Added a fex negative tests

Author: WizardOfMenlo

src/lib.rs

@@ -991,6 +991,11 @@ macro_rules! impl_integer_for_usize {
                 assert!((6 as $T).is_multiple_of(&(6 as $T)));
                 assert!((6 as $T).is_multiple_of(&(3 as $T)));
                 assert!((6 as $T).is_multiple_of(&(1 as $T)));
+
+
+                assert!(!(42 as $T).is_multiple_of(&(5 as $T)));
+                assert!(!(5 as $T).is_multiple_of(&(3 as $T)));
+                assert!(!(42 as $T).is_multiple_of(&(0 as $T)));
             }
 
             #[test]