Advanced to version 0.6.2.

.readthedocs.yaml

@@ -26,7 +26,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.7"
+    python: "3.8"
 
 # Build documentation in the docs/ directory with Sphinx
 

docs/source/changelog.rst

@@ -2,6 +2,37 @@ Change Log
 ==========
 
 
+Version 0.6.2
+-------------
+
+Released 2023/6/10
+
+* Changed logging from STDERR to the Flask logger.
+* Test case updates:
+  * Added missing documentation.
+  * Changed properties from public to private.
+  * Disabled logging.
+
+
+Version 0.6.1
+-------------
+
+Released 2023/5/3
+
+* Revised the code for the upcoming Werkzeug 2.4.
+
+
+Version 0.6.0
+-------------
+
+Released 2023/4/26
+
+* Updated the minimal Python version to 3.8.
+* Switched from ``setup.cfg`` to ``pyproject.toml``.
+* Added the change log.
+* Simplified ``README.rst``.
+
+
 Version 0.5.0
 -------------
 

src/flask_digest_auth/__init__.py

@@ -22,5 +22,5 @@ from flask_digest_auth.algo import make_password_hash, calc_response
 from flask_digest_auth.auth import DigestAuth
 from flask_digest_auth.test import Client
 
-VERSION: str = "0.5.0"
+VERSION: str = "0.6.2"
 """The package version."""

src/flask_digest_auth/algo.py

@@ -20,8 +20,8 @@
 """
 from __future__ import annotations
 
-import typing as t
 from hashlib import md5
+from typing import Optional, Literal
 
 
 def make_password_hash(realm: str, username: str, password: str) -> str:
@@ -44,10 +44,10 @@ def make_password_hash(realm: str, username: str, password: str) -> str:
 
 def calc_response(
         method: str, uri: str, password_hash: str,
-        nonce: str, qop: t.Optional[t.Literal["auth", "auth-int"]] = None,
-        algorithm: t.Optional[t.Literal["MD5", "MD5-sess"]] = "MD5-sess",
-        cnonce: t.Optional[str] = None, nc: t.Optional[str] = None,
-        body: t.Optional[bytes] = None) -> str:
+        nonce: str, qop: Optional[Literal["auth", "auth-int"]] = None,
+        algorithm: Optional[Literal["MD5", "MD5-sess"]] = "MD5-sess",
+        cnonce: Optional[str] = None, nc: Optional[str] = None,
+        body: Optional[bytes] = None) -> str:
     """Calculates the response value of the HTTP digest authentication.
 
     :param method: The request method.

src/flask_digest_auth/auth.py

@@ -23,9 +23,9 @@ See `RFC 2617`_ HTTP Authentication: Basic and Digest Access Authentication
 from __future__ import annotations
 
 import sys
-import typing as t
 from functools import wraps
 from secrets import token_urlsafe, randbits
+from typing import Any, Optional, Literal, Callable, List
 
 from flask import g, request, Response, session, abort, Flask, Request, \
     current_app
@@ -38,7 +38,7 @@ from flask_digest_auth.algo import calc_response
 class DigestAuth:
     """The HTTP digest authentication."""
 
-    def __init__(self, realm: t.Optional[str] = None):
+    def __init__(self, realm: Optional[str] = None):
         """Constructs the HTTP digest authentication.
 
         :param realm: The realm.
@@ -48,16 +48,15 @@ class DigestAuth:
         """The serializer to generate and validate the nonce and opaque."""
         self.realm: str = "Login Required" if realm is None else realm
         """The realm.  Default is "Login Required"."""
-        self.algorithm: t.Optional[t.Literal["MD5", "MD5-sess"]] = None
+        self.algorithm: Optional[Literal["MD5", "MD5-sess"]] = None
         """The algorithm, either None, ``MD5``, or ``MD5-sess``.  Default is
         None."""
         self.use_opaque: bool = True
         """Whether to use an opaque.  Default is True."""
-        self.__domain: t.List[str] = []
+        self.__domain: List[str] = []
         """A list of directories that this username and password applies to.
         Default is empty."""
-        self.__qop: t.List[t.Literal["auth", "auth-int"]] \
-            = ["auth", "auth-int"]
+        self.__qop: List[Literal["auth", "auth-int"]] = ["auth", "auth-int"]
         """A list of supported quality of protection supported, either
         ``qop``, ``auth-int``, both, or empty.  Default is both."""
         self.__get_password_hash: BasePasswordHashGetter \
@@ -68,7 +67,7 @@ class DigestAuth:
         self.__on_login: BaseOnLogInCallback = BaseOnLogInCallback()
         """The callback to run when the user logs in."""
 
-    def login_required(self, view) -> t.Callable:
+    def login_required(self, view) -> Callable:
         """The view decorator for the HTTP digest authentication.
 
         :Example:
@@ -89,7 +88,7 @@ class DigestAuth:
         class NoLogInException(Exception):
             """The exception thrown when the user is not authorized."""
 
-        def get_logged_in_user() -> t.Any:
+        def get_logged_in_user() -> Any:
             """Returns the currently logged-in user.
 
             :return: The currently logged-in user.
@@ -97,13 +96,13 @@ class DigestAuth:
             """
             if "user" not in session:
                 raise NoLogInException
-            user: t.Optional[t.Any] = self.__get_user(session["user"])
+            user: Optional[Any] = self.__get_user(session["user"])
             if user is None:
                 del session["user"]
                 raise NoLogInException
             return user
 
-        def auth_user(state: AuthState) -> t.Any:
+        def auth_user(state: AuthState) -> Any:
             """Authenticates a user.
 
             :param state: The authentication state.
@@ -121,7 +120,7 @@ class DigestAuth:
             return self.__get_user(authorization.username)
 
         @wraps(view)
-        def login_required_view(*args, **kwargs) -> t.Any:
+        def login_required_view(*args, **kwargs) -> Any:
             """The login-protected view.
 
             :param args: The positional arguments of the view.
@@ -141,7 +140,7 @@ class DigestAuth:
                 return view(*args, **kwargs)
             except UnauthorizedException as e:
                 if len(e.args) > 0:
-                    sys.stderr.write(e.args[0] + "\n")
+                    current_app.logger.warning(e.args[0])
                 response: Response = Response()
                 response.status = 401
                 response.headers["WWW-Authenticate"] \
@@ -171,7 +170,7 @@ class DigestAuth:
             except BadData:
                 raise UnauthorizedException("Invalid opaque")
             state.opaque = authorization.opaque
-        password_hash: t.Optional[str] \
+        password_hash: Optional[str] \
             = self.__get_password_hash(authorization.username)
         if password_hash is None:
             raise UnauthorizedException(
@@ -202,7 +201,7 @@ class DigestAuth:
         :return: The ``WWW-Authenticate`` response header.
         """
 
-        def get_opaque() -> t.Optional[str]:
+        def get_opaque() -> Optional[str]:
             """Returns the opaque value.
 
             :return: The opaque value.
@@ -213,7 +212,7 @@ class DigestAuth:
                 return state.opaque
             return self.__serializer.dumps(randbits(32), salt="opaque")
 
-        opaque: t.Optional[str] = get_opaque()
+        opaque: Optional[str] = get_opaque()
         nonce: str = self.__serializer.dumps(
             randbits(32),
             salt="nonce" if opaque is None else f"nonce-{opaque}")
@@ -226,7 +225,7 @@ class DigestAuth:
         if opaque is not None:
             header += f", opaque=\"{opaque}\""
         if state.stale is not None:
-            header += f", stale=TRUE" if state.stale else f", stale=FALSE"
+            header += ", stale=TRUE" if state.stale else ", stale=FALSE"
         if self.algorithm is not None:
             header += f", algorithm=\"{self.algorithm}\""
         if len(self.__qop) > 0:
@@ -234,7 +233,7 @@ class DigestAuth:
             header += f", qop=\"{qop_list}\""
         return header
 
-    def register_get_password(self, func: t.Callable[[str], t.Optional[str]])\
+    def register_get_password(self, func: Callable[[str], Optional[str]]) \
             -> None:
         """The decorator to register the callback to obtain the password hash.
 
@@ -256,7 +255,7 @@ class DigestAuth:
             """The base password hash getter."""
 
             @staticmethod
-            def __call__(username: str) -> t.Optional[str]:
+            def __call__(username: str) -> Optional[str]:
                 """Returns the password hash of a user.
 
