backend: 개인 테넌트 자동 생성 시 슬러그 길이 초과로 인한 가입 503 오류 원천 해결 코드 반영 (#1183)

backend/internal/handler/tenant_assignment_policy.go

@@ -135,6 +135,9 @@ func createPersonalTenantForUser(ctx context.Context, tenantService service.Tena
 		normalizedEmail = "user"
 	}
 	slug := "personal-" + strings.ReplaceAll(uuid.NewString(), "-", "")
+	if len(slug) > 32 {
+		slug = slug[:32]
+	}
 	tenant, err := tenantService.RegisterTenant(
 		ctx,
 		fmt.Sprintf("Personal - %s", normalizedEmail),

backend/internal/handler/tenant_assignment_policy_test.go

@@ -0,0 +1,49 @@
+package handler
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"baron-sso-backend/internal/domain"
+	"baron-sso-backend/internal/utils"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+)
+
+func TestCreatePersonalTenantForUser_SlugLength(t *testing.T) {
+	mockTenantService := &MockTenantService{}
+	ctx := context.Background()
+
+	var capturedSlug string
+	mockTenantService.On(
+		"RegisterTenant",
+		ctx,
+		"Personal - user@example.com",
+		mock.AnythingOfType("string"),
+		domain.TenantTypePersonal,
+		"Automatically provisioned personal tenant",
+		[]string(nil),
+		(*string)(nil),
+		"",
+	).Run(func(args mock.Arguments) {
+		capturedSlug = args.String(2)
+	}).Return(&domain.Tenant{
+		ID:   "personal-tenant-id",
+		Slug: "personal-slug",
+		Name: "Personal - user@example.com",
+	}, nil)
+
+	tenant, err := createPersonalTenantForUser(ctx, mockTenantService, "user@example.com")
+	assert.NoError(t, err)
+	assert.NotNil(t, tenant)
+
+	// Ensure the generated slug is strictly 32 characters or less
+	assert.LessOrEqual(t, len(capturedSlug), 32)
+	assert.True(t, strings.HasPrefix(capturedSlug, "personal-"))
+
+	// Ensure that the captured slug actually passes ValidateSlug!
+	valid, msg := utils.ValidateSlug(capturedSlug)
+	assert.True(t, valid, "Slug must be valid: "+msg)
+}