stub topic
spy
Clojure/ClojureScript library for stubs, spies and mocks.
mockery
Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succin...
sinon
Test spies, stubs and mocks for JavaScript.
OHHTTPStubs
Stub your network requests easily! Test your apps with fake network data and custom response time, response code and headers!
typeshed
Collection of library stubs for Python, with static types
mockit
A tool to quickly mock out end points, setup delays and more...
Cuckoo
Boilerplate-free mocking framework for Swift!
mocha
Mocha is a mocking and stubbing library for Ruby
ts-mockito
Mocking library for TypeScript