From: Christian Heller <c.heller@plomlompom.de>
Date: Sun, 17 Mar 2024 01:00:33 +0000 (+0100)
Subject: Add date validation for Days.
X-Git-Url: https://plomlompom.com/repos/%7B%7Bdb.prefix%7D%7D/%7B%7B%20web_path%20%7D%7D/decks/bar%20baz.html?a=commitdiff_plain;h=96b8f35df2ed6f7db0c7c8ffa8234e2925e8756c;p=plomtask

Add date validation for Days.
---

diff --git a/plomtask/days.py b/plomtask/days.py
index 071b0b1..4e0c474 100644
--- a/plomtask/days.py
+++ b/plomtask/days.py
@@ -1,15 +1,27 @@
 """Collecting Day and date-related items."""
 from datetime import datetime
+from plomtask.misc import HandledException
 
 DATE_FORMAT = '%Y-%m-%d'
 
 
+def date_valid(date: str):
+    """Validate date against DATE_FORMAT, return Datetime or None."""
+    try:
+        result = datetime.strptime(date, DATE_FORMAT)
+    except (ValueError, TypeError):
+        return None
+    return result
+
+
 class Day:
     """Individual days defined by their dates."""
 
     def __init__(self, date: str):
         self.date = date
-        self.datetime = datetime.strptime(date, DATE_FORMAT)
+        self.datetime = date_valid(self.date)
+        if not self.datetime:
+            raise HandledException(f'Given date of wrong format: {self.date}')
 
     @property
     def weekday(self):
diff --git a/tests/test_days.py b/tests/test_days.py
index c799f06..ba627e9 100644
--- a/tests/test_days.py
+++ b/tests/test_days.py
@@ -1,11 +1,20 @@
 """Test days module."""
 from unittest import TestCase
 from plomtask.days import Day
+from plomtask.misc import HandledException
 
 
 class DayTests(TestCase):
     """Tests for testing the days module."""
 
+    def test_Day_dates(self):
+        """Test Day's date format.."""
+        with self.assertRaises(HandledException):
+            Day('foo')
+            Day(None)
+            Day(3)
+            Day('2024-02-30')
+
     def test_Day_weekday(self):
         """Test Day.weekday."""
         self.assertEqual(Day('2024-03-17').weekday, 'Sunday')