added another test case (0,0)

Author: fayaz551

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

@@ -32,4 +32,10 @@ test("should return false when numerator is greater than or equal to denominator
 // Category 4: Denominator is zero
 test("should return false when denominator is zero", () => {
   expect(isProperFraction(1, 0)).toBe(false);
+});
+
+// Category 5: Both numerator and denominator are zero
+
+test("should return false when numerator is zero and denominator is zero", () => {
+  expect(isProperFraction(0, 0)).toBe(false);
 });