/*
    * Copyright 2002-2014 the original author or 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 org.springframework.http;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.nio.charset.Charset;
  
  import static org.mockito.Mockito.*;
  
  /**
   * @author Arjen Poutsma
   */
  public class MockHttpOutputMessage implements HttpOutputMessage {
  
  	private final HttpHeaders headers = new HttpHeaders();
  
  	private final ByteArrayOutputStream body = spy(new ByteArrayOutputStream());
  
  	private boolean headersWritten = false;
  
  	@Override
  	public HttpHeaders getHeaders() {
  		return (this.headersWritten ? HttpHeaders.readOnlyHttpHeaders(this.headers) : this.headers);
  	}
  
  	@Override
  	public OutputStream getBody() throws IOException {
  		this.headersWritten = true;
  		return body;
  	}
  
  	public byte[] getBodyAsBytes() {
  		this.headersWritten = true;
  		return body.toByteArray();
  	}
  
  	public String getBodyAsString(Charset charset) {
  		byte[] bytes = getBodyAsBytes();
  		return new String(bytes, charset);
  	}
  }