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 com.google.common.annotations.GwtCompatible; 20 import com.google.common.annotations.GwtIncompatible; 21 import com.google.common.collect.testing.Helpers; 22 import com.google.common.testing.NullPointerTester; 23 import com.google.common.testing.SerializableTester; 24 25 import junit.framework.TestCase; 26 27 import java.util.Arrays; 28 import java.util.Collection; 29 import java.util.Collections; 30 import java.util.Comparator; 31 import java.util.List; 32 33 /** 34 * Unit test for {@link Booleans}. 35 * 36 * @author Kevin Bourrillion 37 */ 38 @GwtCompatible(emulated = true) 39 public class BooleansTest extends TestCase { 40 private static final boolean[] EMPTY = {}; 41 private static final boolean[] ARRAY_FALSE = {false}; 42 private static final boolean[] ARRAY_FALSE_FALSE = {false, false}; 43 private static final boolean[] ARRAY_FALSE_TRUE = {false, true}; 44 45 private static final boolean[] VALUES = {false, true}; 46 47 public void testHashCode() { 48 assertEquals(Boolean.TRUE.hashCode(), Booleans.hashCode(true)); 49 assertEquals(Boolean.FALSE.hashCode(), Booleans.hashCode(false)); 50 } 51 52 public void testCompare() { 53 for (boolean x : VALUES) { 54 for (boolean y : VALUES) { 55 // note: spec requires only that the sign is the same 56 assertEquals(x + ", " + y, 57 Boolean.valueOf(x).compareTo(y), 58 Booleans.compare(x, y)); 59 } 60 } 61 } 62 63 public void testContains() { 64 assertFalse(Booleans.contains(EMPTY, false)); 65 assertFalse(Booleans.contains(ARRAY_FALSE, true)); 66 assertTrue(Booleans.contains(ARRAY_FALSE, false)); 67 assertTrue(Booleans.contains(ARRAY_FALSE_TRUE, false)); 68 assertTrue(Booleans.contains(ARRAY_FALSE_TRUE, true)); 69 } 70 71 public void testIndexOf() { 72 assertEquals(-1, Booleans.indexOf(EMPTY, false)); 73 assertEquals(-1, Booleans.indexOf(ARRAY_FALSE, true)); 74 assertEquals(-1, Booleans.indexOf(ARRAY_FALSE_FALSE, true)); 75 assertEquals(0, Booleans.indexOf(ARRAY_FALSE, false)); 76 assertEquals(0, Booleans.indexOf(ARRAY_FALSE_TRUE, false)); 77 assertEquals(1, Booleans.indexOf(ARRAY_FALSE_TRUE, true)); 78 assertEquals(2, Booleans.indexOf(new boolean[] {false, false, true}, true)); 79 } 80 81 public void testLastIndexOf() { 82 assertEquals(-1, Booleans.lastIndexOf(EMPTY, false)); 83 assertEquals(-1, Booleans.lastIndexOf(ARRAY_FALSE, true)); 84 assertEquals(-1, Booleans.lastIndexOf(ARRAY_FALSE_FALSE, true)); 85 assertEquals(0, Booleans.lastIndexOf(ARRAY_FALSE, false)); 86 assertEquals(0, Booleans.lastIndexOf(ARRAY_FALSE_TRUE, false)); 87 assertEquals(1, Booleans.lastIndexOf(ARRAY_FALSE_TRUE, true)); 88 assertEquals(2, Booleans.lastIndexOf(new boolean[] {false, true, true}, true)); 89 } 90 91 public void testConcat() { 92 assertTrue(Arrays.equals(EMPTY, Booleans.concat())); 93 assertTrue(Arrays.equals(EMPTY, Booleans.concat(EMPTY))); 94 assertTrue(Arrays.equals(EMPTY, Booleans.concat(EMPTY, EMPTY, EMPTY))); 95 assertTrue(Arrays.equals(ARRAY_FALSE, Booleans.concat(ARRAY_FALSE))); 96 assertNotSame(ARRAY_FALSE, Booleans.concat(ARRAY_FALSE)); 97 assertTrue(Arrays.equals(ARRAY_FALSE, Booleans.concat(EMPTY, ARRAY_FALSE, EMPTY))); 98 assertTrue(Arrays.equals( 99 new boolean[] {false, false, false}, 100 Booleans.concat(ARRAY_FALSE, ARRAY_FALSE, ARRAY_FALSE))); 101 assertTrue(Arrays.equals( 102 new boolean[] {false, false, true}, 103 Booleans.concat(ARRAY_FALSE, ARRAY_FALSE_TRUE))); 104 } 105 106 public void testEnsureCapacity() { 107 assertSame(EMPTY, Booleans.ensureCapacity(EMPTY, 0, 1)); 