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.kafka.connect.converters;
  
  import org.apache.kafka.common.serialization.Serializer;
  import org.apache.kafka.common.utils.AppInfoParser;
  import org.apache.kafka.connect.data.Schema;
  import org.apache.kafka.connect.data.SchemaAndValue;
  import org.apache.kafka.connect.errors.DataException;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public abstract class NumberConverterTest<T extends Number> {
      private static final String TOPIC = "topic";
      private static final String HEADER_NAME = "header";
  
      private T[] samples;
      private Schema schema;
      private NumberConverter<T> converter;
      private Serializer<T> serializer;
  
      protected abstract T[] samples();
  
      protected abstract NumberConverter<T> createConverter();
  
      protected abstract Serializer<T> createSerializer();
  
      protected abstract Schema schema();
  
      @BeforeEach
      public void setup() {
          converter = createConverter();
          serializer = createSerializer();
          schema = schema();
          samples = samples();
      }
  
      @Test
      public void testConvertingSamplesToAndFromBytes() throws UnsupportedOperationException {
          for (T sample : samples) {
              byte[] expected = serializer.serialize(TOPIC, sample);
  
              // Data conversion
              assertArrayEquals(expected, converter.fromConnectData(TOPIC, schema, sample));
              SchemaAndValue data = converter.toConnectData(TOPIC, expected);
              assertEquals(schema, data.schema());
              assertEquals(sample, data.value());
  
              // Header conversion
              assertArrayEquals(expected, converter.fromConnectHeader(TOPIC, HEADER_NAME, schema, sample));
              data = converter.toConnectHeader(TOPIC, HEADER_NAME, expected);
              assertEquals(schema, data.schema());
              assertEquals(sample, data.value());
          }
      }
  
      @Test
      public void testDeserializingDataWithTooManyBytes() {
          assertThrows(DataException.class, () -> converter.toConnectData(TOPIC, new byte[10]));
      }
  
      @Test
      public void testDeserializingHeaderWithTooManyBytes() {
          assertThrows(DataException.class, () -> converter.toConnectHeader(TOPIC, HEADER_NAME, new byte[10]));
      }
  
      @Test
      public void testSerializingIncorrectType() {
          assertThrows(DataException.class, () -> converter.fromConnectData(TOPIC, schema, "not a valid number"));
      }
  
      @Test
      public void testSerializingIncorrectHeader() {
          assertThrows(DataException.class,
              () -> converter.fromConnectHeader(TOPIC, HEADER_NAME, schema, "not a valid number"));
      }
  
      @Test
      public void testNullToBytes() {
          assertNull(converter.fromConnectData(TOPIC, schema, null));
      }
  
      @Test
      public void testBytesNullToNumber() {
          SchemaAndValue data = converter.toConnectData(TOPIC, null);
          assertEquals(schema(), data.schema());
          assertNull(data.value());
      }
  
      @Test
      public void testInheritedVersionRetrievedFromAppInfoParser() {
          assertEquals(AppInfoParser.getVersion(), converter.version());
      }
  }
  