                 :param username: The username.
@@ -266,8 +265,7 @@ class DigestAuth:
 
         self.__get_password_hash = PasswordHashGetter()
 
-    def register_get_user(self, func: t.Callable[[str], t.Optional[t.Any]])\
-            -> None:
+    def register_get_user(self, func: Callable[[str], Optional[Any]]) -> None:
         """The decorator to register the callback to obtain the user.
 
         :Example:
@@ -287,7 +285,7 @@ class DigestAuth:
             """The user getter."""
 
             @staticmethod
-            def __call__(username: str) -> t.Optional[t.Any]:
+            def __call__(username: str) -> Optional[Any]:
                 """Returns a user.
 
                 :param username: The username.
@@ -297,7 +295,7 @@ class DigestAuth:
 
         self.__get_user = UserGetter()
 
-    def register_on_login(self, func: t.Callable[[t.Any], None]) -> None:
+    def register_on_login(self, func: Callable[[Any], None]) -> None:
         """The decorator to register the callback to run when the user logs in.
 
         :Example:
@@ -316,7 +314,7 @@ class DigestAuth:
             """The callback when the user logs in."""
 
             @staticmethod
-            def __call__(user: t.Any) -> None:
+            def __call__(user: Any) -> None:
                 """Runs the callback when the user logs in.
 
                 :param user: The logged-in user.
@@ -346,50 +344,57 @@ class DigestAuth:
             self.realm = app.config["DIGEST_AUTH_REALM"]
 
         if hasattr(app, "login_manager"):
-            from flask_login import LoginManager, login_user
+            self.__init_login_manager(app)
 
-            login_manager: LoginManager = getattr(app, "login_manager")
+    def __init_login_manager(self, app: Flask) -> None:
+        """Initializes the Flask-Login login manager.
 
-            @login_manager.unauthorized_handler
-            def unauthorized() -> None:
-                """Handles when the user is unauthorized.
+        :param app: The Flask application.
+        :return: None.
+        """
+        from flask_login import LoginManager, login_user
+        login_manager: LoginManager = getattr(app, "login_manager")
 
-                :return: None.
-                """
-                state: AuthState = getattr(request, "_digest_auth_state") \
-                    if hasattr(request, "_digest_auth_state") \
-                    else AuthState()
-                response: Response = Response()
-                response.status = 401
-                response.headers["WWW-Authenticate"] \
-                    = self.__make_response_header(state)
-                abort(response)
+        @login_manager.unauthorized_handler
+        def unauthorized() -> None:
+            """Handles when the user is unauthorized.
 
-            @login_manager.request_loader
-            def load_user_from_request(req: Request) -> t.Optional[t.Any]:
-                """Loads the user from the request header.
+            :return: None.
+            """
+            state: AuthState = getattr(request, "_digest_auth_state") \
+                if hasattr(request, "_digest_auth_state") \
+                else AuthState()
+            response: Response = Response()
+            response.status = 401
+            response.headers["WWW-Authenticate"] \
+                = self.__make_response_header(state)
+            abort(response)
 
-                :param req: The request.
-                :return: The authenticated user, or None if the
-                    authentication fails
-                """
-                request._digest_auth_state = AuthState()
-                authorization: Authorization = req.authorization
-                try:
-                    if authorization is None:
-                        raise UnauthorizedException
-                    if authorization.type != "digest":
-                        raise UnauthorizedException(
-                            "Not an HTTP digest authorization")
-                    self.__authenticate(request._digest_auth_state)
-                    user = login_manager.user_callback(authorization.username)
-                    login_user(user)
-                    self.__on_login(user)
-                    return user
-                except UnauthorizedException as e:
-                    if str(e) != "":
-                        app.logger.warning(str(e))
-                    return None
+        @login_manager.request_loader
+        def load_user_from_request(req: Request) -> Optional[Any]:
+            """Loads the user from the request header.
+
+            :param req: The request.
+            :return: The authenticated user, or None if the
+                authentication fails
+            """
+            request._digest_auth_state = AuthState()
+            authorization: Authorization = req.authorization
+            try:
+                if authorization is None:
+                    raise UnauthorizedException
+                if authorization.type != "digest":
+                    raise UnauthorizedException(
+                        "Not an HTTP digest authorization")
+                self.__authenticate(request._digest_auth_state)
+                user = login_manager.user_callback(authorization.username)
+                login_user(user)
+                self.__on_login(user)
+                return user
+            except UnauthorizedException as e:
+                if str(e) != "":
+                    app.logger.warning(str(e))
+                return None
 
