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.storage;
  
  import org.apache.kafka.common.utils.AppInfoParser;
  import org.apache.kafka.common.utils.Utils;
  import org.apache.kafka.connect.data.Schema;
  import org.apache.kafka.connect.data.SchemaAndValue;
  
  import org.junit.jupiter.api.Test;
  
  import java.nio.charset.StandardCharsets;
  import java.util.Collections;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class StringConverterTest {
      private static final String TOPIC = "topic";
      private static final String SAMPLE_STRING = "a string";
  
      private final StringConverter converter = new StringConverter();
  
      @Test
      public void testStringToBytes() {
          assertArrayEquals(Utils.utf8(SAMPLE_STRING), converter.fromConnectData(TOPIC, Schema.STRING_SCHEMA, SAMPLE_STRING));
      }
  
      @Test
      public void testNonStringToBytes() {
          assertArrayEquals(Utils.utf8("true"), converter.fromConnectData(TOPIC, Schema.BOOLEAN_SCHEMA, true));
      }
  
      @Test
      public void testNullToBytes() {
          assertNull(converter.fromConnectData(TOPIC, Schema.OPTIONAL_STRING_SCHEMA, null));
      }
  
      @Test
      public void testToBytesIgnoresSchema() {
          assertArrayEquals(Utils.utf8("true"), converter.fromConnectData(TOPIC, null, true));
      }
  
      @Test
      public void testToBytesNonUtf8Encoding() {
          converter.configure(Collections.singletonMap("converter.encoding", StandardCharsets.UTF_16.name()), true);
          assertArrayEquals(SAMPLE_STRING.getBytes(StandardCharsets.UTF_16), converter.fromConnectData(TOPIC, Schema.STRING_SCHEMA, SAMPLE_STRING));
      }
  
      @Test
      public void testBytesToString() {
          SchemaAndValue data = converter.toConnectData(TOPIC, SAMPLE_STRING.getBytes());
          assertEquals(Schema.OPTIONAL_STRING_SCHEMA, data.schema());
          assertEquals(SAMPLE_STRING, data.value());
      }
  
      @Test
      public void testBytesNullToString() {
          SchemaAndValue data = converter.toConnectData(TOPIC, null);
          assertEquals(Schema.OPTIONAL_STRING_SCHEMA, data.schema());
          assertNull(data.value());
      }
  
      @Test
      public void testBytesToStringNonUtf8Encoding() {
          converter.configure(Collections.singletonMap("converter.encoding", StandardCharsets.UTF_16.name()), true);
          SchemaAndValue data = converter.toConnectData(TOPIC, SAMPLE_STRING.getBytes(StandardCharsets.UTF_16));
          assertEquals(Schema.OPTIONAL_STRING_SCHEMA, data.schema());
          assertEquals(SAMPLE_STRING, data.value());
      }
  
      // Note: the header conversion methods delegates to the data conversion methods, which are tested above.
      // The following simply verify that the delegation works.
  
      @Test
      public void testStringHeaderValueToBytes() {
          assertArrayEquals(Utils.utf8(SAMPLE_STRING), converter.fromConnectHeader(TOPIC, "hdr", Schema.STRING_SCHEMA, SAMPLE_STRING));
      }
  
      @Test
      public void testNonStringHeaderValueToBytes() {
          assertArrayEquals(Utils.utf8("true"), converter.fromConnectHeader(TOPIC, "hdr", Schema.BOOLEAN_SCHEMA, true));
      }
  
      @Test
      public void testNullHeaderValueToBytes() {
          assertNull(converter.fromConnectHeader(TOPIC, "hdr", Schema.OPTIONAL_STRING_SCHEMA, null));
      }
  
      @Test
      public void testInheritedVersionRetrievedFromAppInfoParser() {
          assertEquals(AppInfoParser.getVersion(), converter.version());
      }
  }
  