{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Debuging example: make the unittests work"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# Code with bugs in...\n",
    "def textToHex(text):\n",
    "    \"\"\"This code should convert ASCII text to the unicode hex\"\"\"\n",
    "    out = []\n",
    "    for c in text:\n",
    "        out.append(ord(c))\n",
    "    return \" \".join(\"{:x}\".format(i) for i in out)\n",
    "\n",
    "def runningAverage(data,window):\n",
    "    \"\"\"Take the running average of a set of numbers, with a given window\"\"\"\n",
    "    out = [0. for i in range(len(data))]\n",
    "    for i in range(len(data)):\n",
    "        for j in range(i-window,i+window+1):\n",
    "            if( j >= 0 and j < len(data) ):\n",
    "                out[i] += data[j]\n",
    "        out[i] /= (2*window + 1)\n",
    "    return out\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Run tests in the following cell"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "FF.\n",
      "======================================================================\n",
      "FAIL: testRunningAverage (__main__.ExampleCode)\n",
      "Test the running average function with a window of one\n",
      "----------------------------------------------------------------------\n",
      "Traceback (most recent call last):\n",
      "  File \"<ipython-input-20-6281f1ca32c8>\", line 33, in testRunningAverage\n",
      "    self.assertEqual(runningAverage(data,window),rData)\n",
      "AssertionError: Lists differ: [1.1666666666666667, 2.4, 5.73... != [1.75, 2.4, 5.733333333333333,...\n",
      "\n",
      "First differing element 0:\n",
      "1.1666666666666667\n",
      "1.75\n",
      "\n",
      "- [1.1666666666666667, 2.4, 5.733333333333333, 4.8999999999999995]\n",
      "+ [1.75, 2.4, 5.733333333333333, 7.35]\n",
      "\n",
      "======================================================================\n",
      "FAIL: testTextToHex (__main__.ExampleCode)\n",
      "Test the textToHex function above\n",
      "----------------------------------------------------------------------\n",
      "Traceback (most recent call last):\n",
      "  File \"<ipython-input-20-6281f1ca32c8>\", line 14, in testTextToHex\n",
      "    self.assertEqual(textToHex(\"Hello world\"), '0x48 0x65 0x6c 0x6c 0x6f 0x20 0x77 0x6f 0x72 0x6c 0x64')\n",
      "AssertionError: '48 65 6c 6c 6f 20 77 6f 72 6c 64' != '0x48 0x65 0x6c 0x6c 0x6f 0x20 0x77 0x6f 0x72 0x6c 0x64'\n",
      "\n",
      "----------------------------------------------------------------------\n",
      "Ran 3 tests in 0.004s\n",
      "\n",
      "FAILED (failures=2)\n"
     ]
    }
   ],
   "source": [
    "# The unittest suite allows you to write tests that your code must pass\n",
    "# After every change to the code you can test to check the code still works\n",
    "import unittest \n",
    "\n",
    "class ExampleCode(unittest.TestCase):\n",
    "    \"\"\"Example of how to use unittest in Jupyter.\"\"\"\n",
    "    \n",
    "    def testTrue(self):\n",
    "        \"\"\"A simple test that should always pass\"\"\"\n",
    "        self.assertEqual('foo'.upper(), 'FOO')\n",
    "        \n",
    "    def testTextToHex(self):\n",
    "        \"\"\"Test the textToHex function above\"\"\"\n",
    "        self.assertEqual(textToHex(\"Hello world\"), '0x48 0x65 0x6c 0x6c 0x6f 0x20 0x77 0x6f 0x72 0x6c 0x64')\n",
    "    \n",
    "    def testRunningAverage(self):\n",
    "        \"\"\"Test the running average function with a window of zero\"\"\"\n",
    "        # some input data\n",
    "        data = [1.,2.5,3.7,11.]\n",
    "        # a window of one either side of the value for average\n",
    "        window = 0\n",
    "        # expected output is the same as the input \n",
    "        self.assertEqual(runningAverage(data,window),data)\n",
    "\n",
    "    def testRunningAverage(self):\n",
    "        \"\"\"Test the running average function with a window of one\"\"\"\n",
    "        # some input data\n",
    "        data = [1.,2.5,3.7,11.]\n",
    "        # a window of one either side of the value for average\n",
    "        window = 1\n",
    "        # expected output (note corrections at the ends of the array)\n",
    "        rData = [(1.+2.5)/2, (1.+2.5+3.7)/3, (2.5+3.7+11.)/3, (3.7+11.)/2]\n",
    "        self.assertEqual(runningAverage(data,window),rData)\n",
    "\n",
    "if __name__ == '__main__':\n",
    "    unittest.main(argv=['first-arg-is-ignored'], exit=False)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "ename": "ImportError",
     "evalue": "cannot import name 'fit'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mImportError\u001b[0m                               Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-1-aa034f2d1069>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;32mfrom\u001b[0m \u001b[0mscipy\u001b[0m \u001b[1;32mimport\u001b[0m \u001b[0mfit\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mImportError\u001b[0m: cannot import name 'fit'"
     ]
    }
   ],
   "source": [
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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