/* * Copyright (C) 2010 The Guava Authors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.google.common.util.concurrent; import com.google.common.testing.NullPointerTester; import junit.framework.TestCase; import java.util.concurrent.atomic.AtomicReferenceArray; /** * Unit test for {@link Atomics}. * * @author Kurt Alfred Kluever */ public class AtomicsTest extends TestCase { private static final Object OBJECT = new Object(); public void testNewReference() throws Exception { assertEquals(null, Atomics.newReference().get()); } public void testNewReference_withInitialValue() throws Exception { assertEquals(null, Atomics.newReference(null).get()); assertEquals(OBJECT, Atomics.newReference(OBJECT).get()); } public void testNewReferenceArray_withLength() throws Exception { int length = 42; AtomicReferenceArray<String> refArray = Atomics.newReferenceArray(length); for (int i = 0; i < length; ++i) { assertEquals(null, refArray.get(i)); } try { refArray.get(length); fail(); } catch (IndexOutOfBoundsException expected) { } } public void testNewReferenceArray_withNegativeLength() throws Exception { try { Atomics.newReferenceArray(-1); fail(); } catch (NegativeArraySizeException expected) { } } public void testNewReferenceArray_withStringArray() throws Exception { String[] array = {"foo", "bar", "baz"}; AtomicReferenceArray<String> refArray = Atomics.newReferenceArray(array); for (int i = 0; i < array.length; ++i) { assertEquals(array[i], refArray.get(i)); } try { refArray.get(array.length); fail(); } catch (IndexOutOfBoundsException expected) { } } public void testNewReferenceArray_withNullArray() throws Exception { try { Atomics.newReferenceArray(null); fail(); } catch (NullPointerException expected) { } } public void testNullPointers() throws Exception { NullPointerTester tester = new NullPointerTester(); tester.testAllPublicConstructors(Atomics.class); // there aren't any tester.testAllPublicStaticMethods(Atomics.class); } }