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 static org.junit.Assert.assertThrows; 20 21 import com.google.common.testing.NullPointerTester; 22 import java.util.concurrent.atomic.AtomicReferenceArray; 23 import junit.framework.TestCase; 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 testNewReference()34 public void testNewReference() throws Exception { 35 assertEquals(null, Atomics.newReference().get()); 36 } 37 testNewReference_withInitialValue()38 public void testNewReference_withInitialValue() throws Exception { 39 assertEquals(null, Atomics.newReference(null).get()); 40 assertEquals(OBJECT, Atomics.newReference(OBJECT).get()); 41 } 42 testNewReferenceArray_withLength()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 assertThrows(IndexOutOfBoundsException.class, () -> refArray.get(length)); 50 } 51 testNewReferenceArray_withNegativeLength()52 public void testNewReferenceArray_withNegativeLength() throws Exception { 53 assertThrows(NegativeArraySizeException.class, () -> Atomics.newReferenceArray(-1)); 54 } 55 testNewReferenceArray_withStringArray()56 public void testNewReferenceArray_withStringArray() throws Exception { 57 String[] array = {"foo", "bar", "baz"}; 58 AtomicReferenceArray<String> refArray = Atomics.newReferenceArray(array); 59 for (int i = 0; i < array.length; ++i) { 60 assertEquals(array[i], refArray.get(i)); 61 } 62 assertThrows(IndexOutOfBoundsException.class, () -> refArray.get(array.length)); 63 } 64 testNewReferenceArray_withNullArray()65 public void testNewReferenceArray_withNullArray() throws Exception { 66 assertThrows(NullPointerException.class, () -> Atomics.newReferenceArray(null)); 67 } 68 testNullPointers()69 public void testNullPointers() { 70 NullPointerTester tester = new NullPointerTester(); 71 tester.testAllPublicConstructors(Atomics.class); // there aren't any 72 tester.testAllPublicStaticMethods(Atomics.class); 73 } 74 } 75