Googletest Mocking (gMock) Framework


Google's framework for writing and using C++ mock classes. It can help you derive better designs of your system and write better tests.

It is inspired by:

and designed with C++'s specifics in mind.


  • provides a declarative syntax for defining mocks,
  • can define partial (hybrid) mocks, which are a cross of real and mock objects,
  • handles functions of arbitrary types and overloaded functions,
  • comes with a rich set of matchers for validating function arguments,
  • uses an intuitive syntax for controlling the behavior of a mock,
  • does automatic verification of expectations (no record-and-replay needed),
  • allows arbitrary (partial) ordering constraints on function calls to be expressed,
  • lets a user extend it by defining new matchers and actions.
  • does not use exceptions, and
  • is easy to learn and use.

Details and examples can be found here:

Please note that code under scripts/generator/ is from the cppclean project and under the Apache License, which is different from Google Mock's license.

Google Mock is a part of Google Test C++ testing framework and a subject to the same requirements.