1 /* 2 * Copyright (C) 2010 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.util.concurrent; 18 19 import com.google.common.testing.NullPointerTester; 20 21 import junit.framework.TestCase; 22 23 import java.util.concurrent.atomic.AtomicReferenceArray; 24 25 /** 26 * Unit test for {@link Atomics}. 27 * 28 * @author Kurt Alfred Kluever 29 */ 30 public class AtomicsTest extends TestCase { 31 32 private static final Object OBJECT = new Object(); 33 34 public void testNewReference() throws Exception { 35 assertEquals(null, Atomics.newReference().get()); 36 } 37 38 public void testNewReference_withInitialValue() throws Exception { 39 assertEquals(null, Atomics.newReference(null).get()); 40 assertEquals(OBJECT, Atomics.newReference(OBJECT).get()); 41 } 42 43 public void testNewReferenceArray_withLength() throws Exception { 44 int length = 42; 45 AtomicReferenceArray<String> refArray = Atomics.newReferenceArray(length); 46 for (int i = 0; i < length; ++i) { 47 assertEquals(null, refArray.get(i)); 48 } 49 try { 50 refArray.get(length); 51 fail(); 52 } catch (IndexOutOfBoundsException expected) { 53 } 54 } 55 56 public void testNewReferenceArray_withNegativeLength() throws Exception { 57 try { 58 Atomics.newReferenceArray(-1); 59 fail(); 60 } catch (NegativeArraySizeException expected) { 61 } 62 } 63 64 public void testNewReferenceArray_withStringArray() throws Exception { 65 String[] array = {"foo", "bar", "baz"}; 66 AtomicReferenceArray<String> refArray = Atomics.newReferenceArray(array); 67 for (int i = 0; i < array.length; ++i) { 68 assertEquals(array[i], refArray.get(i)); 69 } 70 try { 71 refArray.get(array.length); 72 fail(); 73 } catch (IndexOutOfBoundsException expected) { 74 } 75 } 76 77 public void testNewReferenceArray_withNullArray() throws Exception { 78 try { 79 Atomics.newReferenceArray(null); 80 fail(); 81 } catch (NullPointerException expected) { 82 } 83 } 84 85 public void testNullPointers() throws Exception { 86 NullPointerTester tester = new NullPointerTester(); 87 tester.testAllPublicConstructors(Atomics.class); // there aren't any 88 tester.testAllPublicStaticMethods(Atomics.class); 89 } 90 } 91
