Add test to handle negative numbers

Added a test case to check for proper fraction with positive numbers.

Author: bodoszidi

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js

@@ -16,9 +16,11 @@ test(`should return true when denominator is smaller or equal to the numerator`,
 });
 
 test(`should return false when denominator is bigger than the numerator`, () => {
+  expect(isProperFraction(12, 4)).toEqual(false);
+});
+
+test("should return false when the numerator or denominator is not a positive number", () => {
   expect(isProperFraction(5, -2)).toEqual(false);
   expect(isProperFraction(-1, 0)).toEqual(false);
-  expect(isProperFraction(12, 4)).toEqual(false);
-  
 });
-  
+