/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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.commons.configuration2;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  
  import org.apache.commons.configuration2.convert.DefaultListDelimiterHandler;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests the ConfigurationConverter class.
   */
  public class TestConfigurationConverter {
  
      /**
       * Creates a configuration object with some test values.
       *
       * @return the test configuration
       */
      private static BaseConfiguration createTestConfiguration() {
          final BaseConfiguration config = new BaseConfiguration();
          config.addProperty("string", "teststring");
          config.addProperty("array", "item 1");
          config.addProperty("array", "item 2");
          config.addProperty("interpolated", "${string}");
          config.addProperty("interpolated-array", "${interpolated}");
          config.addProperty("interpolated-array", "${interpolated}");
          return config;
      }
  
      @Test
      void testConfigurationToMap() {
          final Configuration config = new BaseConfiguration();
          config.addProperty("string", "teststring");
  
          final Map<Object, Object> map = ConfigurationConverter.getMap(config);
  
          assertNotNull(map);
          assertEquals("teststring", map.get("string"));
      }
  
      /**
       * Tests a conversion to Properties if the default list delimiter handler is used (which does not support list joining).
       */
      @Test
      void testConfigurationToPropertiesDefaultListHandling() {
          final BaseConfiguration config = createTestConfiguration();
          final Properties props = ConfigurationConverter.getProperties(config);
  
          assertNotNull(props);
          assertEquals("teststring", props.getProperty("string"));
          assertEquals("teststring", props.getProperty("interpolated"));
          assertEquals("item 1,item 2", props.getProperty("array"));
          assertEquals("teststring,teststring", props.getProperty("interpolated-array"));
      }
  
      /**
       * Tests a conversion to Properties if the list delimiter handler supports list joining.
       */
      @Test
      void testConfigurationToPropertiesListDelimiterHandler() {
          final BaseConfiguration config = createTestConfiguration();
          config.setListDelimiterHandler(new DefaultListDelimiterHandler(';'));
          final Properties props = ConfigurationConverter.getProperties(config);
          assertEquals("item 1;item 2", props.getProperty("array"));
      }
  
      /**
       * Tests a conversion to Properties if the source configuration does not extend AbstractConfiguration. In this case,
       * properties with multiple values have to be handled in a special way.
       */
      @Test
      void testConfigurationToPropertiesNoAbstractConfiguration() {
          final Configuration src = mock(Configuration.class);
          final BaseConfiguration config = createTestConfiguration();
  
         when(src.getKeys()).thenReturn(config.getKeys());
         when(src.getList(any())).thenAnswer(invocation -> {
             final String key = invocation.getArgument(0, String.class);
             return config.getList(key);
         });
 
         final Properties props = ConfigurationConverter.getProperties(src);
         assertEquals("item 1,item 2", props.getProperty("array"));
     }
 
     /**
      * Tests the conversion of a configuration object to properties if scalar values are involved. This test is related to
      * CONFIGURATION-432.
      */
     @Test
     void testConfigurationToPropertiesScalarValue() {
         final BaseConfiguration config = new BaseConfiguration();
         config.addProperty("scalar", Integer.valueOf(42));
         final Properties props = ConfigurationConverter.getProperties(config);
         assertEquals("42", props.getProperty("scalar"));
     }
 
     @Test
     void testPropertiesToConfiguration() {
         final Properties props = new Properties();
         props.setProperty("string", "teststring");
         props.setProperty("int", "123");
         props.setProperty("list", "item 1, item 2");
 
         final AbstractConfiguration config = (AbstractConfiguration) ConfigurationConverter.getConfiguration(props);
         config.setListDelimiterHandler(new DefaultListDelimiterHandler(','));
 
         assertEquals("teststring", config.getString("string"));
         final List<Object> item1 = config.getList("list");
         assertEquals("item 1", item1.get(0));
 
         assertEquals(123, config.getInt("int"));
     }
 
 }