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.EOFException;
  import java.io.InputStream;
  import java.io.FileInputStream;
  import java.util.List;
  import java.util.ArrayList;
  
  import org.apache.trevni.ColumnFileMetaData;
  
  import org.apache.avro.Schema;
  import org.apache.avro.io.Decoder;
  import org.apache.avro.io.DecoderFactory;
  import org.apache.avro.io.DatumReader;
  import org.apache.avro.generic.GenericDatumReader;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class TestCases {
  
    private static final File DIR = new File("src/test/cases/");
    private static final File FILE = new File("target", "case.trv");
  
    @Test
    void cases() throws Exception {
      for (File f : DIR.listFiles())
        if (f.isDirectory() && !f.getName().startsWith("."))
          runCase(f);
    }
  
    private void runCase(File dir) throws Exception {
      Schema schema = new Schema.Parser().parse(new File(dir, "input.avsc"));
      List<Object> data = fromJson(schema, new File(dir, "input.json"));
  
      // write full data
      AvroColumnWriter<Object> writer = new AvroColumnWriter<>(schema, new ColumnFileMetaData());
      for (Object datum : data)
        writer.write(datum);
      writer.writeTo(FILE);
  
      // test that the full schema reads correctly
      checkRead(schema, data);
  
      // test that sub-schemas read correctly
      for (File f : dir.listFiles())
        if (f.isDirectory() && !f.getName().startsWith(".")) {
          Schema s = new Schema.Parser().parse(new File(f, "sub.avsc"));
          checkRead(s, fromJson(s, new File(f, "sub.json")));
        }
    }
  
    private void checkRead(Schema s, List<Object> data) throws Exception {
      try (AvroColumnReader<Object> reader = new AvroColumnReader<>(new AvroColumnReader.Params(FILE).setSchema(s))) {
        for (Object datum : data)
          assertEquals(datum, reader.next());
      }
    }
  
    private List<Object> fromJson(Schema schema, File file) throws Exception {
      List<Object> data = new ArrayList<>();
      try (InputStream in = new FileInputStream(file)) {
        DatumReader reader = new GenericDatumReader(schema);
        Decoder decoder = DecoderFactory.get().jsonDecoder(schema, in);
        while (true)
          data.add(reader.read(null, decoder));
      } catch (EOFException e) {
      }
      return data;
    }
  
  }
  