1 /* 2 * Copyright (C) 2008 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect.testing.testers; 18 19 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 20 21 import com.google.common.annotations.GwtCompatible; 22 import com.google.common.collect.testing.features.CollectionSize; 23 24 import java.util.Arrays; 25 26 /** 27 * A generic JUnit test which tests {@code toArray()} operations on a list. 28 * Can't be invoked directly; please see 29 * {@link com.google.common.collect.testing.ListTestSuiteBuilder}. 30 * 31 * @author Chris Povirk 32 */ 33 @GwtCompatible 34 public class ListToArrayTester<E> extends AbstractListTester<E> { 35 // CollectionToArrayTester tests everything except ordering. 36 37 public void testToArray_noArg() { 38 Object[] actual = getList().toArray(); 39 assertArrayEquals("toArray() order should match list", 40 createOrderedArray(), actual); 41 } 42 43 @CollectionSize.Require(absent = ZERO) 44 public void testToArray_tooSmall() { 45 Object[] actual = getList().toArray(new Object[0]); 46 assertArrayEquals("toArray(tooSmall) order should match list", 47 createOrderedArray(), actual); 48 } 49 50 public void testToArray_largeEnough() { 51 Object[] actual = getList().toArray(new Object[getNumElements()]); 52 assertArrayEquals("toArray(largeEnough) order should match list", 53 createOrderedArray(), actual); 54 } 55 56 private static void assertArrayEquals(String message, Object[] expected, 57 Object[] actual) { 58 assertEquals(message, Arrays.asList(expected), Arrays.asList(actual)); 59 } 60 } 61
