package org.apache.maven.surefire.util.internal;
   
   /*
    * 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
   *
   *     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 org.apache.maven.surefire.util.internal.ImmutableMap.Node;
  import org.junit.Before;
  import org.junit.Test;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Set;
  
  import static org.hamcrest.Matchers.hasItem;
  import static org.hamcrest.Matchers.hasSize;
  import static org.hamcrest.Matchers.is;
  import static org.junit.Assert.assertThat;
  
  /**
   * @since 2.20
   */
  public class ImmutableMapTest
  {
      private ImmutableMap<String, String> map;
  
      @Before
      public void setUp() throws Exception
      {
          Map<String, String> backingMap = new HashMap<String, String>();
          backingMap.put( "a", "1" );
          backingMap.put( "x", null );
          backingMap.put( "b", "2" );
          backingMap.put( "c", "3" );
          backingMap.put( "", "" );
          backingMap.put( null, "1" );
          map = new ImmutableMap<String, String>( backingMap );
      }
  
      @Test
      public void testEntrySet() throws Exception
      {
          Set<Entry<String, String>> entries = map.entrySet();
          assertThat( entries, hasSize( 6 ) );
          assertThat( entries, hasItem( new Node<String, String>( "a", "1" ) ) );
          assertThat( entries, hasItem( new Node<String, String>( "x", null ) ) );
          assertThat( entries, hasItem( new Node<String, String>( "b", "2" ) ) );
          assertThat( entries, hasItem( new Node<String, String>( "c", "3" ) ) );
          assertThat( entries, hasItem( new Node<String, String>( "", "" ) ) );
          assertThat( entries, hasItem( new Node<String, String>( null, "1" ) ) );
      }
  
      @Test
      public void testGetter()
      {
          assertThat( map.size(), is( 6 ) );
          assertThat( map.get( "a" ), is( "1" ) );
          assertThat( map.get( "x" ), is( (String) null ) );
          assertThat( map.get( "b" ), is( "2" ) );
          assertThat( map.get( "c" ), is( "3" ) );
          assertThat( map.get( "" ), is( "" ) );
          assertThat( map.get( null ), is( "1" ) );
      }
  
      @Test( expected = UnsupportedOperationException.class )
      public void shouldNotModifyEntries()
      {
          map.entrySet().clear();
      }
  }