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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 org.junit.Before;
20  import org.junit.Test;
21  
22  import java.io.IOException;
23  import java.io.OutputStream;
24  
25  import static org.junit.Assert.assertEquals;
26  import static org.junit.Assert.assertFalse;
27  import static org.junit.Assert.fail;
28  
29  /**
30   * JUnit Test Case for {@link CloseShieldOutputStream}.
31   */
32  public class CloseShieldOutputStreamTest {
33  
34      private ByteArrayOutputStream original;
35  
36      private OutputStream shielded;
37  
38      private boolean closed;
39  
40      @Before
41      public void setUp() {
42          original = new ByteArrayOutputStream() {
43              @Override
44              public void close() {
45                  closed = true;
46              }
47          };
48          shielded = new CloseShieldOutputStream(original);
49          closed = false;
50      }
51  
52      @Test
53      public void testClose() throws IOException {
54          shielded.close();
55          assertFalse("closed", closed);
56          try {
57              shielded.write('x');
58              fail("write(b)");
59          } catch (final IOException ignore) {
60              // expected
61          }
62          original.write('y');
63          assertEquals(1, original.size());
64          assertEquals('y', original.toByteArray()[0]);
65      }
66  
67  }