Add MockAsyncWebhook to mock `discord.Webhook` objects

I have added a mock type to mock `discord.Webhook` instances. Note
that the current type is specifically meant to mock webhooks that
use an AsyncAdaptor and therefore has AsyncMock/coroutine mocks for
the "maybe-coroutine" methods specified in the `discord.py` docs.

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/helpers.py b/tests/helpers.py
index 13852397f..b2daae92d 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -502,3 +502,24 @@ class MockReaction(CustomMockMixin, unittest.mock.MagicMock):
         self.message = kwargs.get('message', MockMessage())
         self.users = AsyncIteratorMock(kwargs.get('users', []))
 
+
+webhook_instance = discord.Webhook(data=unittest.mock.MagicMock(), adapter=unittest.mock.MagicMock())
+
+
+class MockAsyncWebhook(CustomMockMixin, unittest.mock.MagicMock):
+    """
+    A MagicMock subclass to mock Webhook objects using an AsyncWebhookAdapter.
+
+    Instances of this class will follow the specifications of `discord.Webhook` instances. For
+    more information, see the `MockGuild` docstring.
+    """
+
+    def __init__(self, **kwargs) -> None:
+        super().__init__(spec_set=webhook_instance, **kwargs)
+
+        # Because Webhooks can also use a synchronous "WebhookAdapter", the methods are not defined
+        # as coroutines. That's why we need to set the methods manually.
+        self.send = AsyncMock()
+        self.edit = AsyncMock()
+        self.delete = AsyncMock()
+        self.execute = AsyncMock()