content: /*
   * 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.runners.spark.io;
  
  import static org.junit.Assert.assertEquals;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.util.List;
  import org.apache.avro.Schema;
  import org.apache.avro.file.DataFileReader;
  import org.apache.avro.file.DataFileWriter;
  import org.apache.avro.generic.GenericData;
  import org.apache.avro.generic.GenericDatumReader;
  import org.apache.avro.generic.GenericDatumWriter;
  import org.apache.avro.generic.GenericRecord;
  import org.apache.beam.sdk.extensions.avro.io.AvroIO;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.Lists;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.io.Resources;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  /** Avro pipeline test. */
  public class AvroPipelineTest {
  
    private File inputFile;
    private File outputFile;
  
    @Rule public final TemporaryFolder tmpDir = new TemporaryFolder();
  
    @Rule public final TestPipeline pipeline = TestPipeline.create();
  
    @Before
    public void setUp() throws IOException {
      inputFile = tmpDir.newFile("test.avro");
      outputFile = new File(tmpDir.getRoot(), "out.avro");
    }
  
    @Test
    public void testGeneric() throws Exception {
      Schema schema = new Schema.Parser().parse(Resources.getResource("person.avsc").openStream());
      GenericRecord savedRecord = new GenericData.Record(schema);
      savedRecord.put("name", "John Doe");
      savedRecord.put("age", 42);
      savedRecord.put("siblingnames", Lists.newArrayList("Jimmy", "Jane"));
      populateGenericFile(Lists.newArrayList(savedRecord), schema);
  
      PCollection<GenericRecord> input =
          pipeline.apply(AvroIO.readGenericRecords(schema).from(inputFile.getAbsolutePath()));
      input.apply(AvroIO.writeGenericRecords(schema).to(outputFile.getAbsolutePath()));
      pipeline.run();
  
      List<GenericRecord> records = readGenericFile();
      assertEquals(Lists.newArrayList(savedRecord), records);
    }
  
    private void populateGenericFile(List<GenericRecord> genericRecords, Schema schema)
        throws IOException {
      FileOutputStream outputStream = new FileOutputStream(this.inputFile);
      GenericDatumWriter<GenericRecord> genericDatumWriter = new GenericDatumWriter<>(schema);
  
      try (DataFileWriter<GenericRecord> dataFileWriter = new DataFileWriter<>(genericDatumWriter)) {
        dataFileWriter.create(schema, outputStream);
        for (GenericRecord record : genericRecords) {
          dataFileWriter.append(record);
        }
      }
      outputStream.close();
    }
  
    private List<GenericRecord> readGenericFile() throws IOException {
      List<GenericRecord> records = Lists.newArrayList();
      GenericDatumReader<GenericRecord> genericDatumReader = new GenericDatumReader<>();
      try (DataFileReader<GenericRecord> dataFileReader =
          new DataFileReader<>(new File(outputFile + "-00000-of-00001"), genericDatumReader)) {
        for (GenericRecord record : dataFileReader) {
          records.add(record);
        }
      }
      return records;
    }
  }
  