From f2cb70b1e05f79772942985850c7d3f0219d8109 Mon Sep 17 00:00:00 2001
From: Ashley Harrison <ashley.harrison@grafana.com>
Date: Tue, 16 Dec 2025 12:04:11 +0000
Subject: [PATCH] add MessageChannel mock to grafana-plugin-configs

---
 .../grafana-plugin-configs/jest/jest-setup.js    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/packages/grafana-plugin-configs/jest/jest-setup.js b/packages/grafana-plugin-configs/jest/jest-setup.js
index 05a2b03634c..d0506f592a7 100644
--- a/packages/grafana-plugin-configs/jest/jest-setup.js
+++ b/packages/grafana-plugin-configs/jest/jest-setup.js
@@ -84,3 +84,19 @@ global.ResizeObserver = class ResizeObserver {
     this.#isObserving = false;
   }
 };
+
+global.MessageChannel = jest.fn().mockImplementation(() => {
+  let onmessage;
+  return {
+    port1: {
+      set onmessage(cb) {
+        onmessage = cb;
+      },
+    },
+    port2: {
+      postMessage: (data) => {
+        onmessage?.({ data });
+      },
+    },
+  };
+});