/*
    * 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.commons.csv;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.Reader;
  import java.nio.charset.StandardCharsets;
  
  import org.junit.jupiter.api.Test;
  
  class JiraCsv196Test {
  
      private Reader getTestInput(final String path) {
          return new InputStreamReader(ClassLoader.getSystemClassLoader().getResourceAsStream(path));
      }
  
      @Test
      void testParseFourBytes() throws IOException {
          final CSVFormat format = CSVFormat.Builder.create().setDelimiter(',').setQuote('\'').get();
          // @formatter:off
          try (@SuppressWarnings("resource") // parser closes the reader.
              CSVParser parser = new CSVParser.Builder()
                  .setFormat(format)
                  .setReader(getTestInput("org/apache/commons/csv/CSV-196/emoji.csv"))
                  .setCharset(StandardCharsets.UTF_8)
                  .setTrackBytes(true)
                  .get()) {
              // @formatter:on
              final long[] charByteKey = { 0, 84, 701, 1318, 1935 };
              int idx = 0;
              for (final CSVRecord record : parser) {
                  assertEquals(charByteKey[idx++], record.getBytePosition(), "At index " + idx);
              }
          }
      }
  
      @Test
      void testParseThreeBytes() throws IOException {
          final CSVFormat format = CSVFormat.Builder.create().setDelimiter(',').setQuote('\'').get();
          // @formatter:off
          try (@SuppressWarnings("resource") // parser closes the reader.
              CSVParser parser = new CSVParser.Builder()
                  .setFormat(format)
                  .setReader(getTestInput("org/apache/commons/csv/CSV-196/japanese.csv"))
                  .setCharset(StandardCharsets.UTF_8)
                  .setTrackBytes(true)
                  .get()) {
              // @formatter:on
              final long[] charByteKey = { 0, 89, 242, 395 };
              int idx = 0;
              for (final CSVRecord record : parser) {
                  assertEquals(charByteKey[idx++], record.getBytePosition(), "At index " + idx);
              }
          }
      }
  }