mocking

type FakeClock struct {
	// Value is the embedded time value. This value is advanced
	// by calling Sleep().
	Value time.Time
}

type FakePrinter struct {
	Builder strings.Builder
}

type IClock interface {
	Now() time.Time
	Sleep(d time.Duration)
}

type IPrinter interface {
	PrintMessageln(a ...interface{})
	PrintMessagef(format string, a ...interface{})
	PrintOutputln(a ...interface{})
}

type RealClock struct{}

type RealPrinter struct{}