Add Jest tests for ProperFraction

Author: arunkumarakilan

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

@@ -27,7 +27,7 @@ function isProperFraction(numerator, denominator) {
 
 // The line below allows us to load the isProperFraction function into tests in other files.
 // This will be useful in the "rewrite tests with jest" step.
-//module.exports = isProperFraction;
+module.exports = isProperFraction;
 
 // Here's our helper again
 function assertEquals(actualOutput, targetOutput) {
@@ -45,7 +45,7 @@ assertEquals(isProperFraction(1, 2), true);
 assertEquals(isProperFraction(5, 4), false);
 assertEquals(isProperFraction(3, 3), false);
 assertEquals(isProperFraction(0, 5), true);
-assertEquals(isProperFraction(3, 0), false);
+assertEquals(isProperFraction(1, 0), false);
 assertEquals(isProperFraction(-3, 2), true);
 assertEquals(isProperFraction(2, -5), false);
 assertEquals(isProperFraction(-2, -3), false);

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

@@ -8,3 +8,24 @@ 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 true when numerator is zero`, ()=>{
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+test(`should return true when denominator is greater than numerator`, () =>{
+expect(isProperFraction(1, 2)).toEqual(true);
+});
+test(`should return false when numerator is greater than denominator`, ()=> {
+  expect(isProperFraction(5, 4)).toEqual(false);
+});
+test(`should return false when numerator is equals to denominator`, ()=>{
+expect(isProperFraction(3, 3)).toEqual(false);
+});
+test(`should return true when denominator is greater than negative numerator`, ()=>{
+  expect(isProperFraction(-3, 2)).toEqual(true);
+});
+test(`should return false when numerator is greater than denominator`, ()=> {
+  expect(isProperFraction(2, -5)).toEqual(false);
+});
+test(`should return false when negative numerator is greater than negative denominator`, ()=> {
+  expect(isProperFraction(-2, -3)).toEqual(false);
+});