Fix test

Author: FrederikBolding

packages/snaps-controllers/src/services/webview/WebViewMessageStream.test.ts

@@ -22,12 +22,12 @@ describe('WebViewMessageStream', () => {
     expect(await responsePromise).toBe(555);
 
     expect(mockWebViewA.injectJavaScript).toHaveBeenCalledWith(
-      `window.postMessage('eyJ0YXJnZXQiOiJiIiwiZGF0YSI6MTExfQ==')`,
+      `window.postMessage([123,34,116,97,114,103,101,116,34,58,34,98,34,44,34,100,97,116,97,34,58,34,83,89,78,34,125])`,
     );
 
     // Inject { target: "foo", data: 111 }
     mockWebViewA.injectJavaScript(
-      `window.postMessage('eyJ0YXJnZXQiOiJmb28iLCJkYXRhIjoxMTF9')`,
+      `window.postMessage([123,34,116,97,114,103,101,116,34,58,34,102,111,111,34,44,34,100,97,116,97,34,58,49,49,49,125])`,
     );
 
     const listener = jest.fn();

packages/snaps-controllers/src/test-utils/webview.ts

@@ -1,16 +1,16 @@
-import { base64ToBytes, bytesToString } from '@metamask/utils';
+import { bytesToString } from '@metamask/utils';
 
 import { WebViewMessageStream } from '../services/webview/WebViewMessageStream';
 
 /**
- * Parses the injected JS and returns the decoded base64 payload.
+ * Parses the injected JS and returns the JSON payload.
  *
  * @param js - The injected JS.
- * @returns The parsed base64 payload as a string.
+ * @returns The decoded JSON as a string.
  */
 export function parseInjectedJS(js: string) {
-  const base64 = js.slice(20, -2);
-  const bytes = base64ToBytes(base64);
+  const byteString = js.slice(19, -1);
+  const bytes = new Uint8Array(JSON.parse(byteString));
   return bytesToString(bytes);
 }