learning/katas/java/Examples/Word Count/Word Count/test/TaskTest.java

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 *  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
 *
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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import org.apache.beam.sdk.testing.PAssert;
import org.apache.beam.sdk.testing.TestPipeline;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.values.PCollection;
import org.junit.Rule;
import org.junit.Test;

public class TaskTest {

  @Rule
  public TestPipeline testPipeline = TestPipeline.create();

  @Test
  public void parDo() {
    Create.Values<String> lines =
        Create.of(
            "apple orange grape banana apple banana",
            "banana orange banana papaya");

    PCollection<String> linesPColl = testPipeline.apply(lines);

    PCollection<String> results = Task.applyTransform(linesPColl);

    PAssert.that(results)
        .containsInAnyOrder(
            "apple:2",
            "banana:4",
            "grape:1",
            "orange:2",
            "papaya:1"
        );

    testPipeline.run().waitUntilFinish();
  }

}