001/*
002 * Copyright (C) 2008 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.testers;
018
019import static com.google.common.collect.testing.features.CollectionSize.ZERO;
020
021import com.google.common.annotations.GwtCompatible;
022import com.google.common.collect.testing.features.CollectionSize;
023import java.util.Arrays;
024import org.junit.Ignore;
025
026/**
027 * A generic JUnit test which tests {@code toArray()} operations on a list. Can't be invoked
028 * directly; please see {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
029 *
030 * @author Chris Povirk
031 */
032@GwtCompatible
033@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
034@SuppressWarnings("JUnit4ClassUsedInJUnit3")
035public class ListToArrayTester<E> extends AbstractListTester<E> {
036  // CollectionToArrayTester tests everything except ordering.
037
038  public void testToArray_noArg() {
039    Object[] actual = getList().toArray();
040    assertArrayEquals("toArray() order should match list", createOrderedArray(), actual);
041  }
042
043  @CollectionSize.Require(absent = ZERO)
044  public void testToArray_tooSmall() {
045    Object[] actual = getList().toArray(new Object[0]);
046    assertArrayEquals("toArray(tooSmall) order should match list", createOrderedArray(), actual);
047  }
048
049  public void testToArray_largeEnough() {
050    Object[] actual = getList().toArray(new Object[getNumElements()]);
051    assertArrayEquals("toArray(largeEnough) order should match list", createOrderedArray(), actual);
052  }
053
054  private static void assertArrayEquals(String message, Object[] expected, Object[] actual) {
055    assertEquals(message, Arrays.asList(expected), Arrays.asList(actual));
056  }
057}