Don't define class-scoped fixtures as instance methods

This is deprecated as of pytest 9.1; see
https://docs.pytest.org/en/stable/deprecations.html#class-scoped-fixture-as-instance-method.

Author: cjwatson

tests/unit/templating/test_media_types_finders.py

@@ -7,18 +7,21 @@
 
 class TestMediaTypes:
     @pytest.fixture(scope="class")
-    def spec(self):
+    @classmethod
+    def spec(cls):
         return {
             "application/json": {"schema": {"type": "object"}},
             "text/*": {"schema": {"type": "object"}},
         }
 
     @pytest.fixture(scope="class")
-    def content(self, spec):
+    @classmethod
+    def content(cls, spec):
         return SchemaPath.from_dict(spec)
 
     @pytest.fixture(scope="class")
-    def finder(self, content):
+    @classmethod
+    def finder(cls, content):
         return MediaTypeFinder(content)
 
     @pytest.mark.parametrize(

tests/unit/templating/test_responses_finders.py

@@ -8,7 +8,8 @@
 
 class TestResponses:
     @pytest.fixture(scope="class")
-    def spec(self):
+    @classmethod
+    def spec(cls):
         return {
             "200": mock.sentinel.response_200,
             "299": mock.sentinel.response_299,
@@ -17,11 +18,13 @@ def spec(self):
         }
 
     @pytest.fixture(scope="class")
-    def responses(self, spec):
+    @classmethod
+    def responses(cls, spec):
         return SchemaPath.from_dict(spec)
 
     @pytest.fixture(scope="class")
-    def finder(self, responses):
+    @classmethod
+    def finder(cls, responses):
         return ResponseFinder(responses)
 
     def test_default(self, finder, responses):