Tools for Mocking
From testthat
Provide tools for “mocking”, temporarily redefining a function so that it behaves differently during tests.
with_mocked_bindings()local_mocked_bindings()
Other alternatives:
mockery: https://github.com/r-lib/mockerymockr: https://krlmlr.github.io/mockr/httptest: https://enpiar.com/r/httptest/httptest2: https://enpiar.com/httptest2/webfakes: https://webfakes.r-lib.org