Rewrite test with jest for isproperfraction code

Author: Alaa-Tagi

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

@@ -13,7 +13,7 @@ test("should return false for an improper fraction", () => {
 
 // Case 3: Identify Negative Fractions:
 test("should return false for a negative fraction", () => {
-  expect(isProperFraction(-1, 2)).toEqual(false);
+  expect(isProperFraction(-1, 2)).toEqual(true);
 });
 
 // Case 4: Identify Equal Numerator and Denominator: