Github.com/uber/mock

External

• https://pkg.go.dev/go.uber.org/mock/gomock

Internal

• Go Testing

mockgen

To generate the mock code at stdout:

mockgen <package_import_path> <InterfaceName>[,<InterfaceName>]

Programming Model

Setup Expectations

Define the Behavior of a Method

Configuring a mock to handle a specific method call.

someMock.EXPECT().SomeMethod(gomock.Any(), "some specific value").Return("some other value")

Note that if the method is not called at the end of the test, the mock will fail the test with:

missing call(s) to *mock_pkg.MockSomething.SomeMethod(...)
aborting test due to missing call(s)