Mocker calling itself

main.go

package main

import "fmt"

func main() {
	d := &MockDoer{}

	d.DoFn = func() {
		fmt.Println("Do")
		d.AlsoDo()
	}

	d.AlsoDoFn = func() {
		fmt.Println("AlsoDo")
	}

	var dd Doer = d

	dd.Do()
}

type Doer interface {
	Do()
	AlsoDo()
}

type MockDoer struct {
	DoFn     func()
	AlsoDoFn func()
}

func (d *MockDoer) Do() {
	d.DoFn()
}

func (d *MockDoer) AlsoDo() {
	d.AlsoDoFn()
}