Stubs

Stubs are test doubles which are closely related to mock objects but offer a subset of the functionality of mocks.

Stubs can stand in for other classes during testing and Behaviour-Driven Development in order to keep tests focussed only on the code being tested and not on any of its external dependencies. See "Independently testing models, views and controllers" for more information.

An example of a testing framework that provides a stubbing API is RSpec.