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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.compare;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang3.AbstractLangTest;
import org.junit.jupiter.api.Test;
/**
* Tests {@link ObjectToStringComparator}.
*/
public class ObjectToStringComparatorTest extends AbstractLangTest {
private static class Thing {
final String string;
Thing(final String string) {
this.string = string;
}
@Override
public String toString() {
return string;
}
}
@Test
public void testNull() {
final List<Thing> things = Arrays.asList(null, new Thing("y"), null);
things.sort(ObjectToStringComparator.INSTANCE);
assertEquals("y", things.get(0).string);
assertNull(things.get(1));
assertNull(things.get(2));
}
@Test
public void testNullToString() {
final List<Thing> things = Arrays.asList(new Thing(null), new Thing("y"), new Thing(null));
things.sort(ObjectToStringComparator.INSTANCE);
assertEquals("y", things.get(0).string);
assertNull(things.get(1).string);
assertNull(things.get(2).string);
}
@Test
public void testSortCollection() {
final List<Thing> things = Arrays.asList(new Thing("z"), new Thing("y"), new Thing("x"));
things.sort(ObjectToStringComparator.INSTANCE);
assertEquals("x", things.get(0).string);
assertEquals("y", things.get(1).string);
assertEquals("z", things.get(2).string);
}
}
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