change test to string format to compare to milisecond

tests/test_inheritance_mixins.py

@@ -57,7 +57,6 @@ def create_test_database():
 
 def test_field_redefining_raises_error():
     with pytest.raises(ModelDefinitionError):
-
         class WrongField(ormar.Model, DateFieldsMixins):  # pragma: no cover
             class Meta(ormar.ModelMeta):
                 tablename = "wrongs"
@@ -78,7 +77,6 @@ def test_field_redefining_in_second_raises_error():
         id: int = ormar.Integer(primary_key=True)
 
     with pytest.raises(ModelDefinitionError):
-
         class WrongField(ormar.Model, DateFieldsMixins):  # pragma: no cover
             class Meta(ormar.ModelMeta):
                 tablename = "wrongs"
@@ -89,6 +87,12 @@ def test_field_redefining_in_second_raises_error():
             created_date: datetime.datetime = ormar.DateTime()
 
 
+def round_date_to_seconds(date: datetime.datetime) -> datetime.datetime:
+    if date.microsecond >= 500000:
+        date = date + datetime.timedelta(seconds=1)
+    return date.replace(microsecond=0)
+
+
 @pytest.mark.asyncio
 async def test_fields_inherited_from_mixin():
     async with db:
@@ -122,15 +126,13 @@ async def test_fields_inherited_from_mixin():
 
             sub2 = (
                 await Subject.objects.select_related("category")
-                .order_by("-created_date")
-                .exclude_fields("updated_date")
-                .get()
+                    .order_by("-created_date")
+                    .exclude_fields("updated_date")
+                    .get()
             )
-            assert sub2.created_date.strftime("%Y-%m-%d %H:%M:%S") == sub.created_date.strftime("%Y-%m-%d %H:%M:%S")
+            assert sub2.created_date == round_date_to_seconds(sub.created_date)
             assert sub2.category.updated_date is not None
-            assert sub2.category.created_date.strftime(
-                "%Y-%m-%d %H:%M:%S"
-            ) == cat.created_date.strftime("%Y-%m-%d %H:%M:%S")
+            assert sub2.category.created_date == round_date_to_seconds(cat.created_date)
             assert sub2.updated_date is None
             assert sub2.category.created_by == "Sam"
             assert sub2.category.updated_by == cat.updated_by