Cucumber is a BDD tool that aids in outside-in development by executing plain-text features/stories as automated acceptance tests. Written in conjunction with the stakeholder, these Cucumber “features” clearly articulate business value and also serve as a practical guide throughout the development process: by explicitly outlining the expected outcomes of various scenarios developers know both where to begin and when they are finished. This video presents the basic usage of Cucumber, primarily in the context of web applications, which will include a survey of the common tools used for in-memory and in-browser testing. Common questions and pitfalls that arise will also be discussed.