test: improve readabilty of service worker console log (#1470)

Author: iccicci

packages/e2e-tests/src/utils/consoleManager.ts

@@ -41,13 +41,8 @@ export class ConsoleManager {
 
   getLogs = async (): Promise<ConsoleLogEntry[]> => ConsoleManager.capturedLogs;
 
-  getLogsAsString = async (): Promise<string | undefined> => {
-    let logs;
-    for (const log of ConsoleManager.capturedLogs) {
-      logs = `${logs} ${JSON.stringify(log)}`;
-    }
-    return logs;
-  };
+  getLogsAsString = async (): Promise<string | undefined> =>
+    ConsoleManager.capturedLogs.map(({ text }) => text).join('\n');
 
   closeOpenedCdpSessions = async (): Promise<void> => {
     await this.clearLogs();