/*
    *    Copyright 2009-2023 the original author or authors.
    *
    *    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
    *
    *       https://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 org.apache.ibatis.mapping;
  
  import static org.junit.jupiter.api.Assertions.*;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.sql.Connection;
  import java.sql.DatabaseMetaData;
  import java.sql.SQLException;
  import java.util.Properties;
  
  import javax.sql.DataSource;
  
  import org.apache.ibatis.builder.BuilderException;
  import org.junit.jupiter.api.Test;
  
  class VendorDatabaseIdProviderTest {
  
    private static final String PRODUCT_NAME = "Chewbacca DB";
  
    @Test
    void shouldNpeBeThrownIfDataSourceIsNull() {
      VendorDatabaseIdProvider provider = new VendorDatabaseIdProvider();
      try {
        provider.getDatabaseId(null);
        fail("Should NullPointerException be thrown.");
      } catch (NullPointerException e) {
        // pass
      }
    }
  
    @Test
    void shouldProductNameBeReturnedIfPropertiesIsNull() throws Exception {
      VendorDatabaseIdProvider provider = new VendorDatabaseIdProvider();
      assertEquals(PRODUCT_NAME, provider.getDatabaseId(mockDataSource()));
    }
  
    @Test
    void shouldProductNameBeTranslated() throws Exception {
      VendorDatabaseIdProvider provider = new VendorDatabaseIdProvider();
      Properties properties = new Properties();
      String partialProductName = "Chewbacca";
      String id = "chewie";
      properties.put(partialProductName, id);
      provider.setProperties(properties);
      assertEquals(id, provider.getDatabaseId(mockDataSource()));
    }
  
    @Test
    void shouldNullBeReturnedIfNoMatch() throws Exception {
      VendorDatabaseIdProvider provider = new VendorDatabaseIdProvider();
      Properties properties = new Properties();
      properties.put("Ewok DB", "ewok");
      provider.setProperties(properties);
      assertNull(provider.getDatabaseId(mockDataSource()));
    }
  
    @Test
    void shouldNullBeReturnedOnDbError() throws Exception {
      DataSource dataSource = mock(DataSource.class);
      when(dataSource.getConnection()).thenThrow(SQLException.class);
  
      VendorDatabaseIdProvider provider = new VendorDatabaseIdProvider();
      Properties properties = new Properties();
      properties.put("Ewok DB", "ewok");
      try {
        provider.getDatabaseId(dataSource);
        fail("Should BuilderException be thrown.");
      } catch (BuilderException e) {
        // pass
      }
    }
  
    private DataSource mockDataSource() throws SQLException {
      DatabaseMetaData metaData = mock(DatabaseMetaData.class);
      when(metaData.getDatabaseProductName()).thenReturn(PRODUCT_NAME);
      Connection connection = mock(Connection.class);
      when(connection.getMetaData()).thenReturn(metaData);
      DataSource dataSource = mock(DataSource.class);
      when(dataSource.getConnection()).thenReturn(connection);
      return dataSource;
    }
  
 }