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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   * http://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  package org.apache.commons.compress.utils;
20  
21  import static org.junit.jupiter.api.Assertions.assertFalse;
22  import static org.junit.jupiter.api.Assertions.assertThrows;
23  
24  import java.util.NoSuchElementException;
25  
26  import org.junit.jupiter.api.Test;
27  
28  /**
29   * Unit tests for class {@link ServiceLoaderIterator org.apache.commons.compress.utils.ServiceLoaderIterator}.
30   *
31   * @see ServiceLoaderIterator
32   */
33  public class ServiceLoaderIteratorTest {
34  
35      @Test
36      public void testHasNextReturnsFalse() {
37          final Class<Object> clasz = Object.class;
38          final ServiceLoaderIterator<Object> serviceLoaderIterator = new ServiceLoaderIterator<>(clasz);
39          final boolean result = serviceLoaderIterator.hasNext();
40          assertFalse(result);
41      }
42  
43      @Test
44      public void testNextThrowsNoSuchElementException() {
45          final Class<String> clasz = String.class;
46          final ServiceLoaderIterator<String> serviceLoaderIterator = new ServiceLoaderIterator<>(clasz);
47          assertThrows(NoSuchElementException.class, () -> serviceLoaderIterator.next());
48      }
49  
50      @Test
51      public void testRemoveThrowsUnsupportedOperationException() {
52          final Class<Integer> clasz = Integer.class;
53          final ServiceLoaderIterator<Integer> serviceLoaderIterator = new ServiceLoaderIterator<>(clasz);
54          assertThrows(UnsupportedOperationException.class, () -> serviceLoaderIterator.remove());
55      }
56  
57  }