func TestUser_SignUp_failsIfUserHasSignedUpAlready(t *testing.T) {
password := ess.Password()
password.UnmarshalText([]byte("password"))
history := []*ess.Event{
ess.NewEvent("user.signed-up").
Add("username", "test-user").
Add("password", password.String()).
Add("email", "*****@*****.**").
Add("name", "John Doe"),
}
user := NewUser("username")
for _, event := range history {
user.HandleEvent(event)
}
err := user.SignUp("Jane Doe", "*****@*****.**", password.String())
if err == nil {
t.Fatal("Expected an error")
}
verr, ok := err.(*ess.ValidationError)
if !ok {
t.Fatalf("err.(type) = %T; want %T", err, verr)
}
if got, want := len(verr.Errors["username"]), 1; got != want {
t.Errorf(`len(verr.Errors["username"]) = %v; want %v`, got, want)
}
if got, want := verr.Errors["username"][0], "not_unique"; got != want {
t.Errorf(`verr.Errors["username"][0] = %v; want %v`, got, want)
}
}
package main
import (
"fmt"
"log"
"net/http"
"github.com/dhamidi/ess"
)
var SignUp = ess.NewCommandDefinition("sign-up").
Id("username", ess.Id()).
Field("name", ess.TrimmedString()).
Field("email", ess.EmailAddress()).
Field("password", ess.Password()).
Target(NewUserFromCommand)
func NewUserFromCommand(command *ess.Command) ess.Aggregate {
return NewUser(command.Get("username").String())
}
type User struct {
id string
events ess.EventPublisher
signedUp bool
}
func NewUser(username string) *User {
return &User{
id: username,
}