e2e retry blog post - initial retry script

run_tests_with_retries.js

// run_tests_with_retries.js
import { runCLI } from 'jest';
import jestConfig from './jest.config';

const NUM_RETRIES = 3;

async function runTestsAndRetry(jestConfig, retriesRemaining) { 
  const { results } = await runCLI(jestConfig, ['e2e/test']);

  // If there were no failures or we're out of retries, return
  if (!results.numFailedTests && !results.numFailedTestSuites) {
    return Promise.resolve();
  }
  if (retriesRemaining === 1) {
    return Promise.reject(new Error('Out of retries. Some tests are still failing.'));
  }

  // Compile a list of the test suites that failed and tell Jest to only run those files next time
  const failedTestPaths = results.testResults
    .filter((testResult) => testResult.numFailingTests > 0 || testResult.failureMessage)
    .map((testResult) => testResult.testFilePath);
  jestConfig.testMatch = failedTestsPaths;
  
  // Decrement retries remaining and retry
  retriesRemaining = retriesRemaining - 1;
  console.log(`Retrying failed tests. ${retriesRemaining} attempts remaining.`);
  return await runTestsAndRetry(jestConfig, retriesRemaining);
}

runTestsAndRetry(jestConfig, NUM_RETRIES);

You did not get my question.
The above piece of code will not compile at all.
failedTestsPaths is an undefined variable. It should be failedTestPaths not failedTestsPaths (look for the plural in Test(s))