[GitHub] [spark] HyukjinKwon commented on a diff in pull request #42284: [SPARK-44629] Publish PySpark Test Guidelines webpage

["HyukjinKwon (via GitHub)" <gi...@apache.org>]

HyukjinKwon commented on code in PR #42284:
URL: https://github.com/apache/spark/pull/42284#discussion_r1283880241


##########
python/docs/source/getting_started/testing_pyspark.ipynb:
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@@ -0,0 +1,525 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "4ee2125b-f889-47e6-9c3d-8bd63a253683",
+   "metadata": {},
+   "source": [
+    "# Testing PySpark\n",
+    "\n",
+    "This guide is a reference for writing robust tests for PySpark code.\n",
+    "\n",
+    "To view the docs for PySpark test utils, see here. To see the code for PySpark built-in test utils, check out the Spark repository here. To see the JIRA board tickets for the PySpark test framework, see here."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0e8ee4b6-9544-45e1-8a91-e71ed8ef8b9d",
+   "metadata": {},
+   "source": [
+    "## Build a PySpark Application\n",
+    "Here is an example for how to start a PySpark application. Feel free to skip to the next section, “Testing your PySpark Application,” if you already have an application you’re ready to test.\n",
+    "\n",
+    "First, start your Spark Session."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "64e82e7c",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'4.0.0.dev0'"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import pyspark\n",
+    "pyspark.__version__"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "9af4a35b-17e8-4e45-816b-34c14c5902f7",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "Setting default log level to \"WARN\".\n",

Review Comment:
   I think you should remove this warning by setting `spark.sparkContext.setLogLevel("FATAL")` first, and remove that cell



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