/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.beam.examples;

import org.apache.beam.examples.WordCount.WordCountOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.testing.FileChecksumMatcher;
import org.apache.beam.sdk.testing.TestPipeline;
import org.apache.beam.sdk.testing.TestPipelineOptions;
import org.apache.beam.sdk.util.IOChannelUtils;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

import java.util.Date;

/**
 * End-to-end tests of WordCount.
 */
@RunWith(JUnit4.class)
public class WordCountIT {

  /**
   * Options for the WordCount Integration Test.
   */
  public interface WordCountITOptions extends TestPipelineOptions, WordCountOptions {
  }

  @Test
  public void testE2EWordCount() throws Exception {
    PipelineOptionsFactory.register(WordCountITOptions.class);
    WordCountITOptions options = TestPipeline.testingPipelineOptions().as(WordCountITOptions.class);

    options.setOutput(IOChannelUtils.resolve(
        options.getTempRoot(),
        String.format("WordCountIT-%tF-%<tH-%<tM-%<tS-%<tL", new Date()),
        "output",
        "results"));
    options.setOnSuccessMatcher(
        new FileChecksumMatcher("c04722202dee29c442b55ead54c6000693e85e77",
            options.getOutput() + "*"));

    WordCount.main(TestPipeline.convertToArgs(options));
  }
}

@@ -887,32 +887,76 @@
 rdCountOptions;%0A
+import org.apache.beam.sdk.options.Default;%0A
 import org.apach
@@ -1478,95 +1478,339 @@
    *
-/%0A  public interface WordCountITOptions extends TestPipelineOptions, WordCountOptions %7B
+%0A   * Define expected output file checksum to verify WordCount pipeline result with customized input.%0A   */%0A  public interface WordCountITOptions extends TestPipelineOptions, WordCountOptions %7B%0A    @Default.String(%22c04722202dee29c442b55ead54c6000693e85e77%22)%0A    String getOutputChecksum();%0A    void setOutputChecksum(String value);
 %0A  %7D
@@ -2295,63 +2295,36 @@
 her(
-%22c04722202dee29c442b55ead54c6000693e85e77%22,%0A           
+options.getOutputChecksum(),
  opt

Add output checksum to WordCountITOptions