1 files changed, 39 insertions, 0 deletions
diff --git a/tests/test_utils/__init__.py b/tests/test_utils/__init__.py
index d232b72264..43898d8142 100644
--- a/tests/test_utils/__init__.py
+++ b/tests/test_utils/__init__.py
@@ -22,6 +22,13 @@ import warnings
 from asyncio import Future
 from typing import Any, Awaitable, Callable, TypeVar
 
+from mock import Mock
+
+import attr
+
+from twisted.python.failure import Failure
+from twisted.web.client import ResponseDone
+
 TV = TypeVar("TV")
 
 
@@ -80,3 +87,35 @@ def setup_awaitable_errors() -> Callable[[], None]:
     sys.unraisablehook = unraisablehook  # type: ignore
 
     return cleanup
+
+
+def simple_async_mock(return_value=None, raises=None) -> Mock:
+    # AsyncMock is not available in python3.5, this mimics part of its behaviour
+    async def cb(*args, **kwargs):
+        if raises:
+            raise raises
+        return return_value
+
+    return Mock(side_effect=cb)
+
+
+@attr.s
+class FakeResponse:
+    """A fake twisted.web.IResponse object
+
+    there is a similar class at treq.test.test_response, but it lacks a `phrase`
+    attribute, and didn't support deliverBody until recently.
+    """
+
+    # HTTP response code
+    code = attr.ib(type=int)
+
+    # HTTP response phrase (eg b'OK' for a 200)
+    phrase = attr.ib(type=bytes)
+
+    # body of the response
+    body = attr.ib(type=bytes)
+
+    def deliverBody(self, protocol):
+        protocol.dataReceived(self.body)
+        protocol.connectionLost(Failure(ResponseDone()))