Add support for django 4.0 (#62)

src/dockerflow/django/middleware.py

@@ -38,8 +38,10 @@ class DockerflowMiddleware(MiddlewareMixin):
         (re.compile(r"/__lbheartbeat__/?$"), views.lbheartbeat),
     ]
 
-    def __init__(self, *args, **kwargs):
-        super(DockerflowMiddleware, self).__init__(*args, **kwargs)
+    def __init__(self, get_response=None, *args, **kwargs):
+        super(DockerflowMiddleware, self).__init__(
+            get_response=get_response, *args, **kwargs
+        )
         self.summary_logger = logging.getLogger("request.summary")
 
     def process_request(self, request):

src/dockerflow/django/signals.py

@@ -35,5 +35,5 @@ def heartbeat_failed_handler(sender, level, **kwargs):
 """
 from django.dispatch import Signal
 
-heartbeat_passed = Signal(providing_args=["level"])
-heartbeat_failed = Signal(providing_args=["level"])
+heartbeat_passed = Signal()
+heartbeat_failed = Signal()

tests/constraints/django-4.0.txt

@@ -0,0 +1 @@
+Django>=4.0,<4.1

tests/django/test_django.py

@@ -11,6 +11,7 @@
 from django.core.exceptions import ImproperlyConfigured
 from django.db import connection
 from django.db.utils import OperationalError, ProgrammingError
+from django.http import HttpResponse
 from django.test.utils import CaptureQueriesContext
 
 from dockerflow import health
@@ -35,7 +36,7 @@ def reset_checks():
 
 @pytest.fixture
 def dockerflow_middleware():
-    return DockerflowMiddleware()
+    return DockerflowMiddleware(get_response=HttpResponse())
 
 
 @pytest.mark.parametrize("request_path", ["/__version__", "/__version__/"])
@@ -155,7 +156,7 @@ def process_request(self, request):
         def process_response(self, request, response):
             return response
 
-    hostile_middleware = HostileMiddleware()
+    hostile_middleware = HostileMiddleware(get_response=HttpResponse())
     response = dockerflow_middleware.process_request(dockerflow_request)
     response = hostile_middleware.process_request(dockerflow_request)
     response = hostile_middleware.process_response(dockerflow_request, response)

tox.ini

@@ -5,6 +5,7 @@ envlist =
     py38-lint
     py38-docs
     py{36,37,38,39}-dj{22,30,31}
+    py{38,39}-dj{40}
     py{36,37,38,39}-fl{011,012,10}
     py{36,37,38,39}-s{19,20}
 
@@ -23,20 +24,21 @@ setenv =
     PYTHONPATH = {toxinidir}
 deps =
     -rtests/requirements/default.txt
-    dj{22,30,31}: -rtests/requirements/django.txt
+    dj{22,30,31,40}: -rtests/requirements/django.txt
     fl{011,012,10}: -rtests/requirements/flask.txt
     s{19,20}: -rtests/requirements/sanic.txt
     dj22: -ctests/constraints/django-2.2.txt
     dj30: -ctests/constraints/django-3.0.txt
     dj31: -ctests/constraints/django-3.1.txt
+    dj40: -ctests/constraints/django-4.0.txt
     fl011: -ctests/constraints/flask-0.11.txt
     fl012: -ctests/constraints/flask-0.12.txt
     fl10: -ctests/constraints/flask-1.0.txt
     s19: -ctests/constraints/sanic-19.txt
     s20: -ctests/constraints/sanic-20.txt
 commands =
     python --version
-    dj{22,30,31}: pytest tests/core/ tests/django --nomigrations {posargs:}
+    dj{22,30,31,40}: pytest tests/core/ tests/django --nomigrations {posargs:}
     fl{011,012,10}: pytest tests/core/ tests/flask/ {posargs:}
     s{19,20}: pytest tests/core/ tests/sanic/ {posargs:}