Add more test cases

testing/resources/jupyter_case_2.ipynb

@@ -0,0 +1,159 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "1a4e6df0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from typing import List, Dict"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "d72a909f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def some_function(arg1: List[str], arg2: Dict[str, float]):\n",
+    "    print(arg1)\n",
+    "    return arg2"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0040a4f4",
+   "metadata": {},
+   "source": [
+    "## Section 1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "3a1b985c",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['a', 'b']\n"
+     ]
+    }
+   ],
+   "source": [
+    "a = some_function(['a', 'b'], {'c': 0.2})"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "2dfd7d0b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "assert 3 == 3"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "de5a89c9",
+   "metadata": {},
+   "source": [
+    "Here is a math formulas:\n",
+    "\n",
+    "$$c = \\sqrt{a^2 + b^2}$$"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "4952b6de",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def some_other_function() -> bool:\n",
+    "    \"\"\"\n",
+    "    Some docstring\n",
+    "    \"\"\"\n",
+    "    return False"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "bf1cb851",
+   "metadata": {},
+   "source": [
+    "There can be double quotes in non-code cells, like this: \"this\". These should not be changed to single quotes."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "01224536",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "False\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(some_other_function())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b54d0660",
+   "metadata": {},
+   "source": [
+    "There can also be double quotes in the cell output. Again, they should not be changed to single quotes."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "dc0edb11",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "abcd\"efg\".\n"
+     ]
+    }
+   ],
+   "source": [
+    "print('abcd\"efg\".')"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "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": "3.9.13"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

tests/string_fixer_for_jupyter_notebooks_test.py

@@ -1,16 +1,25 @@
+import pytest
+
 from pre_commit_hooks.string_fixer_for_jupyter_notebooks import main
 from testing.util import get_resource_path
 
 
-def test_rewrite(tmpdir):
-    with open(get_resource_path('before.ipynb')) as f:
+TESTS = (
+    ('jupyter_case_1_before.ipynb', 'jupyter_case_1_after.ipynb', 1),
+    # the file in Case 2 is not altered, so we reload the same file
+    ('jupyter_case_2.ipynb', 'jupyter_case_2.ipynb', 0),
+)
+
+@pytest.mark.parametrize(('input_file', 'output_file', 'expected_retv'), TESTS)
+def test_rewrite(input_file, output_file, expected_retv, tmpdir):
+    with open(get_resource_path(input_file)) as f:
         before_contents = f.read()
 
-    with open(get_resource_path('after.ipynb')) as f:
+    with open(get_resource_path(output_file)) as f:
         after_contents = f.read()
 
     path = tmpdir.join('file.ipynb')
     path.write(before_contents)
     retval = main([str(path)])
     assert path.read() == after_contents
-    assert retval == 1
+    assert retval == expected_retv