{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Using `watchdog` tricks to automatically run tests.\n",
    "\n",
    "`watchdog` contains a command line tools to define watch events using a yaml file.\n",
    "\n",
    "Use `pytest` to demonstrate the technique.\n",
    "\n",
    "    !watchmedo tricks tricks.yml"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "    commands = \"\"\"pytest\"\"\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Ignore some of the by products of the notebook."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "    print(commands)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "    tricks = \"\"\"tricks:\n",
    "    - watchdog.tricks.ShellCommandTrick:\n",
    "        patterns:\n",
    "        - \"*/*.ipynb\"\n",
    "        ignore_patterns:\n",
    "        - '*/.~*.ipynb'\n",
    "        - '*/.ipynb_checkpoints*'\n",
    "        shell_command: >\n",
    "            {}\n",
    "    \"\"\".format(commands)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Write the tricks file to disk if it doesn't exist."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "    if __name__ == '__main__':\n",
    "        from IPython import get_ipython\n",
    "        path = __import__('pathlib').Path('tricks.yml')\n",
    "        if not path.exists(): path.write_text(tricks)  "
   ]
  }
 ],
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