implement isproperfraction function and rewrite tests to cover all cases

Author: djebsoft

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

@@ -12,6 +12,10 @@
 
 function isProperFraction(numerator, denominator) {
   // TODO: Implement this function
+  if (Math.abs(numerator) < Math.abs(denominator)) {
+    return true;
+  } else {
+    return false;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +35,15 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+// Example: 2/1 is not a proper fraction
+assertEquals(isProperFraction(2, 1), false);
+// Example: 1/2 is a proper fraction
+assertEquals(isProperFraction(-1, 2), true);
+// Example: -1/2 is a proper fraction
+assertEquals(isProperFraction(-1, -2), true);
+// Example: 1/2 is a proper fraction
+assertEquals(isProperFraction(1, -2), true);
+// Example: -2/1 is not a proper fraction
+assertEquals(isProperFraction(-2, 1), false);
+// Example: 1/2 is not a proper fraction
+assertEquals(isProperFraction(-2, -1), false);