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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.io.output;
18  
19  import java.io.IOException;
20  
21  import org.junit.jupiter.api.Test;
22  
23  /**
24   * Tests {@link NullOutputStream}.
25   */
26  public class NullOutputStreamTest {
27  
28      private void process(final NullOutputStream nos) throws IOException {
29          nos.write("string".getBytes());
30          nos.write("some string".getBytes(), 3, 5);
31          nos.write(1);
32          nos.write(0x0f);
33          nos.flush();
34          nos.close();
35          nos.write("allowed".getBytes());
36          nos.write(255);
37      }
38  
39      @Test
40      public void testNewInstance() throws IOException {
41          try (NullOutputStream nos = NullOutputStream.INSTANCE) {
42              process(nos);
43          }
44      }
45  
46      @Test
47      public void testSingleton() throws IOException {
48          try (NullOutputStream nos = NullOutputStream.INSTANCE) {
49              process(nos);
50          }
51      }
52  
53  }