userauth_example_test.go

package userauth_test

import (
	"errors"
	"fmt"
	"github.com/go-bumbu/userauth"
	"github.com/go-bumbu/userauth/userstore/staticusers"
)

func Example_usrauth_CanLogin() {

	// define static UserGetter
	u := []staticusers.User{
		{
			Id:      "demo",
			HashPw:  userauth.MustHashPw("demo"),
			Enabled: false,
		},
		{
			Id:      "admin",
			HashPw:  userauth.MustHashPw("admin"),
			Enabled: true,
		},
	}

	// use static UserGetter as mock user provider,
	// UserGetter can also be loaded from files with static.FromFile("my-file.yaml|json")
	users := staticusers.Users{Users: u}

	// create a login handler that will check user login
	loginHandler := userauth.LoginHandler{
		UserStore: &users,
	}

	// check if the user demo (from file) can log in
	isOK, _ := loginHandler.CanLogin("admin", "admin")
	fmt.Printf("user admin can login: %v\n", isOK)

	// check if the user demo can't log in since the account is disabled
	isOK, err := loginHandler.CanLogin("demo", "demo")
	switch {
	case errors.Is(err, userauth.ErrUserNotFound), errors.Is(err, userauth.ErrUserDisabled):
		// expected errors
	default:
		panicOnErr(err)
	}
	fmt.Printf("user demo can login: %v", isOK)

	// Output:
	// user admin can login: true
	// user demo can login: false
}

func panicOnErr(err error) {
	if err != nil {
		panic(err)
	}
}