Drupal 8 core comes with more than 62,000 automated tests. This session we will dive deep into different types of testing available out-of-box. We also understand the behat world components and how can it be integrate with Drupal 8. Session overview:  1. Introduction (What/Why/How) 2. Types of testing    a. Unit    b. Kernel    c. Functional    d. Functional Javascript 3. Drupal core testing architecture 4. Behat a. Overview b. Integration c. Sample extension: i. Behat for Contact module: https://github.com/vijaycs85/drupal-core-extension ii. Behat with sitemap.xml: https://github.com/vijaycs85/sitemapextension 5. Code quality checker: https://github.com/vijaycs85/drupal-quality-checker 6. Lessons learned