/*
    * Copyright (C) 2008 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.testing.testers;
  
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  import static com.google.common.collect.testing.features.MapFeature.*;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.testing.AbstractMapTester;
  import com.google.common.collect.testing.WrongType;
  import com.google.common.collect.testing.features.CollectionSize;
  import com.google.common.collect.testing.features.MapFeature;
  
  /**
   * A generic JUnit test which tests {@code containsValue()} operations on a map.
   * Can't be invoked directly; please see
   * {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
   *
   * @author George van den Driessche
   * @author Chris Povirk
   */
  @GwtCompatible
  public class MapContainsValueTester<K, V> extends AbstractMapTester<K, V> {
    @CollectionSize.Require(absent = ZERO)
    public void testContains_yes() {
      assertTrue("containsValue(present) should return true",
          getMap().containsValue(samples.e0.getValue()));
    }
  
    public void testContains_no() {
      assertFalse("containsValue(notPresent) should return false",
          getMap().containsValue(samples.e3.getValue()));
    }
  
    @MapFeature.Require(ALLOWS_NULL_VALUE_QUERIES)
    public void testContains_nullNotContainedButAllowed() {
      assertFalse("containsValue(null) should return false",
          getMap().containsValue(null));
    }
  
    @MapFeature.Require(absent = ALLOWS_NULL_VALUE_QUERIES)
    public void testContains_nullNotContainedAndUnsupported() {
      expectNullValueMissingWhenNullValuesUnsupported(
          "containsValue(null) should return false or throw");
    }
  
    @MapFeature.Require(ALLOWS_NULL_VALUES)
    @CollectionSize.Require(absent = ZERO)
    public void testContains_nonNullWhenNullContained() {
      initMapWithNullValue();
      assertFalse("containsValue(notPresent) should return false",
          getMap().containsValue(samples.e3.getValue()));
    }
  
    @MapFeature.Require(ALLOWS_NULL_VALUES)
    @CollectionSize.Require(absent = ZERO)
    public void testContains_nullContained() {
      initMapWithNullValue();
      assertTrue("containsValue(null) should return true",
          getMap().containsValue(null));
    }
  
    public void testContains_wrongType() {
      try {
        //noinspection SuspiciousMethodCalls
        assertFalse("containsValue(wrongType) should return false or throw",
            getMap().containsValue(WrongType.VALUE));
      } catch (ClassCastException tolerated) {
      }
    }
  }