Add proper fraction tests

Author: fatimarouchi

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

@@ -6,3 +6,30 @@ import { isProperFraction } from "../implement/2-is-proper-fraction.js";
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+test("should return true for a proper fraction", () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+});
+
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(5, 5)).toEqual(false);
+});
+
+test("should return false when numerator is greater than denominator", () => {
+  expect(isProperFraction(7, 3)).toEqual(false);
+});
+
+test("should return true when numerator is zero", () => {
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+
+test("should return false for negative numerator and denominator", () => {
+  expect(isProperFraction(-1, -2)).toEqual(false);
+});
+
+test("should return true for negative numerator and positive denominator", () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+});
+
+test("should return false for positive numerator and negative denominator", () => {
+  expect(isProperFraction(1, -2)).toEqual(false);
+});