test/com/google/inject/BindingOrderTest.java

/**
 * 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 junit.framework.TestCase;

/**
 * @author jessewilson@google.com (Jesse Wilson)
 */
public class BindingOrderTest extends TestCase {

  public void testBindingOutOfOrder() {
    Guice.createInjector(new AbstractModule() {
      protected void configure() {
        bind(BoundFirst.class);
        bind(BoundSecond.class).to(BoundSecondImpl.class);
      }
    });
  }

  public static class BoundFirst {
    @Inject public BoundFirst(BoundSecond boundSecond) { }
  }

  interface BoundSecond { }
  static class BoundSecondImpl implements BoundSecond { }

  public void testBindingOrderAndScopes() {
    Injector injector = Guice.createInjector(new AbstractModule() {
      protected void configure() {
        bind(A.class);
        bind(B.class).asEagerSingleton();
      }
    });

    // For untargetted bindings with scopes, sometimes we lose the scope at
    // injector time. This is because we use the injector's just-in-time
    // bindings to build these, rather than the bind command. This is a known
    // bug.
    assertSame("known bug: untargetted binding out-of-order",
        injector.getInstance(A.class).b, injector.getInstance(A.class).b);
  }

  static class A {
    @Inject B b;
  }

  static class B { }
}