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 static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.common.collect.ImmutableSet; 22 23 import java.io.ByteArrayInputStream; 24 import java.io.IOException; 25 import java.io.InputStream; 26 import java.util.Random; 27 28 /** 29 * A byte source for testing that has configurable behavior. 30 * 31 * @author Colin Decker 32 */ 33 public final class TestByteSource extends ByteSource implements TestStreamSupplier { 34 35 private final byte[] bytes; 36 private final ImmutableSet<TestOption> options; 37 38 private boolean inputStreamOpened; 39 private boolean inputStreamClosed; 40 TestByteSource(byte[] bytes, TestOption... options)41 TestByteSource(byte[] bytes, TestOption... options) { 42 this.bytes = checkNotNull(bytes); 43 this.options = ImmutableSet.copyOf(options); 44 } 45 46 @Override wasStreamOpened()47 public boolean wasStreamOpened() { 48 return inputStreamOpened; 49 } 50 51 @Override wasStreamClosed()52 public boolean wasStreamClosed() { 53 return inputStreamClosed; 54 } 55 56 @Override openStream()57 public InputStream openStream() throws IOException { 58 inputStreamOpened = true; 59 return new RandomAmountInputStream(new In(), new Random()); 60 } 61 62 private final class In extends TestInputStream { 63 In()64 public In() throws IOException { 65 super(new ByteArrayInputStream(bytes), options); 66 } 67 68 @Override close()69 public void close() throws IOException { 70 inputStreamClosed = true; 71 super.close(); 72 } 73 } 74 } 75