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.primitives; 18 19 import static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.common.annotations.GwtCompatible; 22 import com.google.common.annotations.GwtIncompatible; 23 import com.google.common.annotations.J2ktIncompatible; 24 import com.google.common.collect.ImmutableList; 25 import com.google.common.collect.testing.ListTestSuiteBuilder; 26 import com.google.common.collect.testing.SampleElements; 27 import com.google.common.collect.testing.TestListGenerator; 28 import com.google.common.collect.testing.features.CollectionFeature; 29 import com.google.common.collect.testing.features.CollectionSize; 30 import com.google.common.collect.testing.features.ListFeature; 31 import java.util.List; 32 import junit.framework.Test; 33 import junit.framework.TestCase; 34 import junit.framework.TestSuite; 35 36 /** 37 * Test suite covering {@link Ints#asList(int[])}. 38 * 39 * @author Kevin Bourrillion 40 */ 41 @GwtCompatible(emulated = true) 42 @SuppressWarnings("cast") // redundant casts are intentional and harmless 43 public class IntArrayAsListTest extends TestCase { 44 asList(Integer[] values)45 private static List<Integer> asList(Integer[] values) { 46 int[] temp = new int[values.length]; 47 for (int i = 0; i < values.length; i++) { 48 temp[i] = checkNotNull(values[i]); // checkNotNull for GWT (do not optimize). 49 } 50 return Ints.asList(temp); 51 } 52 53 @J2ktIncompatible 54 @GwtIncompatible // suite suite()55 public static Test suite() { 56 List<ListTestSuiteBuilder<Integer>> builders = 57 ImmutableList.of( 58 ListTestSuiteBuilder.using(new IntsAsListGenerator()).named("Ints.asList"), 59 ListTestSuiteBuilder.using(new IntsAsListHeadSubListGenerator()) 60 .named("Ints.asList, head subList"), 61 ListTestSuiteBuilder.using(new IntsAsListTailSubListGenerator()) 62 .named("Ints.asList, tail subList"), 63 ListTestSuiteBuilder.using(new IntsAsListMiddleSubListGenerator()) 64 .named("Ints.asList, middle subList")); 65 66 TestSuite suite = new TestSuite(); 67 for (ListTestSuiteBuilder<Integer> builder : builders) { 68 suite.addTest( 69 builder 70 .withFeatures( 71 CollectionSize.ONE, 72 CollectionSize.SEVERAL, 73 CollectionFeature.RESTRICTS_ELEMENTS, 74 ListFeature.SUPPORTS_SET) 75 .createTestSuite()); 76 } 77 return suite; 78 } 79 80 // Test generators. To let the GWT test suite generator access them, they need to be 81 // public named classes with a public default constructor. 82 83 public static final class IntsAsListGenerator extends TestIntegerListGenerator { 84 @Override create(Integer[] elements)85 protected List<Integer> create(Integer[] elements) { 86 return asList(elements); 87 } 88 } 89 90 public static final class IntsAsListHeadSubListGenerator extends TestIntegerListGenerator { 91 @Override create(Integer[] elements)92 protected List<Integer> create(Integer[] elements) { 93 Integer[] suffix = {Integer.MIN_VALUE, Integer.MAX_VALUE}; 94 Integer[] all = concat(elements, suffix); 95 return asList(all).subList(0, elements.length); 96 } 97 } 98 99 public static final class IntsAsListTailSubListGenerator extends TestIntegerListGenerator { 100 @Override create(Integer[] elements)101 protected List<Integer> create(Integer[] elements) { 102 Integer[] prefix = {(int) 86, (int) 99}; 103 Integer[] all = concat(prefix, elements); 104 return asList(all).subList(2, elements.length + 2); 105 } 106 } 107 108 public static final class IntsAsListMiddleSubListGenerator extends TestIntegerListGenerator { 109 @Override create(Integer[] elements)110 protected List<Integer> create(Integer[] elements) { 111 Integer[] prefix = {Integer.MIN_VALUE, Integer.MAX_VALUE}; 112 Integer[] suffix = {(int) 86, (int) 99}; 113 Integer[] all = concat(concat(prefix, elements), suffix); 114 return asList(all).subList(2, elements.length + 2); 115 } 116 } 117 concat(Integer[] left, Integer[] right)118 private static Integer[] concat(Integer[] left, Integer[] right) { 119 Integer[] result = new Integer[left.length + right.length]; 120 System.arraycopy(left, 0, result, 0, left.length); 121 System.arraycopy(right, 0, result, left.length, right.length); 122 return result; 123 } 124 125 public abstract static class TestIntegerListGenerator implements TestListGenerator<Integer> { 126 @Override samples()127 public SampleElements<Integer> samples() { 128 return new SampleIntegers(); 129 } 130 131 @Override create(Object... elements)132 public List<Integer> create(Object... elements) { 133 Integer[] array = new Integer[elements.length]; 134 int i = 0; 135 for (Object e : elements) { 136 array[i++] = (Integer) e; 137 } 138 return create(array); 139 } 140 141 /** 142 * Creates a new collection containing the given elements; implement this method instead of 143 * {@link #create(Object...)}. 144 */ create(Integer[] elements)145 protected abstract List<Integer> create(Integer[] elements); 146 147 @Override createArray(int length)148 public Integer[] createArray(int length) { 149 return new Integer[length]; 150 } 151 152 /** Returns the original element list, unchanged. */ 153 @Override order(List<Integer> insertionOrder)154 public List<Integer> order(List<Integer> insertionOrder) { 155 return insertionOrder; 156 } 157 } 158 159 public static class SampleIntegers extends SampleElements<Integer> { SampleIntegers()160 public SampleIntegers() { 161 super((int) 0, (int) 1, (int) 2, (int) 3, (int) 4); 162 } 163 } 164 } 165