     def logout(self) -> None:
         """Logs out the user.
@@ -427,9 +432,9 @@ class AuthState:
 
     def __init__(self):
         """Constructs the authorization state."""
-        self.opaque: t.Optional[str] = None
+        self.opaque: Optional[str] = None
         """The opaque value specified by the client, if valid."""
-        self.stale: t.Optional[bool] = None
+        self.stale: Optional[bool] = None
         """The stale value, if there is a previous log in attempt."""
 
 
@@ -446,7 +451,7 @@ class BasePasswordHashGetter:
     """
 
     @staticmethod
-    def __call__(username: str) -> t.Optional[str]:
+    def __call__(username: str) -> Optional[str]:
         """Returns the password hash of a user.
 
         :param username: The username.
@@ -467,7 +472,7 @@ class BaseUserGetter:
     """
 
     @staticmethod
-    def __call__(username: str) -> t.Optional[t.Any]:
+    def __call__(username: str) -> Optional[Any]:
         """Returns a user.
 
         :param username: The username.
@@ -487,7 +492,7 @@ class BaseOnLogInCallback:
     """
 
     @staticmethod
-    def __call__(user: t.Any) -> None:
+    def __call__(user: Any) -> None:
         """Runs the callback when the user logs in.
 
         :param user: The logged-in user.

src/flask_digest_auth/test.py

@@ -18,11 +18,12 @@
 """The test client with HTTP digest authentication enabled.
 
 """
-import typing as t
 from secrets import token_urlsafe
+from typing import Optional, Literal, Tuple, Dict
 
 from flask import g
 from werkzeug.datastructures import Authorization, WWWAuthenticate
+from werkzeug.http import parse_set_header
 from werkzeug.test import TestResponse, Client as WerkzeugClient
 
 from flask_digest_auth.algo import calc_response, make_password_hash
@@ -83,7 +84,7 @@ class Client(WerkzeugClient):
     .. _pytest: https://pytest.org
     """
 
-    def open(self, *args, digest_auth: t.Optional[t.Tuple[str, str]] = None,
+    def open(self, *args, digest_auth: Optional[Tuple[str, str]] = None,
              **kwargs) -> TestResponse:
         """Opens a request.
 
@@ -117,14 +118,14 @@ class Client(WerkzeugClient):
         :param password: The password.
         :return: The request authorization.
         """
-        qop: t.Optional[t.Literal["auth", "auth-int"]] = None
-        if www_authenticate.qop is not None and "auth" in www_authenticate.qop:
+        qop: Optional[Literal["auth", "auth-int"]] = None
+        if "auth" in parse_set_header(www_authenticate.get("qop")):
             qop = "auth"
 
-        cnonce: t.Optional[str] = None
+        cnonce: Optional[str] = None
         if qop is not None or www_authenticate.algorithm == "MD5-sess":
             cnonce = token_urlsafe(8)
-        nc: t.Optional[str] = None
+        nc: Optional[str] = None
         count: int = 1
         if qop is not None:
             nc: str = hex(count)[2:].zfill(8)
@@ -137,7 +138,7 @@ class Client(WerkzeugClient):
             algorithm=www_authenticate.algorithm, cnonce=cnonce, nc=nc,
             body=None)
 
-        data: t.Dict[str, str] = {
+        data: Dict[str, str] = {
             "username": username, "realm": www_authenticate.realm,
             "nonce": www_authenticate.nonce, "uri": uri, "response": expected}
         if www_authenticate.algorithm is not None:

tests/test_algo.py

@@ -18,8 +18,8 @@
 """The test case for the HTTP digest authentication algorithm.
 
