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 * https://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 NullPrintStream}.
25 */
26 class NullPrintStreamTest {
27
28 private void process(final NullPrintStream 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 void testNullNewInstance() throws IOException {
41 try (NullPrintStream nos = new NullPrintStream()) {
42 process(nos);
43 }
44 }
45
46 @Test
47 void testNullSingleton() throws IOException {
48 try (NullPrintStream nos = NullPrintStream.INSTANCE) {
49 process(nos);
50 }
51 }
52
53 }