token_expires_at as datetime obj

bookops_worldcat/authorize.py

@@ -94,7 +94,7 @@ def __init__(
         self.secret = secret
         self.server_response: Optional[requests.Response] = None
         self.timeout = timeout
-        self.token_expires_at = ""
+        self.token_expires_at: Optional[datetime.datetime] = None
         self.token_str = ""
         self.token_type = ""
 
@@ -146,7 +146,7 @@ def __init__(
     def _auth(self) -> Tuple[str, str]:
         return (self.key, self.secret)
 
-    def _hasten_expiration_time(self, utc_stamp_str: str) -> str:
+    def _hasten_expiration_time(self, utc_stamp_str: str) -> datetime.datetime:
         """
         Resets expiration time one second earlier to account
         for any delays between expiration check and request for
@@ -161,7 +161,7 @@ def _hasten_expiration_time(self, utc_stamp_str: str) -> str:
         utcstamp = datetime.datetime.strptime(
             utc_stamp_str, "%Y-%m-%d %H:%M:%SZ"
         ) - datetime.timedelta(seconds=1)
-        return datetime.datetime.strftime(utcstamp, "%Y-%m-%d %H:%M:%SZ")
+        return utcstamp
 
     def _parse_server_response(self, response: requests.Response) -> None:
         """Parses authorization server response"""
@@ -235,20 +235,16 @@ def is_expired(self) -> bool:
         >>> token.is_expired()
         False
         """
-        try:
-            if (
-                datetime.datetime.strptime(self.token_expires_at, "%Y-%m-%d %H:%M:%SZ")
-                < datetime.datetime.utcnow()
-            ):
+        if isinstance(self.token_expires_at, datetime.datetime):
+            if self.token_expires_at < datetime.datetime.utcnow():
                 return True
             else:
                 return False
-        except TypeError:
-            raise
-        except ValueError:
-            raise
+        else:
+            raise TypeError
 
     def __repr__(self):
         return (
-            f"access_token: '{self.token_str}', expires_at: '{self.token_expires_at}'"
+            f"access_token: '{self.token_str}', "
+            f"expires_at: '{self.token_expires_at:%Y-%m-%d %H:%M:%SZ}'"
         )

tests/test_authorize.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 
 import datetime
-from contextlib import nullcontext as does_not_raise
 import os
 
 import pytest
@@ -264,7 +263,9 @@ def test_auth(self, mock_successful_post_token_response):
     def test_hasten_expiration_time(self, mock_token):
         utc_stamp = "2020-01-01 17:19:59Z"
         token = mock_token
-        assert token._hasten_expiration_time(utc_stamp) == "2020-01-01 17:19:58Z"
+        timestamp = token._hasten_expiration_time(utc_stamp)
+        assert isinstance(timestamp, datetime.datetime)
+        assert timestamp == datetime.datetime(2020, 1, 1, 17, 19, 58, 0)
 
     def test_payload(self, mock_successful_post_token_response):
         token = WorldcatAccessToken(
@@ -347,16 +348,15 @@ def test_is_expired_false(
 
     def test_is_expired_true(self, mock_utcnow, mock_token):
         mock_token.is_expired() is False
-        mock_token.token_expires_at = datetime.datetime.strftime(
-            datetime.datetime.utcnow() - datetime.timedelta(0, 1),
-            "%Y-%m-%d %H:%M:%SZ",
+        mock_token.token_expires_at = datetime.datetime.utcnow() - datetime.timedelta(
+            0, 1
         )
 
         assert mock_token.is_expired() is True
 
     @pytest.mark.parametrize(
         "arg,expectation",
-        [(None, pytest.raises(TypeError)), ("20-01-01", pytest.raises(ValueError))],
+        [(None, pytest.raises(TypeError))],
     )
     def test_is_expired_exception(self, arg, expectation, mock_token):
         mock_token.token_expires_at = arg
@@ -439,5 +439,4 @@ def test_post_token_request_with_live_service(self, live_keys):
         # test if token looks right
         assert token.token_str.startswith("tk_")
         assert token.is_expired() is False
-        with does_not_raise():
-            datetime.datetime.strptime(token.token_expires_at, "%Y-%m-%d %H:%M:%SZ")
+        assert isinstance(token.token_expires_at, datetime.datetime)