The two main functionalities of this package are creating mock objects
(functions) and selectively intercepting calls to a given function
that originate in some other function. It can be used with any testing
framework available for R. Mock objects can be injected with either
this package's own stub() function or a similar with_mock() facility
present in the 'testthat' package.

Homepage:
https://CRAN.R-project.org/package=mockery
