package org.codehaus.plexus.interpolation;
   
   /*
    * Copyright 2001-2008 Codehaus Foundation.
    *
    * 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.
   */
  
  import java.util.Properties;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class PrefixedValueSourceWrapperTest {
  
      @Test
      public void testShouldReturnValueForPropertyVSWRappedWithSinglePrefix() {
          String prefix = "prefix.";
          String key = "key";
          String value = "value";
  
          Properties props = new Properties();
          props.setProperty(key, value);
  
          PrefixedValueSourceWrapper wrapper =
                  new PrefixedValueSourceWrapper(new PropertiesBasedValueSource(props), prefix);
  
          assertEquals(value, wrapper.getValue(prefix + key));
      }
  
      @Test
      public void testShouldReturnNullForIncorrectPrefixUsingPropertyVSWRappedWithSinglePrefix() {
          String prefix = "prefix.";
          String otherPrefix = "other.";
          String key = "key";
          String value = "value";
  
          Properties props = new Properties();
          props.setProperty(key, value);
  
          PrefixedValueSourceWrapper wrapper =
                  new PrefixedValueSourceWrapper(new PropertiesBasedValueSource(props), prefix);
  
          assertNull(wrapper.getValue(otherPrefix + key));
      }
  
      @Test
      public void testShouldNullForMissingValueInPropertyVSWRappedWithSinglePrefix() {
          String prefix = "prefix.";
          String key = "key";
  
          Properties props = new Properties();
  
          PrefixedValueSourceWrapper wrapper =
                  new PrefixedValueSourceWrapper(new PropertiesBasedValueSource(props), prefix);
  
          assertNull(wrapper.getValue(prefix + key));
      }
  }