Complete Jest test suite for isProperFraction

Author: Niangh-Ciang

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

@@ -8,3 +8,25 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+test(`should return false when denominator is smaller`, () => {
+  expect(isProperFraction(4, 2)).toEqual(false);
+});
+test("should return true when numerator < denominator and both positive", () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+  expect(isProperFraction(3, 5)).toEqual(true);
+});
+test("should return false when numerator is negative", () => {
+  expect(isProperFraction(-2, 5)).toEqual(false);
+});
+test("should return false when denominator is negative", () => {
+  expect(isProperFraction(2, -5)).toEqual(false);
+});
+test("should return false when numerator is greater than denominator", () => {
+  expect(isProperFraction(4, 2)).toEqual(false);
+});
+test("should return false when numerator is zero", () => {
+  expect(isProperFraction(0, 5)).toEqual(false);
+});
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(4, 4)).toEqual(false);
+});