Calabash enables you to write and execute automated acceptance tests of mobile apps. Calabash is cross-platform, supporting Android and iOS native apps. It is open source and free, and has a company, LessPainful, backing and developing it.

Calabash consists of libraries that enable test-code to programmatically interact with native and hybrid apps. The interaction consists of a number of end-user actions. Each action can be one of

Gestures

Touches or gestures (e.g., tap, swipe and rotate).

Assertions

For example: there should be a "Login" button or the web view should contain an "<h1>" element with the text "Hello".

Screenshots

screendump the current view on the current device model

Calabash could be compared to Selenium WebDriver. However, it is important to realize that interacting with a web app from a desktop computer is vastly different than interacting with a native app using a touch screen. Calabash provides APIs that are specialized to native apps running on touch screen devices.