/*
* Copyright 2002-2017 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.util.comparator;
import java.util.Comparator;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
/**
* Tests for {@link InvertibleComparator}.
*
* @author Keith Donald
* @author Chris Beams
* @author Phillip Webb
*/
@Deprecated
public class InvertibleComparatorTests {
private final Comparator<Integer> comparator = new ComparableComparator<>();
@Test(expected = IllegalArgumentException.class)
public void shouldNeedComparator() throws Exception {
new InvertibleComparator<>(null);
}
@Test(expected = IllegalArgumentException.class)
public void shouldNeedComparatorWithAscending() throws Exception {
new InvertibleComparator<>(null, true);
}
@Test
public void shouldDefaultToAscending() throws Exception {
InvertibleComparator<Integer> invertibleComparator = new InvertibleComparator<>(comparator);
assertThat(invertibleComparator.isAscending(), is(true));
assertThat(invertibleComparator.compare(1, 2), is(-1));
}
@Test
public void shouldInvert() throws Exception {
InvertibleComparator<Integer> invertibleComparator = new InvertibleComparator<>(comparator);
assertThat(invertibleComparator.isAscending(), is(true));
assertThat(invertibleComparator.compare(1, 2), is(-1));
invertibleComparator.invertOrder();
assertThat(invertibleComparator.isAscending(), is(false));
assertThat(invertibleComparator.compare(1, 2), is(1));
}
@Test
public void shouldCompareAscending() throws Exception {
InvertibleComparator<Integer> invertibleComparator = new InvertibleComparator<>(comparator, true);
assertThat(invertibleComparator.compare(1, 2), is(-1));
}
@Test
public void shouldCompareDescending() throws Exception {
InvertibleComparator<Integer> invertibleComparator = new InvertibleComparator<>(comparator, false);
assertThat(invertibleComparator.compare(1, 2), is(1));
}
}