TestingServiceModuleTest.java

/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * 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.acai;

import static com.google.common.truth.Truth.assertThat;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Key;
import java.util.Set;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public class TestingServiceModuleTest {

  @Test
  public void servicesAreBound() {
    final ServiceToBindByInstance serviceInstance = new ServiceToBindByInstance();
    Injector injector =
        Guice.createInjector(
            new TestingServiceModule() {
              @Override
              protected void configureTestingServices() {
                bindTestingService(ServiceToBindByClass.class);
                bindTestingService(serviceInstance);
              }
            });

    Set<TestingService> boundServices =
        injector.getInstance(new Key<Set<TestingService>>(AcaiInternal.class) {});

    assertThat(boundServices).containsExactly(serviceInstance, new ServiceToBindByClass());
  }

  private static class ServiceToBindByClass implements TestingService {
    @Override
    public boolean equals(Object obj) {
      return obj.getClass() == ServiceToBindByClass.class;
    }
  }

  private static class ServiceToBindByInstance implements TestingService {
    @Override
    public boolean equals(Object obj) {
      return obj == this;
    }
  }
}