| /* |
| * 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.junit.jupiter.api.Test; |
| |
| /** |
| * Tests {@link ObjectToStringComparator}. |
| */ |
| public class ObjectToStringComparatorTest { |
| |
| 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); |
| } |
| } |