learning/katas/java/Core Transforms/Combine/BinaryCombineFn/test/org/apache/beam/learning/katas/coretransforms/combine/binarycombinefn/TaskTest.java

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 *  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
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.beam.learning.katas.coretransforms.combine.binarycombinefn;

import java.math.BigInteger;
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 final transient TestPipeline testPipeline = TestPipeline.create();

  @Test
  public void combine_binaryCombineFn() {
    Create.Values<BigInteger> values = Create.of(
        BigInteger.valueOf(10), BigInteger.valueOf(20), BigInteger.valueOf(30),
        BigInteger.valueOf(40), BigInteger.valueOf(50)
    );
    PCollection<BigInteger> numbers = testPipeline.apply(values);

    PCollection<BigInteger> results = Task.applyTransform(numbers);

    PAssert.that(results)
        .containsInAnyOrder(BigInteger.valueOf(150));

    testPipeline.run().waitUntilFinish();
  }

}