/*
* Copyright 2002-2012 the original author or 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 org.springframework.core;
import java.util.Comparator;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* Unit tests for the {@link OrderComparator} class.
*
* @author Rick Evans
* @author Stephane Nicoll
*/
public class OrderComparatorTests {
private final OrderComparator comparator = new OrderComparator();
@Test
public void compareOrderedInstancesBefore() {
assertEquals(-1, this.comparator.compare(
new StubOrdered(100), new StubOrdered(2000)));
}
@Test
public void compareOrderedInstancesSame() {
assertEquals(0, this.comparator.compare(
new StubOrdered(100), new StubOrdered(100)));
}
@Test
public void compareOrderedInstancesAfter() {
assertEquals(1, this.comparator.compare(
new StubOrdered(982300), new StubOrdered(100)));
}
@Test
public void compareTwoNonOrderedInstancesEndsUpAsSame() {
assertEquals(0, this.comparator.compare(new Object(), new Object()));
}
@Test
public void compareWithSimpleSourceProvider() {
Comparator<Object> customComparator = this.comparator.withSourceProvider(
new TestSourceProvider(5L, new StubOrdered(25)));
assertEquals(-1, customComparator.compare(new StubOrdered(10), 5L));
}
@Test
public void compareWithSourceProviderArray() {
Comparator<Object> customComparator = this.comparator.withSourceProvider(
new TestSourceProvider(5L, new Object[] {new StubOrdered(10), new StubOrdered(-25)}));
assertEquals(-1, customComparator.compare(5L, new Object()));
}
@Test
public void compareWithSourceProviderArrayNoMatch() {
Comparator<Object> customComparator = this.comparator.withSourceProvider(
new TestSourceProvider(5L, new Object[]{new Object(), new Object()}));
assertEquals(0, customComparator.compare(new Object(), 5L));
}
@Test
public void compareWithSourceProviderEmpty() {
Comparator<Object> customComparator = this.comparator.withSourceProvider(
new TestSourceProvider(50L, new Object()));
assertEquals(0, customComparator.compare(new Object(), 5L));
}
private static final class TestSourceProvider implements OrderComparator.OrderSourceProvider {
private final Object target;
private final Object orderSource;
public TestSourceProvider(Object target, Object orderSource) {
this.target = target;
this.orderSource = orderSource;
}
@Override
public Object getOrderSource(Object obj) {
if (target.equals(obj)) {
return orderSource;
}
return null;
}
}
private static final class StubOrdered implements Ordered {
private final int order;
public StubOrdered(int order) {
this.order = order;
}
@Override
public int getOrder() {
return this.order;
}
}
}