content: /*
   * Copyright 1999-2023 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.persistence.datasource;
  
  import com.alibaba.nacos.persistence.configuration.DatasourceConfiguration;
  import com.alibaba.nacos.sys.env.EnvUtil;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.InjectMocks;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.springframework.mock.env.MockEnvironment;
  import org.springframework.test.util.ReflectionTestUtils;
  
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  @ExtendWith(MockitoExtension.class)
  class DynamicDataSourceTest {
      
      @InjectMocks
      private DynamicDataSource dataSource;
      
      @Mock
      private LocalDataSourceServiceImpl localDataSourceService;
      
      @Mock
      private ExternalDataSourceServiceImpl basicDataSourceService;
      
      @BeforeEach
      void setUp() {
          EnvUtil.setEnvironment(new MockEnvironment());
          dataSource = DynamicDataSource.getInstance();
      }
      
      @AfterEach
      void tearDown() {
          DatasourceConfiguration.setEmbeddedStorage(true);
          DatasourceConfiguration.setUseExternalDb(false);
          ReflectionTestUtils.setField(dataSource, "localDataSourceService", null);
          ReflectionTestUtils.setField(dataSource, "basicDataSourceService", null);
          EnvUtil.setEnvironment(null);
      }
      
      @Test
      void testGetDataSourceWithAlreadyInitialized() {
          ReflectionTestUtils.setField(dataSource, "localDataSourceService", localDataSourceService);
          ReflectionTestUtils.setField(dataSource, "basicDataSourceService", basicDataSourceService);
          DatasourceConfiguration.setEmbeddedStorage(true);
          assertInstanceOf(LocalDataSourceServiceImpl.class, dataSource.getDataSource());
          
          DatasourceConfiguration.setEmbeddedStorage(false);
          assertInstanceOf(ExternalDataSourceServiceImpl.class, dataSource.getDataSource());
      }
      
      @Test
      void testInitWithEmbeddedStorage() {
          DatasourceConfiguration.setEmbeddedStorage(true);
          assertInstanceOf(LocalDataSourceServiceImpl.class, dataSource.getDataSource());
      }
      
      @Test
      void testInitWithExternalStorage() {
          DatasourceConfiguration.setEmbeddedStorage(false);
          assertInstanceOf(ExternalDataSourceServiceImpl.class, dataSource.getDataSource());
      }
      
      @Test
      void testInitWithException() {
          EnvUtil.setEnvironment(null);
          assertThrows(RuntimeException.class, () -> dataSource.getDataSource());
      }
  }
  