/*
    * 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 com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.testing.features.CollectionSize;
  
  import java.util.Arrays;
  
  /**
   * A generic JUnit test which tests {@code toArray()} operations on a list.
   * Can't be invoked directly; please see
   * {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
   *
   * @author Chris Povirk
   */
  @GwtCompatible
  public class ListToArrayTester<E> extends AbstractListTester<E> {
    // CollectionToArrayTester tests everything except ordering.
  
    public void testToArray_noArg() {
      Object[] actual = getList().toArray();
      assertArrayEquals("toArray() order should match list",
          createOrderedArray(), actual);
    }
  
    @CollectionSize.Require(absent = ZERO)
    public void testToArray_tooSmall() {
      Object[] actual = getList().toArray(new Object[0]);
      assertArrayEquals("toArray(tooSmall) order should match list",
          createOrderedArray(), actual);
    }
  
    public void testToArray_largeEnough() {
      Object[] actual = getList().toArray(new Object[getNumElements()]);
      assertArrayEquals("toArray(largeEnough) order should match list",
          createOrderedArray(), actual);
    }
  
    private static void assertArrayEquals(String message, Object[] expected,
        Object[] actual) {
      assertEquals(message, Arrays.asList(expected), Arrays.asList(actual));
    }
  }