/*
    * 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_VALUES;
  import static com.google.common.collect.testing.features.CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION;
  import static com.google.common.collect.testing.features.CollectionFeature.RESTRICTS_ELEMENTS;
  import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  import static java.util.Collections.singletonList;
  
  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.features.CollectionFeature;
  import com.google.common.collect.testing.features.CollectionSize;
  
  import java.util.ConcurrentModificationException;
  import java.util.Iterator;
  import java.util.List;
  
  /**
   * A generic JUnit test which tests addAll operations on a collection. Can't be
   * invoked directly; please see
   * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
   *
   * @author Chris Povirk
   * @author Kevin Bourrillion
   */
  @SuppressWarnings("unchecked") // too many "unchecked generic array creations"
  @GwtCompatible(emulated = true)
  public class CollectionAddAllTester<E> extends AbstractCollectionTester<E> {
    @CollectionFeature.Require(SUPPORTS_ADD)
    public void testAddAll_supportedNothing() {
      assertFalse("addAll(nothing) should return false",
          collection.addAll(emptyCollection()));
      expectUnchanged();
    }
  
    @CollectionFeature.Require(absent = SUPPORTS_ADD)
    public void testAddAll_unsupportedNothing() {
      try {
        assertFalse("addAll(nothing) should return false or throw",
            collection.addAll(emptyCollection()));
      } catch (UnsupportedOperationException tolerated) {
      }
      expectUnchanged();
    }
  
    @CollectionFeature.Require(SUPPORTS_ADD)
    public void testAddAll_supportedNonePresent() {
      assertTrue("addAll(nonePresent) should return true",
          collection.addAll(createDisjointCollection()));
      expectAdded(samples.e3, samples.e4);
    }
  
    @CollectionFeature.Require(absent = SUPPORTS_ADD)
    public void testAddAll_unsupportedNonePresent() {
      try {
        collection.addAll(createDisjointCollection());
        fail("addAll(nonePresent) should throw");
      } catch (UnsupportedOperationException expected) {
      }
      expectUnchanged();
      expectMissing(samples.e3, samples.e4);
    }
  
    @CollectionFeature.Require(SUPPORTS_ADD)
    @CollectionSize.Require(absent = ZERO)
    public void testAddAll_supportedSomePresent() {
      assertTrue("addAll(somePresent) should return true",
          collection.addAll(MinimalCollection.of(samples.e3, samples.e0)));
      assertTrue("should contain " + samples.e3, collection.contains(samples.e3));
      assertTrue("should contain " + samples.e0, collection.contains(samples.e0));
    }
  
    @CollectionFeature.Require(absent = SUPPORTS_ADD)
    @CollectionSize.Require(absent = ZERO)
    public void testAddAll_unsupportedSomePresent() {
      try {
        collection.addAll(MinimalCollection.of(samples.e3, samples.e0));
        fail("addAll(somePresent) should throw");
      } catch (UnsupportedOperationException expected) {
      }
      expectUnchanged();
   }
 
   @CollectionFeature.Require({SUPPORTS_ADD,
       FAILS_FAST_ON_CONCURRENT_MODIFICATION})
   @CollectionSize.Require(absent = ZERO)
   public void testAddAllConcurrentWithIteration() {
     try {
       Iterator<E> iterator = collection.iterator();
       assertTrue(collection.addAll(MinimalCollection.of(samples.e3, samples.e0)));
       iterator.next();
       fail("Expected ConcurrentModificationException");
     } catch (ConcurrentModificationException expected) {
       // success
     }
   }
 
   @CollectionFeature.Require(absent = SUPPORTS_ADD)
   @CollectionSize.Require(absent = ZERO)
   public void testAddAll_unsupportedAllPresent() {
     try {
       assertFalse("addAll(allPresent) should return false or throw",
           collection.addAll(MinimalCollection.of(samples.e0)));
     } catch (UnsupportedOperationException tolerated) {
     }
     expectUnchanged();
   }
 
   @CollectionFeature.Require(value = {SUPPORTS_ADD,
       ALLOWS_NULL_VALUES}, absent = RESTRICTS_ELEMENTS)
   public void testAddAll_nullSupported() {
     List<E> containsNull = singletonList(null);
     assertTrue("addAll(containsNull) should return true", collection
         .addAll(containsNull));
     /*
      * We need (E) to force interpretation of null as the single element of a
      * varargs array, not the array itself
      */
     expectAdded((E) null);
   }
 
   @CollectionFeature.Require(value = SUPPORTS_ADD,
       absent = ALLOWS_NULL_VALUES)
   public void testAddAll_nullUnsupported() {
     List<E> containsNull = singletonList(null);
     try {
       collection.addAll(containsNull);
       fail("addAll(containsNull) should throw");
     } catch (NullPointerException expected) {
     }
     expectUnchanged();
     expectNullMissingWhenNullUnsupported(
         "Should not contain null after unsupported addAll(containsNull)");
   }
 
   @CollectionFeature.Require(SUPPORTS_ADD)
   public void testAddAll_nullCollectionReference() {
     try {
       collection.addAll(null);
       fail("addAll(null) should throw NullPointerException");
     } catch (NullPointerException expected) {
     }
   }
 }