 """
-import typing as t
 import unittest
+from typing import Optional, Literal
 
 from flask_digest_auth import make_password_hash, calc_response
 
@@ -39,11 +39,11 @@ class AlgorithmTestCase(unittest.TestCase):
         method: str = "GET"
         uri: str = "/dir/index.html"
         nonce: str = "dcd98b7102dd2f0e8b11d0f600bfb0c093"
-        qop: t.Optional[t.Literal["auth", "auth-int"]] = "auth"
-        algorithm: t.Optional[t.Literal["MD5", "MD5-sess"]] = None
-        cnonce: t.Optional[str] = "0a4f113b"
-        nc: t.Optional[str] = "00000001"
-        body: t.Optional[bytes] = None
+        qop: Optional[Literal["auth", "auth-int"]] = "auth"
+        algorithm: Optional[Literal["MD5", "MD5-sess"]] = None
+        cnonce: Optional[str] = "0a4f113b"
+        nc: Optional[str] = "00000001"
+        body: Optional[bytes] = None
 
         password_hash: str = make_password_hash(realm, username, password)
         response: str = calc_response(method, uri, password_hash, nonce, qop,

tests/test_auth.py

@@ -18,8 +18,9 @@
 """The test case for the HTTP digest authentication.
 
 """
-import typing as t
+import logging
 from secrets import token_urlsafe
+from typing import Any, Optional, Dict
 
 from flask import Response, Flask, g, redirect, request
 from flask_testing import TestCase
@@ -28,8 +29,11 @@ from werkzeug.datastructures import WWWAuthenticate, Authorization
 from flask_digest_auth import DigestAuth, make_password_hash, Client
 
 _REALM: str = "testrealm@host.com"
+"""The realm."""
 _USERNAME: str = "Mufasa"
+"""The username."""
 _PASSWORD: str = "Circle Of Life"
+"""The password."""
 
 
 class User:
@@ -42,9 +46,11 @@ class User:
         :param password: The clear-text password.
         """
         self.username: str = username
-        self.password_hash: str = make_password_hash(
-            _REALM, username, password)
+        """The username."""
+        self.password_hash: str = make_password_hash(_REALM, username, password)
+        """The password hash."""
         self.visits: int = 0
+        """The number of visits."""
 
 
 class AuthenticationTestCase(TestCase):
@@ -55,6 +61,7 @@ class AuthenticationTestCase(TestCase):
 
         :return: The Flask application.
         """
+        logging.getLogger("test_auth").addHandler(logging.NullHandler())
         app: Flask = Flask(__name__)
         app.config.from_mapping({
             "TESTING": True,
@@ -65,11 +72,12 @@ class AuthenticationTestCase(TestCase):
 
         auth: DigestAuth = DigestAuth()
         auth.init_app(app)
-        self.user: User = User(_USERNAME, _PASSWORD)
-        user_db: t.Dict[str, User] = {_USERNAME: self.user}
+        self.__user: User = User(_USERNAME, _PASSWORD)
+        """The user account."""
+        user_db: Dict[str, User] = {_USERNAME: self.__user}
 
         @auth.register_get_password
-        def get_password_hash(username: str) -> t.Optional[str]:
+        def get_password_hash(username: str) -> Optional[str]:
             """Returns the password hash of a user.
 
             :param username: The username.
@@ -79,7 +87,7 @@ class AuthenticationTestCase(TestCase):
                 else None
 
         @auth.register_get_user
-        def get_user(username: str) -> t.Optional[t.Any]:
+        def get_user(username: str) -> Optional[Any]:
             """Returns a user.
 
             :param username: The username.
@@ -142,7 +150,7 @@ class AuthenticationTestCase(TestCase):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.data.decode("UTF-8"),
                          f"Hello, {_USERNAME}! #2")
-        self.assertEqual(self.user.visits, 1)
+        self.assertEqual(self.__user.visits, 1)
 
     def test_stale_opaque(self) -> None:
         """Tests the stale and opaque value.
@@ -158,7 +166,7 @@ class AuthenticationTestCase(TestCase):
         self.assertEqual(response.status_code, 401)
         www_authenticate = response.www_authenticate
         self.assertEqual(www_authenticate.type, "digest")
-        self.assertEqual(www_authenticate.stale, None)
+        self.assertIsNone(www_authenticate.get("stale"))
         opaque: str = www_authenticate.opaque
 
