From 926a001ef667219798c2d00563723f804f09a7b6 Mon Sep 17 00:00:00 2001
From: Jerel Miller <jerelmiller@gmail.com>
Date: Thu, 12 Dec 2024 17:26:28 -0700
Subject: [PATCH] Add polyfill for MessageChannel in getDataFromTree test

---
 config/jest.config.js                            |  5 +----
 src/react/ssr/__tests__/getDataFromTree.test.tsx | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/config/jest.config.js b/config/jest.config.js
index 29323d3da7..1e0d714b4a 100644
--- a/config/jest.config.js
+++ b/config/jest.config.js
@@ -29,10 +29,7 @@ const defaults = {
 const ignoreTSFiles = ".ts$";
 const ignoreTSXFiles = ".tsx$";
 
-const react19TestFileIgnoreList = [
-  ignoreTSFiles,
-  "src/react/ssr/__tests__/getDataFromTree.test.tsx",
-];
+const react19TestFileIgnoreList = [ignoreTSFiles];
 
 const react17TestFileIgnoreList = [
   ignoreTSFiles,
diff --git a/src/react/ssr/__tests__/getDataFromTree.test.tsx b/src/react/ssr/__tests__/getDataFromTree.test.tsx
index 54bc53b4ac..0d2f8e2936 100644
--- a/src/react/ssr/__tests__/getDataFromTree.test.tsx
+++ b/src/react/ssr/__tests__/getDataFromTree.test.tsx
@@ -1,4 +1,19 @@
 import React from "react";
+
+if (React.version.startsWith("19")) {
+  // react-dom/server uses MessageChannel in React 19
+  window.MessageChannel = jest.fn().mockImplementation(() => {
+    return {
+      port1: {
+        set onmessage(_cb: unknown) {},
+      },
+      port2: {
+        postMessage(_data: unknown) {},
+      },
+    };
+  });
+}
+
 import gql from "graphql-tag";
 import { DocumentNode } from "graphql";