scopestest.java

Guice是轻量级的依赖注入框架。简而言之

/**
 * 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 [e-mail] (Bob Lee)
 */
public class ScopesTest extends TestCase {

  public void testSingletonAnnotation() throws CreationException {
    BinderImpl binder = new BinderImpl();
    BindingBuilderImpl<SampleSingleton> bindingBuilder
        = binder.bind(SampleSingleton.class);
    binder.createInjector();
  }

  @Singleton
  static class SampleSingleton {}

  Scope scope = new Scope() {
    public <T> Provider<T> scope(Key<T> key, Provider<T> unscoped) {
      return unscoped;
    }
  };

  public void testOverriddingAnnotation()
      throws CreationException {
    BinderImpl builder = new BinderImpl();
    BindingBuilderImpl<SampleSingleton> bindingBuilder
        = builder.bind(SampleSingleton.class);
    bindingBuilder.in(scope);
    builder.createInjector();
    assertSame(scope, bindingBuilder.scope);
  }
}