A> a; |
| T t; |
| } |
| } |