Developing complex web applications without systematic strategies for its quality assurance will lead to maintenance nightmares. End-to-end testing, from the moment the implementation is being planned up to the stage of deployment, requires careful planning and a suitable set of tools. In this talk, the use of various tools to assist such testing strategies will be uncovered. This involves the use of scriptable headless page automation (PhantomJS, Zombie.js, Selenium) for fast smoke testing as part of the precommit process and for more comprehensive preflight checks in the continuous integration system. In addition, a wide spectrum of testing possibilities will be achieved with extra tools such as static code analyzer, full-stack execution logger, profiler, and code coverage/instrumentation.