1/*
2 * Copyright (C) 2012 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.google.common.io;
18
19import com.google.common.collect.ImmutableSet;
20
21import java.io.ByteArrayOutputStream;
22import java.io.IOException;
23import java.io.OutputStream;
24
25/**
26 * A byte sink for testing that has configurable behavior.
27 *
28 * @author Colin Decker
29 */
30public class TestByteSink extends ByteSink implements TestStreamSupplier {
31
32  private final ByteArrayOutputStream bytes = new ByteArrayOutputStream();
33  private final ImmutableSet<TestOption> options;
34
35  private boolean outputStreamOpened;
36  private boolean outputStreamClosed;
37
38  public TestByteSink(TestOption... options) {
39    this.options = ImmutableSet.copyOf(options);
40  }
41
42  byte[] getBytes() {
43    return bytes.toByteArray();
44  }
45
46  @Override
47  public boolean wasStreamOpened() {
48    return outputStreamOpened;
49  }
50
51  @Override
52  public boolean wasStreamClosed() {
53    return outputStreamClosed;
54  }
55
56  @Override
57  public OutputStream openStream() throws IOException {
58    outputStreamOpened = true;
59    bytes.reset(); // truncate
60    return new Out();
61  }
62
63  private final class Out extends TestOutputStream {
64
65    public Out() throws IOException {
66      super(bytes, options);
67    }
68
69    @Override
70    public void close() throws IOException {
71      outputStreamClosed = true;
72      super.close();
73    }
74  }
75}
76