### Question:
ParameterUtils { public static String handleEscapes(String inputString) { if (StringUtils.isNotEmpty(inputString)) { return inputString.replace("%", " } return inputString; } private  ParameterUtils(); static String convertParameterPlaceholders(String parameterString, Map<String, String> parameterMap); static String convertParameterPlaceholders2(String parameterString, Map<String, String> parameterMap); static void setInParameter(int index, PreparedStatement stmt, DataType dataType, String value); static String curingGlobalParams(Map<String, String> globalParamMap, List<Property> globalParamList,
                                            CommandType commandType, Date scheduleTime); static String handleEscapes(String inputString); static String replaceScheduleTime(String text, Date scheduleTime); static Map<String, String> convert(Map<String, Property> paramsMap);  }### Answer:
@Test public void testHandleEscapes() throws Exception { Assert.assertNull(ParameterUtils.handleEscapes(null)); Assert.assertEquals("",ParameterUtils.handleEscapes("")); Assert.assertEquals("test Parameter",ParameterUtils.handleEscapes("test Parameter")); Assert.assertEquals(" }