public void testSyslogOutputFormat() throws IOException {
    // set the output format.
    FlumeConfiguration conf = FlumeConfiguration.get();
    conf.set(FlumeConfiguration.COLLECTOR_OUTPUT_FORMAT, "syslog");

    // build a sink that outputs to that format.
    File f = FileUtil.mktempdir();
    SinkBuilder builder = EscapedCustomDfsSink.builder();
    EventSink snk = builder.build(new Context(), "file:///" + f.getPath() + "/sub-%{service}");
    Event e = new EventImpl("this is a test message".getBytes());
    Attributes.setString(e, "service", "foo");
    snk.open();
    snk.append(e);
    snk.close();

    ByteArrayOutputStream exWriter = new ByteArrayOutputStream();
    SyslogEntryFormat fmt = new SyslogEntryFormat();
    fmt.format(exWriter, e);
    exWriter.close();
    String expected = new String(exWriter.toByteArray());

    // check the output to make sure it is what we expected.
    File fo = new File(f.getPath() + "/sub-foo");

    FileReader fr = new FileReader(fo);
    BufferedReader br = new BufferedReader(fr);
    String read = br.readLine() + "\n";
    assertEquals(expected, read);
  }
  /**
   * Test to write few log lines, compress using gzip, write to disk, read back the compressed file
   * and verify the written lines.
   *
   * @throws IOException
   */
  public void testGzipOutputFormat() throws IOException {
    // set the output format.
    FlumeConfiguration conf = FlumeConfiguration.get();
    conf.set(FlumeConfiguration.COLLECTOR_OUTPUT_FORMAT, "syslog");
    conf.set(FlumeConfiguration.COLLECTOR_DFS_COMPRESS_GZIP, "true");

    // build a sink that outputs to that format.
    File f = FileUtil.mktempdir();
    SinkBuilder builder = EscapedCustomDfsSink.builder();
    EventSink snk = builder.build(new Context(), "file:///" + f.getPath() + "/sub-%{service}");
    Event e = new EventImpl("this is a test message".getBytes());
    Attributes.setString(e, "service", "foo");
    snk.open();
    snk.append(e);
    snk.close();

    ByteArrayOutputStream exWriter = new ByteArrayOutputStream();
    SyslogEntryFormat fmt = new SyslogEntryFormat();
    fmt.format(exWriter, e);
    exWriter.close();
    String expected = new String(exWriter.toByteArray());

    // check the output to make sure it is what we expected.
    // read the gzip file and verify the contents

    GZIPInputStream gzin = new GZIPInputStream(new FileInputStream(f.getPath() + "/sub-foo.gz"));
    byte[] buf = new byte[1];
    StringBuilder output = new StringBuilder();

    while ((gzin.read(buf)) > 0) {
      output.append(new String(buf));
    }
    assertEquals(expected, output.toString());

    assertTrue("temp folder successfully deleted", FileUtil.rmr(f));
  }
  /**
   * This tests the new failover builder that uses specs strings as arguments and instantiates them!
   *
   * @throws InterruptedException
   */
  @Test
  public void testBackoffFailoverBuilder() throws IOException, InterruptedException {
    SinkBuilder bld = BackOffFailOverSink.builder();
    EventSink snk =
        bld.build(
            new ReportTestingContext(),
            "{intervalFlakeyAppend(2) => counter(\"pri\") } ",
            "counter(\"sec\")");
    snk.open();

    Event e = new EventImpl("foo".getBytes());
    snk.append(e);
    snk.append(e);
    snk.append(e);
    snk.append(e);
    snk.append(e);

    snk.close();
    CounterSink priCnt = (CounterSink) ReportManager.get().getReportable("pri");
    CounterSink secCnt = (CounterSink) ReportManager.get().getReportable("sec");
    // these are timing based, may fail.
    Assert.assertEquals(1, priCnt.getCount());
    Assert.assertEquals(4, secCnt.getCount());
  }