         www_authenticate.nonce = "bad"
@@ -167,7 +175,7 @@ class AuthenticationTestCase(TestCase):
         response = super(Client, self.client).get(admin_uri, auth=auth_data)
         self.assertEqual(response.status_code, 401)
         www_authenticate = response.www_authenticate
-        self.assertEqual(www_authenticate.stale, True)
+        self.assertEqual(www_authenticate.get("stale"), "TRUE")
         self.assertEqual(www_authenticate.opaque, opaque)
 
         auth_data = Client.make_authorization(
@@ -175,7 +183,7 @@ class AuthenticationTestCase(TestCase):
         response = super(Client, self.client).get(admin_uri, auth=auth_data)
         self.assertEqual(response.status_code, 401)
         www_authenticate = response.www_authenticate
-        self.assertEqual(www_authenticate.stale, False)
+        self.assertEqual(www_authenticate.get("stale"), "FALSE")
         self.assertEqual(www_authenticate.opaque, opaque)
 
         auth_data = Client.make_authorization(
@@ -219,4 +227,4 @@ class AuthenticationTestCase(TestCase):
 
         response = self.client.get(admin_uri)
         self.assertEqual(response.status_code, 200)
-        self.assertEqual(self.user.visits, 2)
+        self.assertEqual(self.__user.visits, 2)

tests/test_flask_login.py

@@ -18,8 +18,9 @@
 """The test case for the Flask-Login integration.
 
 """
-import typing as t
+import logging
 from secrets import token_urlsafe
+from typing import Optional, Dict
 
 from flask import Response, Flask, g, redirect, request
 from flask_testing import TestCase
@@ -28,8 +29,11 @@ from werkzeug.datastructures import WWWAuthenticate, Authorization
 from flask_digest_auth import DigestAuth, make_password_hash, Client
 
 _REALM: str = "testrealm@host.com"
+"""The realm."""
 _USERNAME: str = "Mufasa"
+"""The username."""
 _PASSWORD: str = "Circle Of Life"
+"""The password."""
 
 
 class User:
@@ -42,11 +46,15 @@ class User:
         :param password: The clear-text password.
         """
         self.username: str = username
-        self.password_hash: str = make_password_hash(
-            _REALM, username, password)
+        """The username."""
+        self.password_hash: str = make_password_hash(_REALM, username, password)
+        """The password hash."""
         self.visits: int = 0
+        """The number of visits."""
         self.is_active: bool = True
+        """True if the account is active, or False otherwise."""
         self.is_anonymous: bool = False
+        """True if the account is anonymous, or False otherwise."""
 
     def get_id(self) -> str:
         """Returns the username.
@@ -75,6 +83,7 @@ class FlaskLoginTestCase(TestCase):
 
         :return: The Flask application.
         """
+        logging.getLogger("test_flask_login").addHandler(logging.NullHandler())
         app: Flask = Flask(__name__)
         app.config.from_mapping({
             "TESTING": True,
@@ -83,11 +92,12 @@ class FlaskLoginTestCase(TestCase):
         })
         app.test_client_class = Client
 
-        self.has_flask_login: bool = True
+        self.__has_flask_login: bool = True
+        """Whether the Flask-Login package is installed."""
         try:
             import flask_login
         except ModuleNotFoundError:
-            self.has_flask_login = False
+            self.__has_flask_login = False
             return app
 
         login_manager: flask_login.LoginManager = flask_login.LoginManager()
@@ -96,11 +106,12 @@ class FlaskLoginTestCase(TestCase):
         auth: DigestAuth = DigestAuth()
         auth.init_app(app)
 
-        self.user: User = User(_USERNAME, _PASSWORD)
-        user_db: t.Dict[str, User] = {_USERNAME: self.user}
+        self.__user: User = User(_USERNAME, _PASSWORD)
+        """The user account."""
+        user_db: Dict[str, User] = {_USERNAME: self.__user}
 
         @auth.register_get_password
-        def get_password_hash(username: str) -> t.Optional[str]:
+        def get_password_hash(username: str) -> Optional[str]:
             """Returns the password hash of a user.
 
             :param username: The username.
@@ -119,7 +130,7 @@ class FlaskLoginTestCase(TestCase):
             user.visits = user.visits + 1
 
         @login_manager.user_loader
-        def load_user(user_id: str) -> t.Optional[User]:
+        def load_user(user_id: str) -> Optional[User]:
             """Loads a user.
 
