text: "use strict";
  
  /*
   * Create the `sign` function that takes one number argument
   * and return 1 if the number is positive, -1 if the number is negative
   * and 0 if the number is exactly 0
   * You must not just use `Math.sign`, make your own.
   * see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
   *
   * @notions Functions, If-Else
   */
  
  // Your code:
  const sign = (num) => {
    return num < 0 && -1;
  };
  //* Begin of tests
  const assert = require("assert");
  
  assert.strictEqual(typeof sign, "function");
  assert.strictEqual(sign.toString().includes("Math.sign"), false);
  assert.strictEqual(sign.length, 1);
  assert.notStrictEqual(sign, Math.sign);
  assert.strictEqual(sign(-2), -1);
  assert.strictEqual(sign(10), 1);
  assert.strictEqual(sign(0), 0);
  assert.strictEqual(sign(132), 1);
  // End of tests */
  