content: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * 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.example.android.persistence.migrations;
  
  import static org.junit.Assert.assertEquals;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  
  import org.junit.Before;
  import org.junit.Test;
  import org.mockito.ArgumentCaptor;
  import org.mockito.Captor;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  
  /**
   * Unit tests for the UserRepository.
   */
  public class UserRepositoryTest {
  
      @Mock
      private UserDataSource mUserDataSource;
  
      private UserRepository mUserRepository;
  
      private static final User USER = new User("username");
  
      @Captor
      private ArgumentCaptor<User> mUserArgumentCaptor;
  
      @Before
      public void setUp() {
          MockitoAnnotations.initMocks(this);
  
          mUserRepository = new UserRepository(new SingleExecutors(), mUserDataSource);
      }
  
      @Test
      public void getUserWithUserInDataSource() {
          //Given a callback for loading the user
          LoadUserCallback callback = mock(LoadUserCallback.class);
          // And user in the data source
          when(mUserDataSource.getUser()).thenReturn(USER);
  
          // When requesting a user from the repository
          mUserRepository.getUser(callback);
  
          // The user is requested from the user data source
          verify(mUserDataSource).getUser();
          // and the callback triggers correct method
          verify(callback).onUserLoaded(USER);
      }
  
      @Test
      public void getUserWithNoUserInDataSource() {
          //Given a callback for loading the user
          LoadUserCallback callback = mock(LoadUserCallback.class);
          // And no user in the data source
          when(mUserDataSource.getUser()).thenReturn(null);
  
          // When requesting a user from the repository
          mUserRepository.getUser(callback);
  
          // The user is requested from the user data source
          verify(mUserDataSource).getUser();
          // and the callback triggers correct method
          verify(callback).onDataNotAvailable();
      }
  
      @Test
      public void updateUserName() {
          // Given a callback for updating the username
          UpdateUserCallback callback = mock(UpdateUserCallback.class);
  
          // When updating the username
          mUserRepository.updateUserName("name", callback);
  
          // The user with the correct user name was saved
          verify(mUserDataSource).insertOrUpdateUser(mUserArgumentCaptor.capture());
          User user = mUserArgumentCaptor.getValue();
          assertEquals("name", user.getUserName());
          // The callback is triggered
          verify(callback).onUserUpdated(user);
      }
  
  }