Jest Test runner working code

jest-test-runner-working-code.ts

import { runCLI } from 'jest-cli';
const path = require('path');

const jestTestRunnerForVSCodeE2E: ITestRunner = {
  run(testsRoot: string, reportTestResults: (error: Error, failures?: number) => void): void {
    const projectRootPath = path.join(process.cwd(), '../..');
    const config = path.join(projectRootPath, 'jest.e2e.config.js');

    runCLI({ config } as any, [projectRootPath])
      .then(jestCliCallResult => {
        reportTestResults(undefined, jestCliCallResult.results.numFailedTests);
      })
      .catch(errorCaughtByJestRunner => {
        reportTestResults(errorCaughtByJestRunner, 0);
      });
  }
};

module.exports = jestTestRunnerForVSCodeE2E;