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/*
* 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 static org.junit.Assert.assertThrows;
import com.google.common.testing.NullPointerTester;
import java.util.concurrent.atomic.AtomicReferenceArray;
import junit.framework.TestCase;
/**
* 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));
}
assertThrows(IndexOutOfBoundsException.class, () -> refArray.get(length));
}
public void testNewReferenceArray_withNegativeLength() throws Exception {
assertThrows(NegativeArraySizeException.class, () -> Atomics.newReferenceArray(-1));
}
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));
}
assertThrows(IndexOutOfBoundsException.class, () -> refArray.get(array.length));
}
public void testNewReferenceArray_withNullArray() throws Exception {
assertThrows(NullPointerException.class, () -> Atomics.newReferenceArray(null));
}
public void testNullPointers() {
NullPointerTester tester = new NullPointerTester();
tester.testAllPublicConstructors(Atomics.class); // there aren't any
tester.testAllPublicStaticMethods(Atomics.class);
}
}
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