Rewrite is-proper-fraction test in Jest, covering all cases

Author: ausiejute

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

@@ -6,3 +6,31 @@ 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 when numerator is less than denominator`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+});
+
+test(`should return false when numerator is more than denominator`, () => {
+  expect(isProperFraction(3, 2)).toEqual(false);
+});
+
+test(`should return true when denominator is negative`, () => {
+  expect(isProperFraction(1, -2)).toEqual(true);
+});
+
+test(`should return true when nominator is negative`, () => {
+  expect(isProperFraction(-2, 4)).toEqual(true);
+});
+
+test(`should return true with both negatives where numerator is smaller`, () => {
+  expect(isProperFraction(-2, -4)).toEqual(true);
+});
+
+test(`should return false with both negatives where numerator is bigger`, () => {
+  expect(isProperFraction(-3, -2)).toEqual(false);
+});
+
+test(`should return false with equal values`, () => {
+  expect(isProperFraction(2, 2)).toEqual(false);
+});