/*
    * Copyright (C) 2007 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.CollectionFeature.ALLOWS_NULL_QUERIES;
  import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.testing.AbstractCollectionTester;
  import com.google.common.collect.testing.MinimalCollection;
  import com.google.common.collect.testing.WrongType;
  import com.google.common.collect.testing.features.CollectionFeature;
  import com.google.common.collect.testing.features.CollectionSize;
  
  import java.util.Collection;
  
  /**
   * A generic JUnit test which tests {@code containsAll()} operations on a
   * collection. Can't be invoked directly; please see
   * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
   *
   * @author Kevin Bourrillion
   * @author Chris Povirk
   */
  @SuppressWarnings("unchecked") // too many "unchecked generic array creations"
  @GwtCompatible
  public class CollectionContainsAllTester<E>
      extends AbstractCollectionTester<E> {
    public void testContainsAll_empty() {
      assertTrue("containsAll(empty) should return true",
          collection.containsAll(MinimalCollection.of()));
    }
  
    @CollectionSize.Require(absent = ZERO)
    public void testContainsAll_subset() {
      assertTrue("containsAll(subset) should return true",
          collection.containsAll(MinimalCollection.of(samples.e0)));
    }
  
    public void testContainsAll_sameElements() {
      assertTrue("containsAll(sameElements) should return true",
          collection.containsAll(MinimalCollection.of(createSamplesArray())));
    }
  
    @SuppressWarnings("ModifyingCollectionWithItself")
    public void testContainsAll_self() {
      assertTrue("containsAll(this) should return true",
          collection.containsAll(collection));
    }
  
    public void testContainsAll_partialOverlap() {
      assertFalse("containsAll(partialOverlap) should return false",
          collection.containsAll(MinimalCollection.of(samples.e0, samples.e3)));
    }
  
    public void testContainsAll_disjoint() {
      assertFalse("containsAll(disjoint) should return false",
          collection.containsAll(MinimalCollection.of(samples.e3)));
    }
  
    @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES)
    public void testContainsAll_nullNotAllowed() {
      try {
        assertFalse(collection.containsAll(MinimalCollection.of((E) null)));
      } catch (NullPointerException tolerated) {}
    }
  
    @CollectionFeature.Require(ALLOWS_NULL_QUERIES)
    public void testContainsAll_nullAllowed() {
      assertFalse(collection.containsAll(MinimalCollection.of((E) null)));
    }
  
    @CollectionFeature.Require(ALLOWS_NULL_VALUES)
    @CollectionSize.Require(absent = ZERO)
    public void testContainsAll_nullPresent() {
      initCollectionWithNullElement();
      assertTrue(collection.containsAll(MinimalCollection.of((E) null)));
    }
  
    public void testContainsAll_wrongType() {
      Collection<WrongType> wrong = MinimalCollection.of(WrongType.VALUE);
      try {
        assertFalse("containsAll(wrongType) should return false or throw",
            collection.containsAll(wrong));
     } catch (ClassCastException tolerated) {
     }
   }
 }