code: @Test public void testFileIsCompressed() throws IOException, InterruptedException {
    ContentEncodingHttpClient client=new ContentEncodingHttpClient();
    String fileName="hello.html";
    File f=new File(tmpDir,fileName);
    writeFile(f,"hello world");
    try {
      for (int i=0; i < 3; ++i) {
        HttpGet get=new HttpGet(DefaultServer.getDefaultServerURL() + "/" + fileName);
        HttpResponse result=client.execute(get);
        Assert.assertEquals(200,result.getStatusLine().getStatusCode());
        String response=HttpClientUtils.readResponse(result);
        Assert.assertEquals("hello world",response);
        Assert.assertEquals("deflate",result.getHeaders(Headers.CONTENT_ENCODING_STRING)[0].getValue());
      }
      writeFile(f,"modified file");
      HttpGet get=new HttpGet(DefaultServer.getDefaultServerURL() + "/" + fileName);
      HttpResponse result=client.execute(get);
      Assert.assertEquals(200,result.getStatusLine().getStatusCode());
      String response=HttpClientUtils.readResponse(result);
      Assert.assertEquals("hello world",response);
      Assert.assertEquals("deflate",result.getHeaders(Headers.CONTENT_ENCODING_STRING)[0].getValue());
    }
    finally {
      client.getConnectionManager().shutdown();
    }
  }
  