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.junit.Assert.assertNull;
  
  import androidx.test.core.app.ApplicationProvider;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /**
   * Integration tests for {@link LocalUserDataSource}.
   */
  @RunWith(AndroidJUnit4.class)
  public class LocalUserDataSourceTest {
  
      private LocalUserDataSource mDataSource;
  
      private static final User USER = new User(1, "username");
  
      @Before
      public void initDb() throws Exception {
          mDataSource = LocalUserDataSource.getInstance(ApplicationProvider.getApplicationContext());
      }
  
      @After
      public void cleanUp() {
          mDataSource.deleteAllUsers();
      }
  
      @Test
      public void insertAndGetUser() {
          // When inserting a new user in the data source
          mDataSource.insertOrUpdateUser(USER);
  
          //The user can be retrieved
          User dbUser = mDataSource.getUser();
          assertEquals(dbUser.getId(), USER.getId());
          assertEquals(dbUser.getUserName(), USER.getUserName());
      }
  
      @Test
      public void updateAndGetUser() {
          // Given that we have a user in the data source
          mDataSource.insertOrUpdateUser(USER);
  
          // When we are updating the name of the user
          User updatedUser = new User(USER.getId(), "new username");
          mDataSource.insertOrUpdateUser(updatedUser);
  
          //The retrieved user has the updated username
          User dbUser = mDataSource.getUser();
          assertEquals(dbUser.getId(), USER.getId());
          assertEquals(dbUser.getUserName(), "new username");
      }
  
      @Test
      public void deleteAndGetUser() {
          // Given that we have a user in the data source
          mDataSource.insertOrUpdateUser(USER);
  
          //When we are deleting all users
          mDataSource.deleteAllUsers();
  
          // The user is no longer in the data source
          User dbUser = mDataSource.getUser();
          assertNull(dbUser);
      }
  }