테넌트 crud 테스트 코드 추가

backend/internal/handler/tenant_handler_test.go

@@ -66,10 +66,51 @@ func (m *MockTenantService) GetTenant(ctx context.Context, id string) (*domain.T
 	return args.Get(0).(*domain.Tenant), args.Error(1)
 }
 
+func (m *MockTenantService) ListTenants(ctx context.Context, limit, offset int, parentID string) ([]domain.Tenant, int64, error) {
+	args := m.Called(ctx, limit, offset, parentID)
+	return args.Get(0).([]domain.Tenant), args.Get(1).(int64), args.Error(2)
+}
+
 func (m *MockTenantService) SetKetoService(keto service.KetoService) {
 	m.Called(keto)
 }
 
+type MockUserRepoForHandler struct {
+	mock.Mock
+}
+
+func (m *MockUserRepoForHandler) Create(ctx context.Context, user *domain.User) error { return nil }
+func (m *MockUserRepoForHandler) Update(ctx context.Context, user *domain.User) error { return nil }
+func (m *MockUserRepoForHandler) Delete(ctx context.Context, id string) error         { return nil }
+func (m *MockUserRepoForHandler) FindByEmail(ctx context.Context, email string) (*domain.User, error) {
+	return nil, nil
+}
+func (m *MockUserRepoForHandler) FindByID(ctx context.Context, id string) (*domain.User, error) {
+	return nil, nil
+}
+func (m *MockUserRepoForHandler) FindByIDs(ctx context.Context, ids []string) ([]domain.User, error) {
+	return nil, nil
+}
+func (m *MockUserRepoForHandler) ListByTenant(ctx context.Context, tenantID string) ([]domain.User, error) {
+	return nil, nil
+}
+func (m *MockUserRepoForHandler) List(ctx context.Context, offset, limit int, search string, companyCode string) ([]domain.User, int64, error) {
+	return nil, 0, nil
+}
+func (m *MockUserRepoForHandler) CountByTenant(ctx context.Context, tenantID string) (int64, error) {
+	return 0, nil
+}
+func (m *MockUserRepoForHandler) CountByTenantIDs(ctx context.Context, tenantIDs []string) (map[string]int64, error) {
+	return nil, nil
+}
+func (m *MockUserRepoForHandler) CountByCompanyCodes(ctx context.Context, codes []string) (map[string]int64, error) {
+	args := m.Called(ctx, codes)
+	if args.Get(0) == nil {
+		return nil, args.Error(1)
+	}
+	return args.Get(0).(map[string]int64), args.Error(1)
+}
+
 func TestTenantHandler_CreateTenant(t *testing.T) {
 	app := fiber.New()
 	mockSvc := new(MockTenantService)
@@ -98,6 +139,47 @@ func TestTenantHandler_CreateTenant(t *testing.T) {
 	assert.Equal(t, "t1", got["id"])
 }
 
+func TestTenantHandler_ListTenants(t *testing.T) {
+	app := fiber.New()
+	mockSvc := new(MockTenantService)
+	mockUserRepo := new(MockUserRepoForHandler)
+
+	h := &TenantHandler{
+		Service:  mockSvc,
+		UserRepo: mockUserRepo,
+	}
+
+	app.Get("/tenants", h.ListTenants)
+
+	tenants := []domain.Tenant{
+		{ID: "t1", Name: "Tenant A", Slug: "slug-a"},
+		{ID: "t2", Name: "Tenant B", Slug: "slug-b"},
+	}
+	mockSvc.On("ListTenants", mock.Anything, 10, 0, "").Return(tenants, int64(2), nil)
+	mockUserRepo.On("CountByCompanyCodes", mock.Anything, []string{"slug-a", "slug-b"}).
+		Return(map[string]int64{"slug-a": 5, "slug-b": 10}, nil)
+
+	req := httptest.NewRequest("GET", "/tenants?limit=10&offset=0", nil)
+	resp, _ := app.Test(req)
+
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+
+	var res tenantListResponse
+	json.NewDecoder(resp.Body).Decode(&res)
+
+	assert.Equal(t, int64(2), res.Total)
+	assert.Len(t, res.Items, 2)
+
+	// Check if counts are mapped correctly
+	for _, item := range res.Items {
+		if item.Slug == "slug-a" {
+			assert.Equal(t, int64(5), item.MemberCount)
+		} else if item.Slug == "slug-b" {
+			assert.Equal(t, int64(10), item.MemberCount)
+		}
+	}
+}
+
 func TestTenantHandler_ApproveTenant(t *testing.T) {
 	app := fiber.New()
 	mockSvc := new(MockTenantService)