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bus_test.go
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bus_test.go
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package hexago
import (
"fmt"
"github.com/google/uuid"
"reflect"
"testing"
"time"
)
const (
DoSthCmd = "DoSth"
DoSth2Cmd = "DoSth2"
SthHappenedEvent = "sth-happened"
)
var (
busAudit []string
cmdBus CmdBus
)
type User struct {
Identifier uuid.UUID
events []Event
}
func (u *User) DoSth() {
u.events = append(u.events, NewSthHappened("Sth"))
}
func (u *User) Id() uuid.UUID {
return u.Identifier
}
func (u *User) Pull() []Event {
e := u.events
u.events = make([]Event, 0)
return e
}
type DoSth struct {
SomeField string
AnOtherField int
}
type StaffRepo struct {
seen []AggRoot
}
func (r *StaffRepo) Persist(u User) {
r.seen = append(r.seen, &u)
}
func (r *StaffRepo) Seen() []AggRoot {
return r.seen
}
type DoSthHandler struct {
Repo *StaffRepo
}
func (d DoSthHandler) Handle(_ Cmd) (string, error) {
defer func() {
busAudit = append(busAudit, fmt.Sprintf("%T", d))
}()
u := User{Identifier: NewId()}
u.DoSth()
d.Repo.Persist(u)
return u.Identifier.String(), nil
}
func NewDoSth() Cmd {
return NewCmd(DoSthCmd, DoSth{
SomeField: "foo",
AnOtherField: 10,
})
}
type DoSth2 struct {
A string
B int
}
type DoSth2Handler struct {
}
func (c DoSth2Handler) Handle(_ Cmd) (string, error) {
defer func() {
busAudit = append(busAudit, fmt.Sprintf("%T", c))
}()
return "", nil
}
type SthHappened struct {
Reason string
}
func NewSthHappened(reason string) Event {
return Event{
Identifier: NewId(),
Name: SthHappenedEvent,
At: time.Now(),
Payload: SthHappened{Reason: reason},
}
}
type SthHappenedHandler struct {
}
func (s SthHappenedHandler) Handle(_ Event) {
defer func() {
busAudit = append(busAudit, fmt.Sprintf("%T", s))
}()
}
type SthHappenedHandler2 struct {
}
func (s SthHappenedHandler2) Handle(_ Event) {
defer func() {
busAudit = append(busAudit, fmt.Sprintf("%T", s))
}()
_, _ = cmdBus.Handle(NewCmd(DoSth2Cmd, DoSth2{A: "foo", B: 10}))
}
func createBus() {
cmdBag := NewCmdBag()
cmdBag.Add(DoSthCmd, func() CmdHandler {
return DoSthHandler{Repo: &StaffRepo{}}
})
cmdBag.Add(DoSth2Cmd, func() CmdHandler {
return DoSth2Handler{}
})
eventBag := NewEventBag()
eventBag.Add(SthHappenedEvent, func() EventHandler {
return SthHappenedHandler{}
})
eventBag.Add(SthHappenedEvent, func() EventHandler {
return SthHappenedHandler2{}
})
bus := NewInMemoryBus(cmdBag, eventBag)
cmdBus = &bus
}
func TestInMemoryBus_Handle(t *testing.T) {
createBus()
res, err := cmdBus.Handle(NewDoSth())
if err != nil {
t.Error(err)
}
if res == "" {
t.Error("did not expect empty string")
}
if len(busAudit) != 4 {
t.Errorf("expected len to be 4, got %d", len(busAudit))
}
}
func TestHasRepoField(t *testing.T) {
ds := DoSth{SomeField: "foo", AnOtherField: 10}
if hasRepoField(reflect.ValueOf(ds)) {
t.Error("expected false, got true")
}
h := DoSthHandler{Repo: &StaffRepo{}}
if !hasRepoField(reflect.ValueOf(h)) {
t.Error("expected false, got true")
}
}