added tests for improper fractions, negative proper fractions, and equal numerator and denominator cases in isProperFraction function

Author: alexandru-pocovnicu

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

@@ -7,7 +7,16 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for improper fraction",()=>{
+  expect(isProperFraction(3,2)).toEqual(false)
+})
 
 // Case 3: Identify Negative Fractions:
+test("should return true for negative proper fraction",()=>{
+  expect(isProperFraction(-2,7)).toEqual(true)
+})
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for equal nominator and denominator",()=>{
+  expect(isProperFraction(2,2)).toEqual(false)
+})