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 /*
  * 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.CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION;
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
A generic JUnit test which tests clear() operations on a collection. Can't be invoked directly; please see com.google.common.collect.testing.CollectionTestSuiteBuilder.

This class is GWT compatible.

Author(s):
George van den Driessche
public class CollectionClearTester<E> extends AbstractCollectionTester<E> {
  public void testClear() {
    .clear();
    assertTrue("After clear(), a collection should be empty.",
        .isEmpty());
  }
  @CollectionSize.Require(absent = )
  public void testClear_unsupported() {
    try {
      .clear();
      fail("clear() should throw UnsupportedOperation if a collection does "
          + "not support it and is not empty.");
    } catch (UnsupportedOperationException expected) {
    }
  }
    try {
      .clear();
    } catch (UnsupportedOperationException tolerated) {
    }
  }
  public void testClearConcurrentWithIteration() {
    try {
      Iterator<E> iterator = .iterator();
      .clear();
      iterator.next();
      /*
       * We prefer for iterators to fail immediately on hasNext, but ArrayList
       * and LinkedList will notably return true on hasNext here!
       */
      fail("Expected ConcurrentModificationException");
    } catch (ConcurrentModificationException expected) {
      // success
    }
  }
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