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// Copyright 2026 Mihna123 Software
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package user
import (
"errors"
"log/slog"
"os"
"testing"
"golang.org/x/crypto/bcrypt"
)
func TestMain(m *testing.M) {
slog.SetDefault(slog.New(slog.DiscardHandler))
os.Exit(m.Run())
}
func newTestUserService(t *testing.T) *Service {
t.Helper()
return &Service{repository: newEmptyRepository(), bcryptCost: bcrypt.MinCost}
}
func TestRegisterInputValidateFaultyData(t *testing.T) {
badInputs := getInvalidRegisterInputs()
for name, in := range badInputs {
t.Run(name, func(t *testing.T) {
err := in.validate()
if err == nil {
t.Errorf("bad input got through: %+v", in)
}
if !errors.Is(err, ErrInvalidInput) {
t.Errorf("unexpected error: got %v, want ErrInvalidInput", err)
}
})
}
}
func TestRegisterBadInput(t *testing.T) {
in := &RegisterInput{}
s := newTestUserService(t)
_, err := s.Register(in)
if err == nil {
t.Error("no error when registering with faulty input")
}
if !errors.Is(err, ErrInvalidInput) {
t.Errorf("unexpected error: got %v, want ErrInvalidInput", err)
}
}
func TestRegisterExistingUser(t *testing.T) {
badInputs := map[string]RegisterInput{
"existing username": {
Username: "johnsmith",
Email: "thisemaildoesnt@exist.com",
Phone: "123321",
Password: "22332233",
},
"existing email": {
Username: "thisusernamedoesntexist",
Email: "janedoe@email.com",
Phone: "123321",
Password: "22332233",
},
}
for name, in := range badInputs {
t.Run(name, func(t *testing.T) {
r := newEmptyRepository()
r.fill()
s := &Service{repository: r, bcryptCost: bcrypt.MinCost}
_, err := s.Register(&in)
if err == nil {
t.Error("existing user registered")
}
if !errors.Is(err, ErrUserExists) {
t.Errorf("unexpected error: got %v, want ErrUserExists", err)
}
})
}
}
func TestRegisterRepositoryError(t *testing.T) {
s := &Service{
repository: &RepositoryMock{err: errors.New("db down")},
bcryptCost: bcrypt.MinCost,
}
in := &RegisterInput{Username: "bob", Email: "b@b.com", Password: "thisissecure"}
_, err := s.Register(in)
if err == nil {
t.Error("register swallowed repository error")
}
if errors.Is(err, ErrUserExists) {
t.Error("repository failure reported as ErrUserExists")
}
}
func TestSuccessfulRegister(t *testing.T) {
s := newTestUserService(t)
in := &RegisterInput{
Username: "happyuser123",
Email: "happyuser@email.com",
Phone: "+381233232",
Password: "supersecretpassword1234",
}
usr, err := s.Register(in)
if err != nil {
t.Fatalf("register with good input failed: %+v", in)
}
err = bcrypt.CompareHashAndPassword([]byte(usr.passwordHash), []byte(in.Password))
if err != nil {
t.Errorf("hash and password compare error: %v", err)
}
}
func TestRegisterSameUserTwice(t *testing.T) {
s := newTestUserService(t)
in := &RegisterInput{
Username: "happyuser123",
Email: "happyuser@email.com",
Phone: "+381233232",
Password: "supersecretpassword1234",
}
if _, err := s.Register(in); err != nil {
t.Fatalf("first register failed: %v", err)
}
_, err := s.Register(in)
if err == nil {
t.Errorf("registered same user twice: %+v", in)
}
if !errors.Is(err, ErrUserExists) {
t.Errorf("unexpected error: got %v, want ErrUserExists", err)
}
}
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