This code checks if two variables, client and $, are defined, and if so, it creates a new Webdriver client instance and sends the result to the $ function. The code also catches any errors that occur during client creation and sends them to the $ function for handling.

Cell 14

if(typeof client !== 'undefined' && typeof $ !== 'undefined') {
    $.async();
    var client = createWebdriverClient('localhost', 4444)
        .then(r => $.sendResult(r))
        .catch(e => $.sendError(e));
}

// Import required modules and ensure they are properly initialized
import { createWebdriverClient } from './webdriver-client';
import { $ } from './webdriver-utils';

if (typeof client!== 'undefined' && typeof $!== 'undefined') {
  // Check if $.async method is available
  if ($.async!== undefined) {
    $.async();
  }

  // Create a new Webdriver Client instance and handle promises
  createWebdriverClient('localhost', 4444)
   .then((clientInstance) => {
      // Send the result of the client instance creation to $
      $.sendResult(clientInstance);
    })
   .catch((error) => {
      // Send the error to $ for handling
      $.sendError(error);
    });
}

// TODO: Consider adding a timeout for the client creation to prevent infinite waits
// TODO: Add logging or other error handling mechanisms to improve the robustness of the code

Code Breakdown

Conditional Statement

• Checks if two variables are defined:
  • client: A variable that stores a client object.
  • $: A variable that is likely a function or object.

Block Inside Conditional Statement

• If the variables are defined:
  1. Calls the async() method of the $ function.
  2. Creates a new Webdriver client instance on localhost at port 4444:
  • Uses the createWebdriverClient() function to create a new client.
  • Passes the result of the client creation to the then() method of a promise.
  3. Sends the result of the client creation to the $ function:
  • Uses the sendResult() method of the $ function to send the result.
  4. Catches any errors that occur during client creation:
  • Uses the catch() method of a promise to handle any errors.
  • Sends the error to the $ function:
    • Uses the sendError() method of the $ function to send the error.