Go Stubs: Interface

Interfaces for testing in Go. Ways to create stubs, without having to have a lot of exported interfaces in the application code. Instead, the developer using the package can create the necessary stubs.

References:

rakyll

playground

package main

import "fmt"

type acknowledger interface {
	Ack(sub string, id ...string) error
}

func Ack(sub string, id ...string) error {
	fmt.Printf("sub: %s\n",sub)
	for _,v := range id {
		fmt.Printf("i %s\n",v)
	}
	return nil
}

type P struct {}

func (p P) Ack(sub string, id ...string) error {
	fmt.Printf("sub: %s\n",sub)
	for _,v := range id {
		fmt.Printf("i %s\n",v)
	}
	return nil
}

func A(a acknowledger) {
	a.Ack("one","a","b")
}

func myNew() acknowledger {
	p := P{}
	return p
}

var acker acknowledger = myNew()


type mockClient struct{
	count int
}

func (c *mockClient) Ack(sub string, id ...string) error {
	c.count += 1
	return nil
}
func (c *mockClient) Count() int {
	return c.count
}

func main() {

	acker.Ack("a")

	c := mockClient{}
	acker = &c

	A(acker)
	A(acker)
	fmt.Printf(" %d\n",c.count)

}

This thought needs further development…