[
  {
    "description": "countArgs is defined and are functions",
    "code": "equal(typeof countArgs, 'function')"
  },
  {
    "description": "countArgs returns the right results for 2 arguments",
    "code": "equal(countArgs(1, 1), 2)"
  },
  {
    "description": "countArgs returns the right results for 3 arguments",
    "code": "equal(countArgs(1, 2, 3), 3)"
  },
  {
    "description": "countArgs returns the right results for 4 arguments",
    "code": "equal(countArgs(2, 2, 4, 10), 4)"
  },
  {
    "description": "countArgs returns the right results for 6 arguments",
    "code": "equal(countArgs(2, 3, 3, 5, 5, 10), 6)"
  },
  {
    "description": "countArgs can count a lot of arguments",
    "code": "equal(countArgs(...Array(999).fill()), 999)"
  }
]