Module-Structuring-and-Testing-Data/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js at c156ae9855dbe274e97bf175640a507ba18a2c66 · CodeYourFuture/Module-Structuring-and-Testing-Data · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
function isProperFraction(numerator, denominator) {
  // Return non numeric numerators and denominators as false
  if (typeof numerator != "number" || typeof denominator != "number")
    return false;

  if (numerator === 0 || denominator === 0) return false;

  return Math.abs(numerator) < Math.abs(denominator);
}

module.exports = isProperFraction;

function assertEquals(actualOutput, targetOutput) {
  console.assert(
    actualOutput === targetOutput,
    `Expected ${actualOutput} to equal ${targetOutput}`
  );
}

// Positive proper fraction test
assertEquals(isProperFraction(1, 2), true);

// Improper proper fraction test
assertEquals(isProperFraction(3, 2), false);

// Negative proper fraction test
assertEquals(isProperFraction(-1, 2), true);

// Zero numerator test
assertEquals(isProperFraction(0, 2), false);