nanomath/src/__test__/numbers.spec.js

import assert from 'assert'
import math from '../numbers.js'

describe('the numbers-only bundle', () => {
   it('works like regular on number-only functions', () => {
      assert.strictEqual(math.quotient(5, 3), 1)
      assert.strictEqual(math.square(-3), 9)
   })
   it('uses 1 and 0 instead of true and false', () => {
      assert.strictEqual(math.isnan(-16.5), 0)
      assert.strictEqual(math.isnan(NaN), 1)
   })
})