Advanced features

The basics of creating, setting up and verifying mocks cover most tests. The following features help in the remaining cases:

Feature	Use it when you want to …
Protected members	set up or verify protected virtual members of a class mock
Static interface members	mock static abstract or static virtual interface members
Advanced callback features	control how often and when return values and callbacks apply
Monitor interactions	only verify the interactions within a scope, or reset the recorded interactions
Check for unexpected interactions	make sure every interaction was verified, or every setup was used
Scenarios	switch between sets of setups, for collaborators with an internal state

For example, scenarios let a dispenser with a Refill method behave differently before and after a refill:

dispenser.Mock.InScenario("empty").Setup.Refill(It.IsAny<int>())
    .Returns(true)
    .TransitionTo("loaded");
dispenser.Mock.InScenario("loaded").Setup.Dispense(It.IsAny<string>(), It.IsAny<int>())
    .Returns(true);