/*
    * Copyright (C) 2012 The Guava Authors
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.common.io;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import com.google.common.collect.ImmutableSet;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Random;
  
  /**
   * A byte source for testing that has configurable behavior.
   *
   * @author Colin Decker
   */
  public final class TestByteSource extends ByteSource implements TestStreamSupplier {
  
    private final byte[] bytes;
    private final ImmutableSet<TestOption> options;
  
    private boolean inputStreamOpened;
    private boolean inputStreamClosed;
  
    TestByteSource(byte[] bytes, TestOption... options) {
      this.bytes = checkNotNull(bytes);
      this.options = ImmutableSet.copyOf(options);
    }
  
    @Override
    public boolean wasStreamOpened() {
      return inputStreamOpened;
    }
  
    @Override
    public boolean wasStreamClosed() {
      return inputStreamClosed;
    }
  
    @Override
    public InputStream openStream() throws IOException {
      inputStreamOpened = true;
      return new RandomAmountInputStream(new In(), new Random());
    }
  
    private final class In extends TestInputStream {
  
      public In() throws IOException {
        super(new ByteArrayInputStream(bytes), options);
      }
  
      @Override
      public void close() throws IOException {
        inputStreamClosed = true;
        super.close();
      }
    }
  }