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/*
* 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.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.regex.Pattern;
import org.apache.commons.lang3.AbstractLangTest;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
/**
* Test class for {@code ConstantInitializer}.
*/
public class ConstantInitializerTest extends AbstractLangTest {
/** Constant for the object managed by the initializer. */
private static final Integer VALUE = 42;
/** The initializer to be tested. */
private ConstantInitializer<Integer> init;
@BeforeEach
public void setUp() {
init = new ConstantInitializer<>(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) {
assertEquals(expected, init.equals(obj), "Wrong result of equals");
if (obj != null) {
assertEquals(expected, obj.equals(init), "Not symmetric");
if (expected) {
assertEquals(init.hashCode(), obj.hashCode(), "Different hash codes");
}
}
}
/**
* Tests whether the correct object is returned.
*/
@Test
public void testGetObject() {
assertEquals(VALUE, init.getObject(), "Wrong object");
}
/**
* Tests whether get() returns the correct object.
*
* @throws org.apache.commons.lang3.concurrent.ConcurrentException so we don't have to catch it
*/
@Test
public void testGet() throws ConcurrentException {
assertEquals(VALUE, init.get(), "Wrong object");
}
/**
* Tests equals() if the expected result is true.
*/
@Test
public void testEqualsTrue() {
checkEquals(init, true);
ConstantInitializer<Integer> init2 = new ConstantInitializer<>(
Integer.valueOf(VALUE.intValue()));
checkEquals(init2, true);
init = new ConstantInitializer<>(null);
init2 = new ConstantInitializer<>(null);
checkEquals(init2, true);
}
/**
* Tests equals() if the expected result is false.
*/
@Test
public void testEqualsFalse() {
ConstantInitializer<Integer> init2 = new ConstantInitializer<>(
null);
checkEquals(init2, false);
init2 = new ConstantInitializer<>(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<>("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(pattern.matcher(s).matches(), "Wrong string: " + s);
}
/**
* Tests the string representation if the managed object is null.
*/
@Test
public void testToStringNull() {
final String s = new ConstantInitializer<>(null).toString();
assertTrue(s.indexOf("object = null") > 0, "Object not found: " + s);
}
}
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