Another appoarch of fake type

fake-random.go

type Random interface {
	Number(min, max int) int
	String(char []byte) string
}

type FakeRandomPreparer struct {

}
func (f *FakeRandomPreparer) NumberAllAny() {

}

type FakeRandom struct {
	Prepare *FakeRandomPreparer
}

func (f FakeRandom) Number(min, max int) int {
	panic("implement me")
}

func (f FakeRandom) String(char []byte) string {
	panic("implement me")
}