text: 'use strict'
  
  /*
   * Create the `abs` function that takes one number argument
   * and returns its absolute value.
   * You are not allowed to use `Math.abs`, make your own.
   * see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/abs
   *
   * @notions Functions, Ternary
   */
  
  // Your code :
  
  function abs (x){
      return (x < 0) ? (x * -1) : x;
  }
  
  //* Begin of tests
  const assert = require('assert')
  
  assert.strictEqual(typeof abs, 'function')
  assert.strictEqual(abs.toString().includes('Math.abs'), false)
  assert.notStrictEqual(abs, Math.abs)
  assert.strictEqual(abs.length, 1)
  assert.strictEqual(abs(0), 0)
  assert.strictEqual(abs(-1), 1)
  assert.strictEqual(abs(-13.2), 13.2)
  assert.strictEqual(abs(132), 132)
  // End of tests */
  