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   "metadata": {},
   "source": [
    "This notebook was prepared by [Donne Martin](https://github.com/donnemartin). Source and license info is on [GitHub](https://github.com/donnemartin/interactive-coding-challenges)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Challenge Notebook"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Problem: Implement Fizz Buzz.\n",
    "\n",
    "* [Constraints](#Constraints)\n",
    "* [Test Cases](#Test-Cases)\n",
    "* [Algorithm](#Algorithm)\n",
    "* [Code](#Code)\n",
    "* [Unit Test](#Unit-Test)\n",
    "* [Solution Notebook](#Solution-Notebook)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Constraints\n",
    "\n",
    "* What is fizz buzz?\n",
    "    * Return the string representation of numbers from 1 to n\n",
    "        * Multiples of 3 -> 'Fizz'\n",
    "        * Multiples of 5 -> 'Buzz'\n",
    "        * Multiples of 3 and 5 -> 'FizzBuzz'\n",
    "* Can we assume the inputs are valid?\n",
    "    * No\n",
    "* Can we assume this fits memory?\n",
    "    * Yes"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Test Cases\n",
    "\n",
    "<pre>\n",
    "* None -> Exception\n",
    "* < 1 -> Exception\n",
    "* 15 ->\n",
    "[\n",
    "    '1',\n",
    "    '2',\n",
    "    'Fizz',\n",
    "    '4',\n",
    "    'Buzz',\n",
    "    'Fizz',\n",
    "    '7',\n",
    "    '8',\n",
    "    'Fizz',\n",
    "    'Buzz',\n",
    "    '11',\n",
    "    'Fizz',\n",
    "    '13',\n",
    "    '14',\n",
    "    'FizzBuzz'\n",
    "]\n",
    "</pre>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Algorithm\n",
    "\n",
    "Refer to the [Solution Notebook](http://nbviewer.ipython.org/github/donnemartin/interactive-coding-challenges/blob/master/arrays_strings/fizz_buzz/fizz_buzz_solution.ipynb).  If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Code"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Solution(object):\n",
    "\n",
    "    def fizz_buzz(self, num):\n",
    "        # TODO: Implement me\n",
    "        pass"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Unit Test"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**The following unit test is expected to fail until you solve the challenge.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# %load test_fizz_buzz.py\n",
    "import unittest\n",
    "\n",
    "\n",
    "class TestFizzBuzz(unittest.TestCase):\n",
    "\n",
    "    def test_fizz_buzz(self):\n",
    "        solution = Solution()\n",
    "        self.assertRaises(TypeError, solution.fizz_buzz, None)\n",
    "        self.assertRaises(ValueError, solution.fizz_buzz, 0)\n",
    "        expected = [\n",
    "            '1',\n",
    "            '2',\n",
    "            'Fizz',\n",
    "            '4',\n",
    "            'Buzz',\n",
    "            'Fizz',\n",
    "            '7',\n",
    "            '8',\n",
    "            'Fizz',\n",
    "            'Buzz',\n",
    "            '11',\n",
    "            'Fizz',\n",
    "            '13',\n",
    "            '14',\n",
    "            'FizzBuzz'\n",
    "        ]\n",
    "        self.assertEqual(solution.fizz_buzz(15), expected)\n",
    "        print('Success: test_fizz_buzz')\n",
    "\n",
    "\n",
    "def main():\n",
    "    test = TestFizzBuzz()\n",
    "    test.test_fizz_buzz()\n",
    "\n",
    "\n",
    "if __name__ == '__main__':\n",
    "    main()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Solution Notebook\n",
    "\n",
    "Review the [Solution Notebook](http://nbviewer.ipython.org/github/donnemartin/interactive-coding-challenges/blob/master/arrays_strings/fizz_buzz/fizz_buzz_solution.ipynb) for a discussion on algorithms and code solutions."
   ]
  }
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