Time is a dependency like any other, so use dependency inversion. (Which I think is advocated by TFA’s approaches 4 and 5.)
Define an interface for timers, which is injected into the object that depends on time. Use a wrapper implementation over the usual timer for the real code; and a simple implementation, which can be controlled parametrically, in the tests.
Define an interface for timers, which is injected into the object that depends on time. Use a wrapper implementation over the usual timer for the real code; and a simple implementation, which can be controlled parametrically, in the tests.