write a series of tests for isProperFraction() function

Author: XiaoQuark

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

@@ -31,3 +31,17 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+
+assertEquals(isProperFraction(9, 10), true);
+
+assertEquals(isProperFraction(0, 7), false);
+
+assertEquals(isProperFraction(5, 0), false);
+
+assertEquals(isProperFraction(3.5, 6), false);
+
+assertEquals(isProperFraction(2, 1), false);
+
+assertEquals(isProperFraction(9, 3), false);
+
+assertEquals(isProperFraction(4, 4.67), false);

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

@@ -5,6 +5,35 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 // TODO: Write tests in Jest syntax to cover all combinations of positives, negatives, zeros, and other categories.
 
 // Special case: numerator is zero
+
+test(`should return true when numerator < denominator and both are integers`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+  expect(isProperFraction(3, 9)).toEqual(true);
+  expect(isProperFraction(99, 100)).toEqual(true);
+});
+
+test(`should return false when denominator = zero`, () => {
+  expect(isProperFraction(1, 0)).toEqual(false);
+  expect(isProperFraction(5, 0)).toEqual(false);
+});
+
+test(`should return false when numerator = zero`, () => {
+  expect(isProperFraction(0, 5)).toEqual(false);
+  expect(isProperFraction(0, 7)).toEqual(false);
+});
+
+test(`should return false when numerator > denominator`, () => {
+  expect(isProperFraction(3, 2)).toEqual(false);
+  expect(isProperFraction(9, 3)).toEqual(false);
+  expect(isProperFraction(36, 7)).toEqual(false);
+});
+
+test(`should return false when either numerator or denominator or both are float numbers`, () => {
+  expect(isProperFraction(1.5, 2)).toEqual(false);
+  expect(isProperFraction(6, 7.1)).toEqual(false);
+  expect(isProperFraction(3.56, 2.4)).toEqual(false);
+});
+
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });