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.collect.ImmutableList; 24 import com.google.common.collect.testing.ListTestSuiteBuilder; 25 import com.google.common.collect.testing.SampleElements; 26 import com.google.common.collect.testing.TestListGenerator; 27 import com.google.common.collect.testing.features.CollectionFeature; 28 import com.google.common.collect.testing.features.CollectionSize; 29 import com.google.common.collect.testing.features.ListFeature; 30 31 import junit.framework.Test; 32 import junit.framework.TestCase; 33 import junit.framework.TestSuite; 34 35 import java.util.List; 36 37 /** 38 * Test suite covering {@link Doubles#asList(double[])}. 39 * 40 * @author Kevin Bourrillion 41 */ 42 @GwtCompatible(emulated = true) 43 public class DoubleArrayAsListTest extends TestCase { 44 45 private static List<Double> asList(Double[] values) { 46 double[] temp = new double[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 Doubles.asList(temp); 51 } 52 53 @GwtIncompatible("suite") 54 public static Test suite() { 55 List<ListTestSuiteBuilder<Double>> builders = 56 ImmutableList.of( 57 ListTestSuiteBuilder.using(new DoublesAsListGenerator()) 58 .named("Doubles.asList"), 59 60 ListTestSuiteBuilder.using(new DoublsAsListHeadSubListGenerator()) 61 .named("Doubles.asList, head subList"), 62 63 ListTestSuiteBuilder.using(new DoublesAsListTailSubListGenerator()) 64 .named("Doubles.asList, tail subList"), 65 66 ListTestSuiteBuilder.using(new DoublesAsListMiddleSubListGenerator()) 67 .named("Doubles.asList, middle subList") 68 ); 69 70 TestSuite suite = new TestSuite(); 71 for (ListTestSuiteBuilder<Double> builder : builders) { 72 suite.addTest( 73 builder 74 .withFeatures(CollectionSize.ONE, 75 CollectionSize.SEVERAL, 76 CollectionFeature.RESTRICTS_ELEMENTS, 77 ListFeature.SUPPORTS_SET) 78 .createTestSuite()); 79 } 80 return suite; 81 } 82 83 // Test generators. To let the GWT test suite generator access them, they need to be 84 // public named classes with a public default constructor. 85 86 public static final class DoublesAsListGenerator extends TestDoubleListGenerator { 87 @Override protected List<Double> create(Double[] elements) { 88 return asList(elements); 89 } 90 } 91 92 public static final class DoublsAsListHeadSubListGenerator extends TestDoubleListGenerator { 93 @Override protected List<Double> create(Double[] elements) { 94 Double[] suffix = {Double.MIN_VALUE, Double.MAX_VALUE}; 95 Double[] all = concat(elements, suffix); 96 return asList(all).subList(0, elements.length); 97 } 98 } 99 100 public static final class DoublesAsListTailSubListGenerator extends TestDoubleListGenerator { 101 @Override protected List<Double> create(Double[] elements) { 102 Double[] prefix = {(double) 86, (double) 99}; 103 Double[] all = concat(prefix, elements); 104 return asList(all).subList(2, elements.length + 2); 105 } 106 } 107 108 public static final class DoublesAsListMiddleSubListGenerator extends TestDoubleListGenerator { 109 @Override protected List<Double> create(Double[] elements) { 110 Double[] prefix = {Double.MIN_VALUE, Double.MAX_VALUE}; 111 Double[] suffix = {(double) 86, (double) 99}; 112 Double[] all = concat(concat(prefix, elements), suffix); 113 return asList(all).subList(2, elements.length + 2); 114 } 115 } 116 117 private static Double[] concat(Double[] left, Double[] right) { 118 Double[] result = new Double[left.length + right.length]; 119 System.arraycopy(left, 0, result, 0, left.length); 120 System.arraycopy(right, 0, result, left.length, right.length); 121 return result; 122 } 123 124 public static abstract class TestDoubleListGenerator 125 implements TestListGenerator<Double> { 126 @Override 127 public SampleElements<Double> samples() { 128 return new SampleDoubles(); 129 } 130 131 @Override 132 public List<Double> create(Object... elements) { 133 Double[] array = new Double[elements.length]; 134 int i = 0; 135 for (Object e : elements) { 136 array[i++] = (Double) e; 137 } 138 return create(array); 139 } 140 141 /** 142 * Creates a new collection containing the given elements; implement this 143 * method instead of {@link #create(Object...)}. 144 */ 145 protected abstract List<Double> create(Double[] elements); 146 147 @Override 148 public Double[] createArray(int length) { 149 return new Double[length]; 150 } 151 152 /** Returns the original element list, unchanged. */ 153 @Override 154 public List<Double> order(List<Double> insertionOrder) { 155 return insertionOrder; 156 } 157 } 158 159 public static class SampleDoubles extends SampleElements<Double> { 160 public SampleDoubles() { 161 super((double) 0, (double) 1, (double) 2, (double) 3, (double) 4); 162 } 163 } 164 } 165
