package user

import (
	"testing"

	"gorm.io/gorm"
)

func TestUserTableName(t *testing.T) {
	var u User
	if got := u.TableName(); got != "users" {
		t.Fatalf("unexpected table name: %s", got)
	}
}

func TestUserBeforeCreate(t *testing.T) {
	t.Run("generates id when empty", func(t *testing.T) {
		u := &User{}
		if err := u.BeforeCreate(&gorm.DB{}); err != nil {
			t.Fatalf("BeforeCreate error: %v", err)
		}
		if len(u.ID) != 16 {
			t.Fatalf("expected generated 16-byte ID, got %d", len(u.ID))
		}
	})

	t.Run("keeps existing id", func(t *testing.T) {
		existing := []byte("1234567890abcdef")
		u := &User{ID: append([]byte(nil), existing...)}
		if err := u.BeforeCreate(&gorm.DB{}); err != nil {
			t.Fatalf("BeforeCreate error: %v", err)
		}
		if string(u.ID) != string(existing) {
			t.Fatalf("expected existing id to stay unchanged")
		}
	})
}