             :param user_id: The username.
@@ -162,7 +173,7 @@ class FlaskLoginTestCase(TestCase):
 
         :return: None.
         """
-        if not self.has_flask_login:
+        if not self.__has_flask_login:
             self.skipTest("Skipped without Flask-Login.")
 
         response: Response = self.client.get(self.app.url_for("admin-1"))
@@ -176,14 +187,14 @@ class FlaskLoginTestCase(TestCase):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.data.decode("UTF-8"),
                          f"Hello, {_USERNAME}! #2")
-        self.assertEqual(self.user.visits, 1)
+        self.assertEqual(self.__user.visits, 1)
 
     def test_stale_opaque(self) -> None:
         """Tests the stale and opaque value.
 
         :return: None.
         """
-        if not self.has_flask_login:
+        if not self.__has_flask_login:
             self.skipTest("Skipped without Flask-Login.")
 
         admin_uri: str = self.app.url_for("admin-1")
@@ -195,7 +206,7 @@ class FlaskLoginTestCase(TestCase):
         self.assertEqual(response.status_code, 401)
         www_authenticate = response.www_authenticate
         self.assertEqual(www_authenticate.type, "digest")
-        self.assertEqual(www_authenticate.stale, None)
+        self.assertIsNone(www_authenticate.get("stale"))
         opaque: str = www_authenticate.opaque
 
         if hasattr(g, "_login_user"):
@@ -206,7 +217,7 @@ class FlaskLoginTestCase(TestCase):
         response = super(Client, self.client).get(admin_uri, auth=auth_data)
         self.assertEqual(response.status_code, 401)
         www_authenticate = response.www_authenticate
-        self.assertEqual(www_authenticate.stale, True)
+        self.assertEqual(www_authenticate.get("stale"), "TRUE")
         self.assertEqual(www_authenticate.opaque, opaque)
 
         if hasattr(g, "_login_user"):
@@ -216,7 +227,7 @@ class FlaskLoginTestCase(TestCase):
         response = super(Client, self.client).get(admin_uri, auth=auth_data)
         self.assertEqual(response.status_code, 401)
         www_authenticate = response.www_authenticate
-        self.assertEqual(www_authenticate.stale, False)
+        self.assertEqual(www_authenticate.get("stale"), "FALSE")
         self.assertEqual(www_authenticate.opaque, opaque)
 
         if hasattr(g, "_login_user"):
@@ -231,7 +242,7 @@ class FlaskLoginTestCase(TestCase):
 
         :return: None.
         """
-        if not self.has_flask_login:
+        if not self.__has_flask_login:
             self.skipTest("Skipped without Flask-Login.")
 
         admin_uri: str = self.app.url_for("admin-1")
@@ -265,33 +276,33 @@ class FlaskLoginTestCase(TestCase):
 
         response = self.client.get(admin_uri)
         self.assertEqual(response.status_code, 200)
-        self.assertEqual(self.user.visits, 2)
+        self.assertEqual(self.__user.visits, 2)
 
     def test_disabled(self) -> None:
         """Tests the disabled user.
 
         :return: None.
         """
-        if not self.has_flask_login:
+        if not self.__has_flask_login:
             self.skipTest("Skipped without Flask-Login.")
 
         response: Response
 
-        self.user.is_active = False
+        self.__user.is_active = False
         response = self.client.get(self.app.url_for("admin-1"))
         self.assertEqual(response.status_code, 401)
         response = self.client.get(self.app.url_for("admin-1"),
                                    digest_auth=(_USERNAME, _PASSWORD))
         self.assertEqual(response.status_code, 401)
 
-        self.user.is_active = True
+        self.__user.is_active = True
         response = self.client.get(self.app.url_for("admin-1"),
                                    digest_auth=(_USERNAME, _PASSWORD))
         self.assertEqual(response.status_code, 200)
         response = self.client.get(self.app.url_for("admin-1"))
         self.assertEqual(response.status_code, 200)
 
-        self.user.is_active = False
+        self.__user.is_active = False
         response = self.client.get(self.app.url_for("admin-1"))
         self.assertEqual(response.status_code, 401)
         response = self.client.get(self.app.url_for("admin-1"),