108 assertSame(ARRAY_FALSE, Booleans.ensureCapacity(ARRAY_FALSE, 0, 1)); 109 assertSame(ARRAY_FALSE, Booleans.ensureCapacity(ARRAY_FALSE, 1, 1)); 110 assertTrue(Arrays.equals( 111 new boolean[] {true, false, false}, 112 Booleans.ensureCapacity(new boolean[] {true}, 2, 1))); 113 } 114 115 public void testEnsureCapacity_fail() { 116 try { 117 Booleans.ensureCapacity(ARRAY_FALSE, -1, 1); 118 fail(); 119 } catch (IllegalArgumentException expected) { 120 } 121 try { 122 // notice that this should even fail when no growth was needed 123 Booleans.ensureCapacity(ARRAY_FALSE, 1, -1); 124 fail(); 125 } catch (IllegalArgumentException expected) { 126 } 127 } 128 129 public void testJoin() { 130 assertEquals("", Booleans.join(",", EMPTY)); 131 assertEquals("false", Booleans.join(",", ARRAY_FALSE)); 132 assertEquals("false,true", Booleans.join(",", false, true)); 133 assertEquals("falsetruefalse", 134 Booleans.join("", false, true, false)); 135 } 136 137 public void testLexicographicalComparator() { 138 List<boolean[]> ordered = Arrays.asList( 139 new boolean[] {}, 140 new boolean[] {false}, 141 new boolean[] {false, false}, 142 new boolean[] {false, true}, 143 new boolean[] {true}, 144 new boolean[] {true, false}, 145 new boolean[] {true, true}, 146 new boolean[] {true, true, true}); 147 148 Comparator<boolean[]> comparator = Booleans.lexicographicalComparator(); 149 Helpers.testComparator(comparator, ordered); 150 } 151 152 @GwtIncompatible("SerializableTester") 153 public void testLexicographicalComparatorSerializable() { 154 Comparator<boolean[]> comparator = Booleans.lexicographicalComparator(); 155 assertSame(comparator, SerializableTester.reserialize(comparator)); 156 } 157 158 public void testToArray() { 159 // need explicit type parameter to avoid javac warning!? 160 List<Boolean> none = Arrays.<Boolean>asList(); 161 assertTrue(Arrays.equals(EMPTY, Booleans.toArray(none))); 162 163 List<Boolean> one = Arrays.asList(false); 164 assertTrue(Arrays.equals(ARRAY_FALSE, Booleans.toArray(one))); 165 166 boolean[] array = {false, false, true}; 167 168 List<Boolean> three = Arrays.asList(false, false, true); 169 assertTrue(Arrays.equals(array, Booleans.toArray(three))); 170 171 assertTrue(Arrays.equals(array, Booleans.toArray(Booleans.asList(array)))); 172 } 173 174 public void testToArray_threadSafe() { 175 // Only for booleans, we lengthen VALUES 176 boolean[] VALUES = BooleansTest.VALUES; 177 VALUES = Booleans.concat(VALUES, VALUES); 178 179 for (int delta : new int[] { +1, 0, -1 }) { 180 for (int i = 0; i < VALUES.length; i++) { 181 List<Boolean> list = Booleans.asList(VALUES).subList(0, i); 182 Collection<Boolean> misleadingSize = 183 Helpers.misleadingSizeCollection(delta); 184 misleadingSize.addAll(list); 185 boolean[] arr = Booleans.toArray(misleadingSize); 186 assertEquals(i, arr.length); 187 for (int j = 0; j < i; j++) { 188 assertEquals(VALUES[j], arr[j]); 189 } 190 } 191 } 192 } 193 194 public void testToArray_withNull() { 195 List<Boolean> list = Arrays.asList(false, true, null); 196 try { 197 Booleans.toArray(list); 198 fail(); 199 } catch (NullPointerException expected) { 200 } 201 } 202 203 public void testAsListEmpty() { 204 assertSame(Collections.emptyList(), Booleans.asList(EMPTY)); 205 } 206 207 @GwtIncompatible("NullPointerTester") 208 public void testNulls() throws Exception { 209 NullPointerTester tester = new NullPointerTester(); 210 tester.setDefault(boolean[].class, new boolean[0]); 211 tester.testAllPublicStaticMethods(Booleans.class); 212 } 213 } 214
