runners/spark/src/test/java/org/apache/beam/runners/spark/structuredstreaming/translation/helpers/EncoderHelpersTest.java

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 * distributed with this work for additional information
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 * 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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package org.apache.beam.runners.spark.structuredstreaming.translation.helpers;

import static org.junit.Assert.assertEquals;

import java.util.Arrays;
import java.util.List;
import org.apache.beam.runners.spark.structuredstreaming.SparkSessionRule;
import org.apache.beam.sdk.coders.VarIntCoder;
import org.apache.spark.sql.Dataset;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Test of the wrapping of Beam Coders as Spark ExpressionEncoders. */
@RunWith(JUnit4.class)
public class EncoderHelpersTest {

  @ClassRule public static SparkSessionRule sessionRule = new SparkSessionRule();

  @Test
  public void beamCoderToSparkEncoderTest() {
    List<Integer> data = Arrays.asList(1, 2, 3);
    Dataset<Integer> dataset =
        sessionRule
            .getSession()
            .createDataset(data, EncoderHelpers.fromBeamCoder(VarIntCoder.of()));
    assertEquals(data, dataset.collectAsList());
  }
}