+
+(deftest :nwp.1
+ (numbers-within-percentage 1. 1.1 9)
+ nil)
+
+(deftest :nwp.2
+ (numbers-within-percentage 1. 1.1 11)
+ t)
+
+(deftest :pfs.1 (prefixed-fixnum-string 0 #\A 5) "A00000")
+
+(deftest :pfs.2 (prefixed-fixnum-string 1 #\A 5) "A00001")
+
+(deftest :pfs.3 (prefixed-fixnum-string 21 #\B 3) "B021")
+
+(deftest :pis.4 (prefixed-integer-string 234134 #\C 7) "C0234134")
+