public static IEnumerable <object[]> IntIntervalData()
 {
     for (int i = 0; i < 100; i++)
     {
         var n  = Generators.GetRandomIntValue();
         var n1 = Generators.GetRandomIntValue();
         if (n < n1)
         {
             yield return new object[] { n, n1 }
         }
         ;
         else
         {
             yield return new object[] { n1, n }
         };
     }
 }