Add some validation rules

tests/test_validation.py

@@ -0,0 +1,12 @@
+from datetime import date
+
+from pydantic import ValidationError
+import pytest
+from tests.dummy import dummy_passport
+from validation.from_passport import FromPassport
+
+
+def test_check_expiry_date_after_issue_date() -> None:
+    dummy = dummy_passport()
+    with pytest.raises(ValidationError):
+        dummy.expiry_date = date(1900, 1, 1)