A piece of software called Cucumber facilitates behavior-driven development. Gherkin, an ordinary language parser, lies at the heart of the Cucumber BDD methodology. It enables the specification of expected software behaviours in a comprehensible language for users. Cucumber therefore permits feature documentation written in business-facing language to be executed. It is frequently employed for software testing. It executes behavior-driven development (BDD)-style automated acceptance tests.

Initially developed in the Ruby programming language, Cucumber was only utilised for Ruby testing as an add-on to the RSpec BDD framework. Thanks to its several implementations, Cucumber currently supports a wide range of programming languages, including Java and JavaScript. SpecFlow is a Cucumber to.NET port that has since been replaced by Reqnroll. Java is the foundation of this tutorial.