/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.lang3.concurrent;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.regex.Pattern;
import org.junit.Before;
import org.junit.Test;
/**
* Test class for {@code ConstantInitializer}.
*
* @version $Id$
*/
public class ConstantInitializerTest {
/** Constant for the object managed by the initializer. */
private static final Integer VALUE = 42;
/** The initializer to be tested. */
private ConstantInitializer<Integer> init;
@Before
public void setUp() throws Exception {
init = new ConstantInitializer<Integer>(VALUE);
}
/**
* Helper method for testing equals() and hashCode().
*
* @param obj the object to compare with the test instance
* @param expected the expected result
*/
private void checkEquals(final Object obj, final boolean expected) {
assertTrue("Wrong result of equals", expected == init.equals(obj));
if (obj != null) {
assertTrue("Not symmetric", expected == obj.equals(init));
if (expected) {
assertEquals("Different hash codes", init.hashCode(),
obj.hashCode());
}
}
}
/**
* Tests whether the correct object is returned.
*/
@Test
public void testGetObject() {
assertEquals("Wrong object", VALUE, init.getObject());
}
/**
* Tests whether get() returns the correct object.
*/
@Test
public void testGet() throws ConcurrentException {
assertEquals("Wrong object", VALUE, init.get());
}
/**
* Tests equals() if the expected result is true.
*/
@Test
public void testEqualsTrue() {
checkEquals(init, true);
ConstantInitializer<Integer> init2 = new ConstantInitializer<Integer>(
Integer.valueOf(VALUE.intValue()));
checkEquals(init2, true);
init = new ConstantInitializer<Integer>(null);
init2 = new ConstantInitializer<Integer>(null);
checkEquals(init2, true);
}
/**
* Tests equals() if the expected result is false.
*/
@Test
public void testEqualsFalse() {
ConstantInitializer<Integer> init2 = new ConstantInitializer<Integer>(
null);
checkEquals(init2, false);
init2 = new ConstantInitializer<Integer>(VALUE + 1);
checkEquals(init2, false);
}
/**
* Tests equals() with objects of other classes.
*/
@Test
public void testEqualsWithOtherObjects() {
checkEquals(null, false);
checkEquals(this, false);
checkEquals(new ConstantInitializer<String>("Test"), false);
}
/**
* Tests the string representation.
*/
@Test
public void testToString() {
final String s = init.toString();
final Pattern pattern = Pattern
.compile("ConstantInitializer@\\d+ \\[ object = " + VALUE
+ " \\]");
assertTrue("Wrong string: " + s, pattern.matcher(s).matches());
}
/**
* Tests the string representation if the managed object is null.
*/
@Test
public void testToStringNull() {
final String s = new ConstantInitializer<Object>(null).toString();
assertTrue("Object not found: " + s, s.indexOf("object = null") > 0);
}
}