/*
    * Copyright (C) 2011 The Guava 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
    *
    * 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.google.common.collect;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.base.Function;
  import com.google.common.base.Functions;
  
  import java.util.Map;
  import java.util.SortedMap;
  
  /**
   * Tests for {@link Maps#transformValues(SortedMap, Function)}.
   * 
   * @author Louis Wasserman
   */
  @GwtCompatible
  public class MapsSortedTransformValuesTest extends MapsTransformValuesTest {
  
    @Override
    protected SortedMap<String, String> makeEmptyMap() {
      return Maps.transformValues(Maps.<String, String>newTreeMap(),
          Functions.<String>identity());
    }
  
    @Override
    protected SortedMap<String, String> makePopulatedMap() {
      SortedMap<String, Integer> underlying = Maps.newTreeMap();
      underlying.put("a", 1);
      underlying.put("b", 2);
      underlying.put("c", 3);
      return Maps.transformValues(underlying, Functions.toStringFunction());
    }
  
    public void testTransformValuesSecretlySortedMap() {
      Map<String, String> sortedMap = Maps.newTreeMap();
      assertTrue(Maps.transformValues(sortedMap, Functions.<String>identity())
          instanceof SortedMap);
    }
  }