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.server.util;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.List;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class CsvTest {
  
      @Test
      public void testCsvMap() {
          Map<String, String> emptyMap = Csv.parseCsvMap("");
          assertEquals(Map.of(), emptyMap);
  
          String kvPairsIpV6 = "a:b:c:v,a:b:c:v";
          Map<String, String> ipv6Map = Csv.parseCsvMap(kvPairsIpV6);
          for (Map.Entry<String, String> entry : ipv6Map.entrySet()) {
              assertEquals("a:b:c", entry.getKey());
              assertEquals("v", entry.getValue());
          }
  
          String singleEntry = "key:value";
          Map<String, String> singleMap = Csv.parseCsvMap(singleEntry);
          String value = singleMap.get("key");
          assertEquals("value", value);
  
          String kvPairsIpV4 = "192.168.2.1/30:allow, 192.168.2.1/30:allow";
          Map<String, String> ipv4Map = Csv.parseCsvMap(kvPairsIpV4);
          for (Map.Entry<String, String> entry : ipv4Map.entrySet()) {
              assertEquals("192.168.2.1/30", entry.getKey());
              assertEquals("allow", entry.getValue());
          }
  
          String kvPairsSpaces = "key:value      , key:   value";
          Map<String, String> spaceMap = Csv.parseCsvMap(kvPairsSpaces);
          for (Map.Entry<String, String> entry : spaceMap.entrySet()) {
              assertEquals("key", entry.getKey());
              assertEquals("value", entry.getValue());
          }
      }
  
      @Test
      public void testCsvList() {
          List<String> emptyList = Csv.parseCsvList("");
          assertEquals(List.of(), emptyList);
  
          List<String> emptyListFromNullString = Csv.parseCsvList(null);
          assertEquals(List.of(), emptyListFromNullString);
  
          List<String> csvList = Csv.parseCsvList("a,b ,c, d,,e,");
          assertEquals(List.of("a", "b", "c", "d", "e"), csvList);
      }
  }
  