fileDownload.spec.ts

it('Verify on click of download PDF, PDF should be downloaded', async () => {
    driver.navigate('url')
    reporter.startStep('Clicking on download PDF button');
    await topicPage.clickDownloadPDF();
    await studentDriver.pause(20000); // Download take some time, you can add code to wait until file exist
    const isPresent = DirectoryUtils.validateFileIsPresentInDirectory(filePath);
    chaiExpect(isPresent,
      'Expected the presence of file, but not found').to.be.true;
  });