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 17package com.google.common.primitives; 18 19import static com.google.common.base.Preconditions.checkNotNull; 20 21import com.google.common.annotations.GwtCompatible; 22import com.google.common.collect.testing.SampleElements; 23import com.google.common.collect.testing.TestListGenerator; 24 25import junit.framework.TestCase; 26 27import java.util.List; 28 29/** 30 * Test suite covering {@link Ints#asList(int[])}. 31 * 32 * @author Kevin Bourrillion 33 */ 34@GwtCompatible(emulated = true) 35@SuppressWarnings("cast") // redundant casts are intentional and harmless 36public class IntArrayAsListTest extends TestCase { 37 38 private static List<Integer> asList(Integer[] values) { 39 int[] temp = new int[values.length]; 40 for (int i = 0; i < values.length; i++) { 41 temp[i] = checkNotNull(values[i]); // checkNotNull for GWT (do not optimize). 42 } 43 return Ints.asList(temp); 44 } 45 46 // Test generators. To let the GWT test suite generator access them, they need to be 47 // public named classes with a public default constructor. 48 49 public static final class IntsAsListGenerator extends TestIntegerListGenerator { 50 @Override protected List<Integer> create(Integer[] elements) { 51 return asList(elements); 52 } 53 } 54 55 public static final class IntsAsListHeadSubListGenerator extends TestIntegerListGenerator { 56 @Override protected List<Integer> create(Integer[] elements) { 57 Integer[] suffix = {Integer.MIN_VALUE, Integer.MAX_VALUE}; 58 Integer[] all = concat(elements, suffix); 59 return asList(all).subList(0, elements.length); 60 } 61 } 62 63 public static final class IntsAsListTailSubListGenerator extends TestIntegerListGenerator { 64 @Override protected List<Integer> create(Integer[] elements) { 65 Integer[] prefix = {(int) 86, (int) 99}; 66 Integer[] all = concat(prefix, elements); 67 return asList(all).subList(2, elements.length + 2); 68 } 69 } 70 71 public static final class IntsAsListMiddleSubListGenerator extends TestIntegerListGenerator { 72 @Override protected List<Integer> create(Integer[] elements) { 73 Integer[] prefix = {Integer.MIN_VALUE, Integer.MAX_VALUE}; 74 Integer[] suffix = {(int) 86, (int) 99}; 75 Integer[] all = concat(concat(prefix, elements), suffix); 76 return asList(all).subList(2, elements.length + 2); 77 } 78 } 79 80 private static Integer[] concat(Integer[] left, Integer[] right) { 81 Integer[] result = new Integer[left.length + right.length]; 82 System.arraycopy(left, 0, result, 0, left.length); 83 System.arraycopy(right, 0, result, left.length, right.length); 84 return result; 85 } 86 87 public static abstract class TestIntegerListGenerator 88 implements TestListGenerator<Integer> { 89 @Override 90 public SampleElements<Integer> samples() { 91 return new SampleIntegers(); 92 } 93 94 @Override 95 public List<Integer> create(Object... elements) { 96 Integer[] array = new Integer[elements.length]; 97 int i = 0; 98 for (Object e : elements) { 99 array[i++] = (Integer) e; 100 } 101 return create(array); 102 } 103 104 /** 105 * Creates a new collection containing the given elements; implement this 106 * method instead of {@link #create(Object...)}. 107 */ 108 protected abstract List<Integer> create(Integer[] elements); 109 110 @Override public Integer[] createArray(int length) { 111 return new Integer[length]; 112 } 113 114 /** Returns the original element list, unchanged. */ 115 @Override 116 public List<Integer> order(List<Integer> insertionOrder) { 117 return insertionOrder; 118 } 119 } 120 121 public static class SampleIntegers extends SampleElements<Integer> { 122 public SampleIntegers() { 123 super((int) 0, (int) 1, (int) 2, (int) 3, (int) 4); 124 } 125 } 126} 127 128