ducky/devices: memstore_test.go annotate

Separate out StorerFactory into its own interface. We had previously included a Factory and Destroy method in the Storer interface, but it makes more sense to separate those out into a StorerFactory interface. This lets us avoid the impression that we're using the same instance of a Storer for every test, separates the test methods away from the methods that are actually used in prod, and hides them from Godoc. What's not to like?

paddy@4	1 package devices
paddy@4	2
paddy@9	3 import (
paddy@9	4 "fmt"
paddy@9	5
paddy@9	6 "golang.org/x/net/context"
paddy@9	7 )
paddy@9	8
paddy@4	9 func init() {
paddy@9	10 storerFactories = append(storerFactories, MemstoreFactory{})
paddy@4	11 }
paddy@9	12
paddy@9	13 type MemstoreFactory struct {
paddy@9	14 }
paddy@9	15
paddy@9	16 func (m MemstoreFactory) NewStorer(ctx context.Context) (Storer, error) {
paddy@9	17 return NewMemstore(), nil
paddy@9	18 }
paddy@9	19
paddy@9	20 func (m MemstoreFactory) TeardownStorer(storer Storer, ctx context.Context) error {
paddy@9	21 memstorer, ok := storer.(*Memstore)
paddy@9	22 if !ok {
paddy@9	23 return fmt.Errorf("Storer was not a *Memstore, was a %T", storer)
paddy@9	24 }
paddy@9	25 memstorer.devices = nil
paddy@9	26 return nil
paddy@9	27 }

ducky/devices

ducky/devices/memstore_test.go