tests to include negative numerator and denominator cases

Author: fayaz551

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

@@ -17,12 +17,16 @@ test("should return true when numerator is zero and denominator is negative", ()
 test("should return true when numerator is less than denominator", () => {
   expect(isProperFraction(1, 2)).toBe(true);
   expect(isProperFraction(3, 5)).toBe(true);
+  expect(isProperFraction(-1, 2)).toBe(true);
+  expect(isProperFraction(1, -2)).toBe(true);
 });
 
 // Category 3: Improper fractions (numerator >= denominator)
 test("should return false when numerator is greater than or equal to denominator", () => {
   expect(isProperFraction(2, 1)).toBe(false);
   expect(isProperFraction(5, 5)).toBe(false);
+  expect(isProperFraction(-3, 2)).toBe(false);
+  expect(isProperFraction(3, -2)).toBe(false);
 });
 
 // Category 4: Denominator is zero