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.testtools;
18
19 import java.io.IOException;
20 import java.io.OutputStream;
21
22 import junit.framework.AssertionFailedError;
23
24 import org.apache.commons.io.output.ProxyOutputStream;
25
26 /**
27 * Helper class for checking behaviour of IO classes.
28 *
29 * @author <a href="mailto:jeremias@apache.org">Jeremias Maerki</a>
30 */
31 public class YellOnFlushAndCloseOutputStream extends ProxyOutputStream {
32
33 private boolean yellForFlush;
34 private boolean yellForClose;
35
36 /**
37 * @param proxy OutputStream to delegate to.
38 * @param yellForFlush True if flush() is forbidden
39 * @param yellForClose True if close() is forbidden
40 */
41 public YellOnFlushAndCloseOutputStream(OutputStream proxy, boolean yellForFlush, boolean yellForClose) {
42 super(proxy);
43 this.yellForFlush = yellForFlush;
44 this.yellForClose = yellForClose;
45 }
46
47 /** @see java.io.OutputStream#flush() */
48 public void flush() throws IOException {
49 if (yellForFlush) {
50 throw new AssertionFailedError("flush() was called on OutputStream");
51 }
52 super.flush();
53 }
54
55 /** @see java.io.OutputStream#close() */
56 public void close() throws IOException {
57 if (yellForClose) {
58 throw new AssertionFailedError("close() was called on OutputStream");
59 }
60 super.close();
61 }
62
63 public void off() {
64 yellForFlush = false;
65 yellForClose = false;
66 }
67
68 }