/** Test of dateSub method, of class DateUtils. */
 @Test
 public void testDateSub() {
   System.out.println("dateSub");
   int days = 1;
   String expResult = "";
   String result = SqlUtils.dateSub(days);
   //        assertEquals(expResult, result);
 }
 @Test
 public void testGetMonthTable() {
   String tableName = "user";
   String monthTableName = SqlUtils.getMonthlyTable(tableName);
   //        Assert.assertEquals("a", "user_201501", monthTableName);
 }