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/**
* 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;
}
}
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