1 files changed, 10 insertions, 0 deletions
diff --git a/testing/web-platform/tests/tools/wave/data/event_listener.py b/testing/web-platform/tests/tools/wave/data/event_listener.py
new file mode 100644
index 0000000000..c4b98653e1
--- /dev/null
+++ b/testing/web-platform/tests/tools/wave/data/event_listener.py
@@ -0,0 +1,10 @@
+# mypy: allow-untyped-defs
+
+class EventListener:
+    def __init__(self, dispatcher_token):
+        super().__init__()
+        self.dispatcher_token = dispatcher_token
+        self.token = None
+
+    def send_message(self, message):
+        raise Exception("Client.send_message(message) not implemented!")