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 17 package com.google.common.io; 18 19 import com.google.common.collect.ImmutableSet; 20 import java.io.ByteArrayOutputStream; 21 import java.io.IOException; 22 import java.io.OutputStream; 23 24 /** 25 * A byte sink for testing that has configurable behavior. 26 * 27 * @author Colin Decker 28 */ 29 public class TestByteSink extends ByteSink implements TestStreamSupplier { 30 31 private final ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 32 private final ImmutableSet<TestOption> options; 33 34 private boolean outputStreamOpened; 35 private boolean outputStreamClosed; 36 TestByteSink(TestOption... options)37 public TestByteSink(TestOption... options) { 38 this.options = ImmutableSet.copyOf(options); 39 } 40 getBytes()41 byte[] getBytes() { 42 return bytes.toByteArray(); 43 } 44 45 @Override wasStreamOpened()46 public boolean wasStreamOpened() { 47 return outputStreamOpened; 48 } 49 50 @Override wasStreamClosed()51 public boolean wasStreamClosed() { 52 return outputStreamClosed; 53 } 54 55 @Override openStream()56 public OutputStream openStream() throws IOException { 57 outputStreamOpened = true; 58 bytes.reset(); // truncate 59 return new Out(); 60 } 61 62 private final class Out extends TestOutputStream { 63 Out()64 public Out() throws IOException { 65 super(bytes, options); 66 } 67 68 @Override close()69 public void close() throws IOException { 70 outputStreamClosed = true; 71 super.close(); 72 } 73 } 74 } 75