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    * 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.issues;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.IOException;
  import java.io.Reader;
  import java.io.StringReader;
  
  import org.apache.commons.csv.CSVFormat;
  import org.apache.commons.csv.CSVParser;
  import org.apache.commons.csv.CSVPrinter;
  import org.apache.commons.csv.CSVRecord;
  import org.junit.jupiter.api.Test;
  
  public class JiraCsv288Test {
  
      private void print(final CSVRecord csvRecord, final CSVPrinter csvPrinter) throws IOException {
          for (final String value : csvRecord) {
              csvPrinter.print(value);
          }
      }
  
      @Test
      // Before fix:
      // expected: <a,b,c,d,,f> but was: <a,b,c,d,|f>
      public void testParseWithABADelimiter() throws Exception {
          final Reader in = new StringReader("a|~|b|~|c|~|d|~||~|f");
          final StringBuilder stringBuilder = new StringBuilder();
          try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                  CSVParser parser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("|~|").get())) {
              for (final CSVRecord csvRecord : parser) {
                  print(csvRecord, csvPrinter);
                  assertEquals("a,b,c,d,,f", stringBuilder.toString());
              }
          }
      }
  
      @Test
      // Before fix:
      // expected: <a,b,c,d,,f> but was: <a,b|c,d,|f>
      public void testParseWithDoublePipeDelimiter() throws Exception {
          final Reader in = new StringReader("a||b||c||d||||f");
          final StringBuilder stringBuilder = new StringBuilder();
          try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                  CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("||").get())) {
              for (final CSVRecord csvRecord : csvParser) {
                  print(csvRecord, csvPrinter);
                  assertEquals("a,b,c,d,,f", stringBuilder.toString());
              }
          }
      }
  
      @Test
      // Regression, already passed before fix
  
      public void testParseWithDoublePipeDelimiterDoubleCharValue() throws Exception {
          final Reader in = new StringReader("a||bb||cc||dd||f");
          final StringBuilder stringBuilder = new StringBuilder();
          try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                  CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("||").get())) {
              for (final CSVRecord csvRecord : csvParser) {
                  print(csvRecord, csvPrinter);
                  assertEquals("a,bb,cc,dd,f", stringBuilder.toString());
              }
          }
      }
  
      @Test
      // Before fix:
      // expected: <a,b,c,d,,f,> but was: <a,b|c,d,|f>
      public void testParseWithDoublePipeDelimiterEndsWithDelimiter() throws Exception {
          final Reader in = new StringReader("a||b||c||d||||f||");
          final StringBuilder stringBuilder = new StringBuilder();
          try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                  CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("||").get())) {
              for (final CSVRecord csvRecord : csvParser) {
                  print(csvRecord, csvPrinter);
                  assertEquals("a,b,c,d,,f,", stringBuilder.toString());
              }
          }
     }
 
     @Test
     // Before fix:
     // expected: <a,b||c,d,,f> but was: <a,b||c,d,|f>
     public void testParseWithDoublePipeDelimiterQuoted() throws Exception {
         final Reader in = new StringReader("a||\"b||c\"||d||||f");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("||").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b||c,d,,f", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Regression, already passed before fix
     public void testParseWithSinglePipeDelimiterEndsWithDelimiter() throws Exception {
         final Reader in = new StringReader("a|b|c|d||f|");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("|").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f,", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Before fix:
     // expected: <a,b,c,d,,f> but was: <a,b|c,d,|f>
     public void testParseWithTriplePipeDelimiter() throws Exception {
         final Reader in = new StringReader("a|||b|||c|||d||||||f");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("|||").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Regression, already passed before fix
     public void testParseWithTwoCharDelimiter1() throws Exception {
         final Reader in = new StringReader("a~|b~|c~|d~|~|f");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("~|").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Regression, already passed before fix
     public void testParseWithTwoCharDelimiter2() throws Exception {
         final Reader in = new StringReader("a~|b~|c~|d~|~|f~");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("~|").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f~", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Regression, already passed before fix
     public void testParseWithTwoCharDelimiter3() throws Exception {
         final Reader in = new StringReader("a~|b~|c~|d~|~|f|");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("~|").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f|", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Regression, already passed before fix
     public void testParseWithTwoCharDelimiter4() throws Exception {
         final Reader in = new StringReader("a~|b~|c~|d~|~|f~~||g");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("~|").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f~,|g", stringBuilder.toString());
             }
         }
     }
 
     @Test
     // Before fix:
     // expected: <a,b,c,d,,f,> but was: <a,b,c,d,,f>
     public void testParseWithTwoCharDelimiterEndsWithDelimiter() throws Exception {
         final Reader in = new StringReader("a~|b~|c~|d~|~|f~|");
         final StringBuilder stringBuilder = new StringBuilder();
         try (CSVPrinter csvPrinter = new CSVPrinter(stringBuilder, CSVFormat.EXCEL);
                 CSVParser csvParser = CSVParser.parse(in, CSVFormat.Builder.create().setDelimiter("~|").get())) {
             for (final CSVRecord csvRecord : csvParser) {
                 print(csvRecord, csvPrinter);
                 assertEquals("a,b,c,d,,f,", stringBuilder.toString());
             }
         }
     }
 }