fix: add support for date, datetime form fields

using buefy-based picker widgets etc.

tests/forms/test_schema.py

@@ -1,5 +1,7 @@
 # -*- coding: utf-8; -*-
 
+import datetime
+from unittest import TestCase
 from unittest.mock import patch
 
 import colander
@@ -13,6 +15,22 @@ from wuttaweb.forms import widgets
 from tests.util import DataTestCase, WebTestCase
 
 
+class TestWutaDateTime(TestCase):
+
+    def test_deserialize(self):
+        typ = mod.WuttaDateTime()
+        node = colander.SchemaNode(typ)
+
+        result = typ.deserialize(node, colander.null)
+        self.assertIs(result, colander.null)
+
+        result = typ.deserialize(node, '2024-12-11T10:33 PM')
+        self.assertIsInstance(result, datetime.datetime)
+        self.assertEqual(result, datetime.datetime(2024, 12, 11, 22, 33))
+
+        self.assertRaises(colander.Invalid, typ.deserialize, node, 'bogus')
+
+
 class TestObjectNode(DataTestCase):
 
     def setUp(self):