How do I implement a retry mechanism for fetching a bearer token in global setup or beforeAll hook in Playwright Test?

Answer

Implementing a Retry Mechanism for Fetching Bearer Token

To implement a retry mechanism in @playwright/test, you can use a try-catch block with a loop for retries. Here's a TypeScript example of how to do this in a beforeAll hook:

import { test } from '@playwright/test';

const MAX_RETRIES = 3;
const RETRY_DELAY = 1000;

async function fetchBearerToken(): Promise<string> {
  // Your implementation for fetching the bearer token
}

async function fetchTokenWithRetry(): Promise<string> {
  let retries = 0;
  while (retries < MAX_RETRIES) {
    try {
      const token = await fetchBearerToken();
      return token;
    } catch (error) {
      console.error(`Fetch attempt ${retries + 1} failed: ${error.message}`);
      retries++;
      if (retries < MAX_RETRIES) {
        await new Promise(resolve => setTimeout(resolve, RETRY_DELAY));
      }
    }
  }
  throw new Error('Failed to fetch bearer token after maximum retries');
}

test.beforeAll(async ({}, use) => {
  const token = await fetchTokenWithRetry();
  use({ token });
});

test('example test', async ({ token }) => {
  // Your test implementation using the fetched token
});

In this example, the fetchTokenWithRetry function attempts to fetch the bearer token using the fetchBearerToken function. If it fails, it retries up to MAX_RETRIES times with a delay of RETRY_DELAY milliseconds between each attempt.

Remember that adding retries may not always be the best solution, depending on the cause of the failure. If there's an issue with network connectivity or server availability, retries might not help and could prolong test execution times unnecessarily.