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   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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
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   *
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  package org.apache.beam.sdk.extensions.avro;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  
  import org.apache.avro.SchemaBuilder;
  import org.apache.beam.model.pipeline.v1.RunnerApi;
  import org.apache.beam.model.pipeline.v1.RunnerApi.Components;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.extensions.avro.coders.AvroCoder;
  import org.apache.beam.sdk.util.construction.CoderTranslation;
  import org.apache.beam.sdk.util.construction.Environments;
  import org.apache.beam.sdk.util.construction.RehydratedComponents;
  import org.apache.beam.sdk.util.construction.SdkComponents;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link AvroCoder} translation. */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
  })
  @RunWith(JUnit4.class)
  public class AvroCoderTranslationTest {
    /** Tests round-trip coder encodings for both known and unknown {@link Coder coders}. */
    @Test
    public void toAndFromProto() throws Exception {
      Coder<?> coder = AvroCoder.of(SchemaBuilder.record("record").fields().endRecord());
      SdkComponents sdkComponents = SdkComponents.create();
      sdkComponents.registerEnvironment(Environments.createDockerEnvironment("java"));
      RunnerApi.Coder coderProto = CoderTranslation.toProto(coder, sdkComponents);
  
      Components encodedComponents = sdkComponents.toComponents();
      Coder<?> decodedCoder =
          CoderTranslation.fromProto(
              coderProto,
              RehydratedComponents.forComponents(encodedComponents),
              CoderTranslation.TranslationContext.DEFAULT);
      assertThat(decodedCoder, equalTo(coder));
    }
  }
  