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LocalUserDataSourceTest.java
/* * 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 android.support.test.InstrumentationRegistry; import android.support.test.runner.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(InstrumentationRegistry.getTargetContext()); } @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); } }