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 Doubles#asList(double[])}. 31 * 32 * @author Kevin Bourrillion 33 */ 34@GwtCompatible(emulated = true) 35public class DoubleArrayAsListTest extends TestCase { 36 37 private static List<Double> asList(Double[] values) { 38 double[] temp = new double[values.length]; 39 for (int i = 0; i < values.length; i++) { 40 temp[i] = checkNotNull(values[i]); // checkNotNull for GWT (do not optimize). 41 } 42 return Doubles.asList(temp); 43 } 44 45 // Test generators. To let the GWT test suite generator access them, they need to be 46 // public named classes with a public default constructor. 47 48 public static final class DoublesAsListGenerator extends TestDoubleListGenerator { 49 @Override protected List<Double> create(Double[] elements) { 50 return asList(elements); 51 } 52 } 53 54 public static final class DoublsAsListHeadSubListGenerator extends TestDoubleListGenerator { 55 @Override protected List<Double> create(Double[] elements) { 56 Double[] suffix = {Double.MIN_VALUE, Double.MAX_VALUE}; 57 Double[] all = concat(elements, suffix); 58 return asList(all).subList(0, elements.length); 59 } 60 } 61 62 public static final class DoublesAsListTailSubListGenerator extends TestDoubleListGenerator { 63 @Override protected List<Double> create(Double[] elements) { 64 Double[] prefix = {(double) 86, (double) 99}; 65 Double[] all = concat(prefix, elements); 66 return asList(all).subList(2, elements.length + 2); 67 } 68 } 69 70 public static final class DoublesAsListMiddleSubListGenerator extends TestDoubleListGenerator { 71 @Override protected List<Double> create(Double[] elements) { 72 Double[] prefix = {Double.MIN_VALUE, Double.MAX_VALUE}; 73 Double[] suffix = {(double) 86, (double) 99}; 74 Double[] all = concat(concat(prefix, elements), suffix); 75 return asList(all).subList(2, elements.length + 2); 76 } 77 } 78 79 private static Double[] concat(Double[] left, Double[] right) { 80 Double[] result = new Double[left.length + right.length]; 81 System.arraycopy(left, 0, result, 0, left.length); 82 System.arraycopy(right, 0, result, left.length, right.length); 83 return result; 84 } 85 86 public static abstract class TestDoubleListGenerator 87 implements TestListGenerator<Double> { 88 @Override 89 public SampleElements<Double> samples() { 90 return new SampleDoubles(); 91 } 92 93 @Override 94 public List<Double> create(Object... elements) { 95 Double[] array = new Double[elements.length]; 96 int i = 0; 97 for (Object e : elements) { 98 array[i++] = (Double) e; 99 } 100 return create(array); 101 } 102 103 /** 104 * Creates a new collection containing the given elements; implement this 105 * method instead of {@link #create(Object...)}. 106 */ 107 protected abstract List<Double> create(Double[] elements); 108 109 @Override 110 public Double[] createArray(int length) { 111 return new Double[length]; 112 } 113 114 /** Returns the original element list, unchanged. */ 115 @Override 116 public List<Double> order(List<Double> insertionOrder) { 117 return insertionOrder; 118 } 119 } 120 121 public static class SampleDoubles extends SampleElements<Double> { 122 public SampleDoubles() { 123 super((double) 0, (double) 1, (double) 2, (double) 3, (double) 4); 124 } 125 } 126} 127 128