examples/java/src/test/java/org/apache/beam/examples/DebuggingWordCountTest.java

/*
 * 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 com.google.common.io.Files;
import java.io.File;
import java.nio.charset.StandardCharsets;
import org.apache.beam.examples.DebuggingWordCount.WordCountOptions;
import org.apache.beam.sdk.testing.TestPipeline;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Tests for {@link DebuggingWordCount}.
 */
@RunWith(JUnit4.class)
public class DebuggingWordCountTest {
  @Rule public TemporaryFolder tmpFolder = new TemporaryFolder();

  @Test
  public void testDebuggingWordCount() throws Exception {
    File inputFile = tmpFolder.newFile();
    File outputFile = tmpFolder.newFile();
    Files.write(
        "stomach secret Flourish message Flourish here Flourish",
        inputFile,
        StandardCharsets.UTF_8);
    WordCountOptions options =
        TestPipeline.testingPipelineOptions().as(WordCountOptions.class);
    options.setInputFile(inputFile.getAbsolutePath());
    options.setOutput(outputFile.getAbsolutePath());
    DebuggingWordCount.main(TestPipeline.convertToArgs(options));
  }
}