[4.2.x] Refs #34342 -- Added tests for handling sync streaming responses by test client.

Co-authored-by: Carlton Gibson <carlton.gibson@noumenal.es>

Backport of bfb8fda3e6 from main

tests/admin_views/test_actions.py

@@ -253,7 +253,7 @@ class AdminActionsTest(TestCase):
         response = self.client.post(
             reverse("admin:admin_views_externalsubscriber_changelist"), action_data
         )
-        content = b"".join(response.streaming_content)
+        content = b"".join(list(response))
         self.assertEqual(content, b"This is the content of the file")
         self.assertEqual(response.status_code, 200)
 

tests/handlers/tests.py

@@ -171,7 +171,7 @@ class SignalsTests(SimpleTestCase):
     def test_request_signals_streaming_response(self):
         response = self.client.get("/streaming/")
         self.assertEqual(self.signals, ["started"])
-        self.assertEqual(b"".join(response.streaming_content), b"streaming content")
+        self.assertEqual(b"".join(list(response)), b"streaming content")
         self.assertEqual(self.signals, ["started", "finished"])
 
 
@@ -248,6 +248,11 @@ class HandlerRequestTests(SimpleTestCase):
             ):
                 self.client.get(url)
 
+    def test_streaming(self):
+        response = self.client.get("/streaming/")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(b"".join(list(response)), b"streaming content")
+
 
 class ScriptNameTests(SimpleTestCase):
     def test_get_script_name(self):
@@ -312,3 +317,15 @@ class AsyncHandlerRequestTests(SimpleTestCase):
         )
         with self.assertRaisesMessage(ValueError, msg):
             await self.async_client.get("/unawaited/")
+
+    async def test_sync_streaming(self):
+        response = await self.async_client.get("/streaming/")
+        self.assertEqual(response.status_code, 200)
+        msg = (
+            "StreamingHttpResponse must consume synchronous iterators in order to "
+            "serve them asynchronously. Use an asynchronous iterator instead."
+        )
+        with self.assertWarnsMessage(Warning, msg):
+            self.assertEqual(
+                b"".join([chunk async for chunk in response]), b"streaming content"
+            )

tests/view_tests/tests/test_static.py

@@ -40,9 +40,10 @@ class StaticTests(SimpleTestCase):
     def test_chunked(self):
         "The static view should stream files in chunks to avoid large memory usage"
         response = self.client.get("/%s/%s" % (self.prefix, "long-line.txt"))
-        first_chunk = next(response.streaming_content)
+        response_iterator = iter(response)
+        first_chunk = next(response_iterator)
         self.assertEqual(len(first_chunk), FileResponse.block_size)
-        second_chunk = next(response.streaming_content)
+        second_chunk = next(response_iterator)
         response.close()
         # strip() to prevent OS line endings from causing differences
         self.assertEqual(len(second_chunk.strip()), 1449)