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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.builder;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
/**
* Tests {@link org.apache.commons.lang3.builder.HashCodeBuilder} and
* {@link org.apache.commons.lang3.builder.EqualsBuilderTest} to insure that equal
* objects must have equal hash codes.
*/
public class HashCodeBuilderAndEqualsBuilderTest {
//-----------------------------------------------------------------------
private void testInteger(final boolean testTransients) {
final Integer i1 = Integer.valueOf(12345);
final Integer i2 = Integer.valueOf(12345);
assertEqualsAndHashCodeContract(i1, i2, testTransients);
}
@Test
public void testInteger() {
testInteger(false);
}
@Test
public void testIntegerWithTransients() {
testInteger(true);
}
@Test
public void testFixture() {
testFixture(false);
}
@Test
public void testFixtureWithTransients() {
testFixture(true);
}
private void testFixture(final boolean testTransients) {
assertEqualsAndHashCodeContract(new TestFixture(2, 'c', "Test", (short) 2), new TestFixture(2, 'c', "Test", (short) 2), testTransients);
assertEqualsAndHashCodeContract(
new AllTransientFixture(2, 'c', "Test", (short) 2),
new AllTransientFixture(2, 'c', "Test", (short) 2),
testTransients);
assertEqualsAndHashCodeContract(
new SubTestFixture(2, 'c', "Test", (short) 2, "Same"),
new SubTestFixture(2, 'c', "Test", (short) 2, "Same"),
testTransients);
assertEqualsAndHashCodeContract(
new SubAllTransientFixture(2, 'c', "Test", (short) 2, "Same"),
new SubAllTransientFixture(2, 'c', "Test", (short) 2, "Same"),
testTransients);
}
/**
* Asserts that if <code>lhs</code> equals <code>rhs</code>
* then their hash codes MUST be identical.
*
* @param lhs The Left-Hand-Side of the equals test
* @param rhs The Right-Hand-Side of the equals test
* @param testTransients whether to test transient fields
*/
private void assertEqualsAndHashCodeContract(final Object lhs, final Object rhs, final boolean testTransients) {
if (EqualsBuilder.reflectionEquals(lhs, rhs, testTransients)) {
// test a couple of times for consistency.
assertEquals(HashCodeBuilder.reflectionHashCode(lhs, testTransients), HashCodeBuilder.reflectionHashCode(rhs, testTransients));
assertEquals(HashCodeBuilder.reflectionHashCode(lhs, testTransients), HashCodeBuilder.reflectionHashCode(rhs, testTransients));
assertEquals(HashCodeBuilder.reflectionHashCode(lhs, testTransients), HashCodeBuilder.reflectionHashCode(rhs, testTransients));
}
}
static class TestFixture {
int i;
char c;
String string;
short s;
TestFixture(final int i, final char c, final String string, final short s) {
this.i = i;
this.c = c;
this.string = string;
this.s = s;
}
}
static class SubTestFixture extends TestFixture {
transient String tString;
SubTestFixture(final int i, final char c, final String string, final short s, final String tString) {
super(i, c, string, s);
this.tString = tString;
}
}
static class AllTransientFixture {
transient int i;
transient char c;
transient String string;
transient short s;
AllTransientFixture(final int i, final char c, final String string, final short s) {
this.i = i;
this.c = c;
this.string = string;
this.s = s;
}
}
static class SubAllTransientFixture extends AllTransientFixture {
transient String tString;
SubAllTransientFixture(final int i, final char c, final String string, final short s, final String tString) {
super(i, c, string, s);
this.tString = tString;
}
}
}
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