Rewrite parse_date util to not rely on strptime

hass_nabucasa/utils.py

@@ -7,8 +7,9 @@
 import ssl
 from typing import Awaitable, Callable, TypeVar
 
+import ciso8601
+
 CALLABLE_T = TypeVar("CALLABLE_T", bound=Callable)  # noqa pylint: disable=invalid-name
-DATE_STR_FORMAT = "%Y-%m-%d"
 UTC = dt.timezone.utc
 
 
@@ -25,7 +26,7 @@ def utc_from_timestamp(timestamp: float) -> dt.datetime:
 def parse_date(dt_str: str) -> dt.date | None:
     """Convert a date string to a date object."""
     try:
-        return dt.datetime.strptime(dt_str, DATE_STR_FORMAT).date()
+        return ciso8601.parse_datetime(dt_str).date()
     except ValueError:  # If dt_str did not match our format
         return None
 

pylintrc

@@ -17,6 +17,7 @@ ignore=tests_*
 good-names=id,i,j,k,ex,Run,_,fp,T,cb
 
 generated-members=botocore.errorfactory
+extension-pkg-whitelist=ciso8601
 
 disable=
   abstract-method,

setup.py

@@ -32,6 +32,7 @@
     install_requires=[
         "pycognito==2023.5.0",
         "snitun==0.36.2",
+        "ciso8601>=2.3.0",
         "acme==2.7.1",
         "cryptography>=2.8",
         "attrs>=19.3",

tests/test_utils.py

@@ -0,0 +1,56 @@
+"""Tests for hass_nabucaa utils."""
+import pytest
+
+from hass_nabucasa import utils
+
+
+@pytest.mark.parametrize(
+    "input_str",
+    [
+        "2020-02-30",
+        "2019-02-29",
+        "2021-04-31",
+        "2023-06-31",
+        "2018-09-31",
+        "2015-11-31",
+        "2022-02-30",
+        "2020-04-31",
+        "2021-06-31",
+        "2017-09-31",
+        "2019-04-31",
+        "2023-11-31",
+        "2020-06-31",
+        "2016-02-30",
+        "2021-11-31",
+        "invalid",
+        "2023/12/12",
+    ],
+)
+def test_parse_date_with_invalid_dates(input_str):
+    """Test the parse_date util."""
+    assert utils.parse_date(input_str) is None
+
+
+@pytest.mark.parametrize(
+    "input_str",
+    [
+        "2020-02-29",
+        "2019-03-15",
+        "2021-04-30",
+        "2023-06-15",
+        "2018-09-30",
+        "2015-12-25",
+        "2022-02-28",
+        "2020-07-04",
+        "2021-08-21",
+        "2017-10-31",
+        "2019-01-01",
+        "2023-11-30",
+        "2020-05-05",
+        "2016-12-12",
+        "2021-03-14",
+    ],
+)
+def test_parse_date_with_valid_dates(input_str):
+    """Test the parse_date util."""
+    assert utils.parse_date(input_str) is not None