Add Django 5.0 to test matrix (fixes #704)

- timezone information is now on by default, and serilizers are expecting zulu time.
- Replace manual timestamp truncation with datetime timespec set to milliseconds

Author: JeremyLWright

.github/workflows/python.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.8, 3.9, "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v2.3.4

noxfile.py

@@ -2,7 +2,7 @@
 
 
 @nox.session()
-@nox.parametrize("django", ["4.1", "4.2"])
+@nox.parametrize("django", ["4.1", "4.2", "5.0"])
 def tests(session, django):
     session.install("poetry")
     session.run("poetry", "install", "-E", "minify")

tests/serializer/test_dumps.py

@@ -162,7 +162,7 @@ def test_complicated_model():
 
     expected = {
         "date": str(model.date),
-        "datetime": model.datetime.isoformat()[:-3],
+        "datetime": model.datetime.isoformat(timespec="milliseconds").replace("+00:00", "Z"),
         "decimal_value": "0.984",
         "duration": "-1 19:00:00",
         "float_value": "0.583",
@@ -195,7 +195,7 @@ def test_subclass_complicated_model():
         "subclass_name": "def",
         "pk": 2,
         "name": "abc",
-        "datetime": model.datetime.isoformat()[:-3],
+        "datetime": model.datetime.isoformat(timespec="milliseconds").replace("+00:00", "Z"),
         "float_value": "0.583",
         "decimal_value": "0.984",
         "uuid": str(model.uuid),
@@ -231,7 +231,7 @@ def test_model_with_timedelta(db):  # noqa: ARG001
             "decimal_value": None,
             "uuid": str(flavor.uuid),
             "date": str(now_dt.date()),
-            "datetime": now_dt.isoformat()[:-3],
+            "datetime": now_dt.isoformat(timespec="milliseconds").replace("+00:00", "Z"),
             "time": str(now_dt.time())[:-3],
             "duration": "-1 19:00:00",
             "pk": 8,