### Question:
CsvBulkImportUtil { @VisibleForTesting static Character getCharacter(Configuration conf, String confKey) { String strValue = conf.get(confKey); if (strValue == null) { return null; } return new String(Base64.getDecoder().decode(strValue)).charAt(0); }  static void initCsvImportJob(Configuration conf, char fieldDelimiter, char quoteChar,
            char escapeChar, String arrayDelimiter, String binaryEncoding); static void configurePreUpsertProcessor(Configuration conf,
            Class<? extends ImportPreUpsertKeyValueProcessor> processorClass); static Path getOutputPath(Path outputdir, String tableName);  }### Answer:
@Test public void testGetChar_NotPresent() { Configuration conf = new Configuration(); assertNull(CsvBulkImportUtil.getCharacter(conf, "conf.key")); }