Cucumber is a software tool that computer programmers use for testing other software. It runs automated acceptance tests written in a behavior-driven development (BDD) style. Cucumber is written in the Ruby programming language. Cucumber projects are available for other platforms beyond Ruby. Some use Ruby Cucumber with a bridge into the target language (e.g. cuke4php and cuke4lua). Others use the Gherkin parser but implement everything else in the target language. Cucumber allows the execution of feature documentation written in business-facing text. Capybara, which is a part of the Cucumber testing framework, is an example of a web based test automation software.