1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.commons.compress.utils;
21
22 import static org.junit.jupiter.api.Assertions.assertEquals;
23
24 import java.util.HashSet;
25
26 import org.junit.jupiter.api.Test;
27
28 class SetsTest {
29
30 @Test
31 void testNewHashSet() {
32 final HashSet<String> expected = new HashSet<>();
33 assertEquals(expected, Sets.newHashSet());
34 assertEquals(expected, Sets.newHashSet((String[]) null));
35 expected.add("1");
36 assertEquals(expected, Sets.newHashSet("1"));
37 expected.add("2");
38 assertEquals(expected, Sets.newHashSet("2", "1"));
39 }
40 }