Add datetime and timestamp fields

test/test_db.py

@@ -1,4 +1,6 @@
+from datetime import datetime
 from pprint import pprint as print
+from time import sleep
 
 import pytest
 from tinydb import Query
@@ -133,3 +135,14 @@ def test_password(db):
     assert check("fnord", user.password)
     assert not check("wrong password", user.password)
     assert not check("", user.password)
+
+
+def test_datetime(db):
+    user = db.save(examples.User(name="john", email="john@foo", password="fnord", created=datetime.utcnow()))
+    assert user.created > datetime.utcfromtimestamp(0)
+    assert user.created < datetime.utcnow()
+    assert user.last_updated == user.created
+
+    sleep(1)
+    user = db.save(user)
+    assert user.last_updated >= user.created