Add test_plasmapy.ipynb notebook from Peter

test_plasmapy.ipynb

@@ -0,0 +1,91 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "ea6c93d3",
+   "metadata": {},
+   "source": [
+    "# Testing the PlasmaPy Installation"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "addbcd4e",
+   "metadata": {},
+   "source": [
+    "To run this notebook in its entirety, select \"Cell > Run All\" in the toolbar\n",
+    "\n",
+    "To run a single cell, select the cell and press \"ctrl+Enter\" or press the \"Run\" button in the toolbar.\n",
+    "\n",
+    "To run a subset of the cells, look at the options under \"Cell\" in the toolbar menu."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3c936b1a",
+   "metadata": {},
+   "source": [
+    "To test the PlasmaPy is installed correctly, we will calculate the gyrofrequency of a proton in a magnetic field using a function imported from the PlasmaPy formulary."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "fe0d92e8",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import astropy.units as u\n",
+    "from plasmapy.formulary.parameters import gyrofrequency"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "472c04d7",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Gyrofrequency: 9.58e+08 rad / s\n"
+     ]
+    }
+   ],
+   "source": [
+    "wci = gyrofrequency(10*u.T, 'H+')\n",
+    "print(f\"Gyrofrequency: {wci:.2e}\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "31c1e943",
+   "metadata": {},
+   "source": [
+    "If this code executes without errors, your PlasmaPy installation is working!"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}