test: added tests for list service

internal/domain/list_test.go

@@ -0,0 +1,84 @@
+package domain_test
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/robindittmar/dttmr-api/internal/domain"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+)
+
+type mockListRepo struct {
+	mock.Mock
+}
+
+func (m *mockListRepo) CreateList(ctx context.Context, name string, userIDs []string) (*domain.List, error) {
+	args := m.Called(ctx, name, userIDs)
+	var list *domain.List
+	if l := args.Get(0); l != nil {
+		list = l.(*domain.List)
+	}
+	return list, args.Error(1)
+}
+
+func TestListService_Create_Success(t *testing.T) {
+	expectedList := &domain.List{
+		ID:         "1",
+		Name:       "My List",
+		CreatedAt:  time.Now(),
+		ModifiedAt: time.Now(),
+	}
+
+	repo := new(mockListRepo)
+	repo.On("CreateList", mock.Anything, "My List", []string{"user1", "user2"}).Return(expectedList, nil)
+
+	service := domain.NewListService(repo)
+	list, err := service.Create(context.Background(), "My List", []string{"user1", "user2"})
+
+	require.NoError(t, err)
+	assert.Equal(t, expectedList, list)
+	repo.AssertExpectations(t)
+}
+
+func TestListService_Create_EmptyName(t *testing.T) {
+	repo := new(mockListRepo)
+	service := domain.NewListService(repo)
+
+	list, err := service.Create(context.Background(), "", []string{"user1"})
+
+	require.Error(t, err)
+	assert.EqualError(t, err, "list name must not be empty")
+	assert.Nil(t, list)
+	repo.AssertExpectations(t)
+}
+
+func TestListService_Create_EmptyUsers(t *testing.T) {
+	repo := new(mockListRepo)
+	service := domain.NewListService(repo)
+
+	list, err := service.Create(context.Background(), "My List", []string{})
+
+	require.Error(t, err)
+	assert.EqualError(t, err, "users must have at least one associated user")
+	assert.Nil(t, list)
+	repo.AssertExpectations(t)
+}
+
+func TestListService_Create_RepoError(t *testing.T) {
+	expectedErr := errors.New("database error")
+	repo := new(mockListRepo)
+	repo.On("CreateList", mock.Anything, "My List", []string{"user1"}).Return(nil, expectedErr)
+
+	service := domain.NewListService(repo)
+
+	list, err := service.Create(context.Background(), "My List", []string{"user1"})
+
+	require.Error(t, err)
+	assert.ErrorIs(t, err, expectedErr)
+	assert.Nil(t, list)
+	repo.AssertExpectations(t)
+}