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
   *
   *     https://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.trevni.avro;
  
  import java.io.File;
  import java.io.IOException;
  
  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.avro.io.DatumWriter;
  import org.apache.trevni.ColumnFileMetaData;
  import org.apache.trevni.avro.AvroColumnReader.Params;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  
  public class TestEvolvedSchema {
    private static String writerSchema = "{" + "    \"namespace\": \"org.apache.avro\","
        + "    \"name\": \"test_evolution\"," + "    \"type\": \"record\"," + "    \"fields\": ["
        + "        { \"name\": \"a\", \"type\":\"string\" }," + "        { \"name\": \"b\", \"type\":\"int\" }" + "     ]"
        + "}";
    private static String innerSchema = "{\"name\":\"c1\"," + "          \"type\":\"record\","
        + "          \"fields\":[{\"name\":\"c11\", \"type\":\"int\", \"default\": 2},"
        + "                      {\"name\":\"c12\", \"type\":\"string\", \"default\":\"goodbye\"}]}";
    private static String evolvedSchema2 = "{" + "    \"namespace\": \"org.apache.avro\","
        + "    \"name\": \"test_evolution\"," + "    \"type\": \"record\"," + "    \"fields\": ["
        + "        { \"name\": \"a\", \"type\":\"string\" }," + "        { \"name\": \"b\", \"type\":\"int\" },"
        + "        { \"name\": \"c\", \"type\":" + innerSchema + ","
        + "          \"default\":{\"c11\": 1, \"c12\": \"hello\"}" + "        }" + "     ]" + "}";
  
    GenericData.Record writtenRecord;
    GenericData.Record evolvedRecord;
    GenericData.Record innerRecord;
  
    private static final Schema writer = new Schema.Parser().parse(writerSchema);
    private static final Schema evolved = new Schema.Parser().parse(evolvedSchema2);
    private static final Schema inner = new Schema.Parser().parse(innerSchema);
  
    @BeforeEach
    public void setUp() {
      writtenRecord = new GenericData.Record(writer);
      writtenRecord.put("a", "record");
      writtenRecord.put("b", 21);
  
      innerRecord = new GenericData.Record(inner);
      innerRecord.put("c11", 1);
      innerRecord.put("c12", "hello");
  
      evolvedRecord = new GenericData.Record(evolved);
      evolvedRecord.put("a", "record");
      evolvedRecord.put("b", 21);
      evolvedRecord.put("c", innerRecord);
    }
  
    @Test
    void trevniEvolvedRead() throws IOException {
      AvroColumnWriter<GenericRecord> acw = new AvroColumnWriter<>(writer, new ColumnFileMetaData());
      acw.write(writtenRecord);
      File serializedTrevni = File.createTempFile("trevni", null);
      acw.writeTo(serializedTrevni);
  
      AvroColumnReader.Params params = new Params(serializedTrevni);
      params.setSchema(evolved);
      try (AvroColumnReader<GenericRecord> acr = new AvroColumnReader<>(params)) {
        GenericRecord readRecord = acr.next();
        assertEquals(evolvedRecord, readRecord);
        assertFalse(acr.hasNext());
      }
    }
  
    @Test
    void avroEvolvedRead() throws IOException {
      File serializedAvro = File.createTempFile("avro", null);
      DatumWriter<GenericRecord> dw = new GenericDatumWriter<>(writer);
      DataFileWriter<GenericRecord> dfw = new DataFileWriter<>(dw);
      dfw.create(writer, serializedAvro);
      dfw.append(writtenRecord);
      dfw.flush();
      dfw.close();
  
      GenericDatumReader<GenericRecord> reader = new GenericDatumReader<>(writer);
      reader.setExpected(evolved);
      try (DataFileReader<GenericRecord> dfr = new DataFileReader<>(serializedAvro, reader)) {
        GenericRecord readRecord = dfr.next();
        assertEquals(evolvedRecord, readRecord);
        assertFalse(dfr.hasNext());
      }
    }
  
  }
  