Add test for Github issue 130

Makefile

@@ -124,3 +124,10 @@ clean: clean_venv ## Clean build dist and egg directories left after install
 	rm -f ./man/*
 	find . -type f -iname '*.pyc' -delete
 	find . -type d -name '__pycache__' -empty -delete
+
+
+# Testing
+#
+gh130: venv
+	source $(VENV_DIR)/bin/activate && \
+		python -m unittest -k '*github_issue_130' tests/test_unit/test_reader.py

setup.py

@@ -48,6 +48,7 @@
     # "pythonfuzz",
     "pytest>=2.6",
     "termcolor",
+    "mypy",
 ]
 
 # What packages are optional?

tests/test_unit/test_reader.py

@@ -7,8 +7,12 @@
 
 """
 
+import csv
+import json
 import unittest
 
+from io import StringIO
+
 from typing import Any
 from typing import Iterable
 from typing import Iterator
@@ -172,6 +176,47 @@ def test_no_delim(self) -> None:
             quotechar='"',
         )
 
+    def test_github_issue_130(self) -> None:
+        # fmt: off
+        data = """sku,features,attributes
+22221,"[{""key"":""heel_height"",""value"":""Ulttra High (4\\""+)""}]","11,room"
+"""
+        # fmt: on
+
+        # NOTE we set the escapechar to None to correctly carry over the `\`
+        # escape character
+        rows_csv = list(
+            csv.reader(
+                StringIO(data), delimiter=",", quotechar='"', escapechar=None
+            )
+        )
+        expected = [
+            [
+                "sku",
+                "features",
+                "attributes",
+            ],
+            [
+                "22221",
+                '[{"key":"heel_height","value":"Ulttra High (4\\"+)"}]',
+                "11,room",
+            ],
+        ]
+        self.assertSequenceEqual(expected, rows_csv)
+
+        rows_clevercsv = list(
+            clevercsv.reader(
+                StringIO(data), delimiter=",", quotechar='"', escapechar=""
+            )
+        )
+        self.assertSequenceEqual(expected, rows_clevercsv)
+
+        # Ensure we can parse the JSON as intended.
+        cell = json.loads(expected[1][1])
+        self.assertEqual(
+            cell, [{"key": "heel_height", "value": 'Ulttra High (4"+)'}]
+        )
+
 
 if __name__ == "__main__":
     unittest.main()