How to use the taiko.text function in taiko

(async () => {
  try {
    await openBrowserAndStartScreencast(
      path.join('captures', 'frames', 'frames.gif'),
    );
    await goto('http://localhost:3000/nested_frames');
    expect(
      await text('MIDDLE').exists(),
      'expected "MIDDLE" to exist on page',
    ).to.be.true;
    // taiko does not need to be told about frames, it automagically figures it out.

    //TODO: tinyMCE example
  } catch (e) {
    console.error(e);
    process.exitCode = 1;
  } finally {
    await closeBrowserAndStopScreencast();
  }
})();

(async () => {
  try {
    // example 1
    await openBrowserAndStartScreencast(
      path.join('captures', 'dynamic-pages', 'dynamic-pages.gif'),
    );
    await goto('http://localhost:3000/dynamic_loading');
    await click('Example 1:');
    await click('Start');
    // no waits, taiko implicitly listens and waits for the right state.
    expect(await text('Hello World').exists()).to.be.true;

    // example 2
    await goto('http://localhost:3000/dynamic_loading');
    await click('Example 2:');
    await click('Start');
    expect(await text('Hello World').exists()).to.be.true;
  } catch (e) {
    console.error(e);
    process.exitCode = 1;
  } finally {
    await closeBrowserAndStopScreencast();
  }
})();

(async () => {
  try {
    await openBrowserAndStartScreencast(
      path.join('captures', 'file-upload', 'file-upload.gif'),
    );
    await goto('http://localhost:3000/upload');
    await attach(
      path.join(__dirname, 'data', 'foo.txt'),
      fileField(above(button('Upload'))),
    );
    await click('Upload');
    var exists = await text('file uploaded!').exists();
    expect(exists).to.be.true;
  } catch (e) {
    console.error(e);
    process.exitCode = 1;
  } finally {
    await closeBrowserAndStopScreencast();
  }
})();

(async () => {
  try {
    await openBrowserAndStartScreencast(
      path.join('captures', 'basic-auth', 'basic-auth.gif'),
    );
    await goto('http://admin:admin@localhost:3000/basic_auth');
    expect(
      await text(
        'Congratulations! You must have the proper credentials.',
      ).exists(),
    ).to.be.true;
  } catch (e) {
    console.error(e);
    process.exitCode = 1;
  } finally {
    await closeBrowserAndStopScreencast();
  }
})();

(async () => {
  try {
    const url = 'http://localhost:3000/windows';
    await openBrowserAndStartScreencast(
      path.join('captures', 'windows', 'windows.gif'),
    );
    await goto(url);
    await click('click here');
    expect(await title()).to.eq('The Internet Express');
    await closeTab();
    expect(await currentURL()).to.eq(url);
    expect(await text('Opening a new Window').exists()).to.be.true;
  } catch (e) {
    console.error(e);
    process.exitCode = 1;
  } finally {
    await closeBrowserAndStopScreencast();
  }
})();