Add endpoint to lists invited groups of a project

projects.go

@@ -1139,6 +1139,35 @@ func (s *ProjectsService) DeleteProject(pid interface{}, options ...RequestOptio
 	return s.client.Do(req, nil)
 }
 
+// ListProjectInvidedGroupOptions represents the available ListProjectsInvitedGroups() options.
+//
+// GitLab API docs: https://docs.gitlab.com/ee/api/projects.html#list-a-projects-invited-groups
+type ListProjectInvidedGroupOptions struct {
+	ListOptions
+	Search               *string           `url:"search,omitempty" json:"search,omitempty"`
+	SharedMinAccessLevel *AccessLevelValue `url:"shared_min_access_level,omitempty" json:"shared_min_access_level,omitempty"`
+	Relation 			 []string    	   `url:"relation,omitempty" json:"relation,omitempty"`
+	WithCustomAttributes bool 			   `url:"with_custom_attributes,omitempty" json:"with_custom_attributes,omitempty"`
+}
+
+// ListProjectsInvitedGroups lists invited groups of a project
+//
+// GitLab API docs: https://docs.gitlab.com/ee/api/projects.html#list-a-projects-invited-groups
+func (s *ProjectsService) ListProjectsInvitedGroups(pid interface{}, opt *ListProjectInvidedGroupOptions, options ...RequestOptionFunc) (*Response, error) {
+	project, err := parseID(pid)
+	if err != nil {
+		return nil, err
+	}
+	u := fmt.Sprintf("projects/%s/invited_groups", PathEscape(project))
+
+	req, err := s.client.NewRequest(http.MethodGet, u, opt, options)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(req, nil)
+}
+
 // ShareWithGroupOptions represents options to share project with groups
 //
 // GitLab API docs: https://docs.gitlab.com/ee/api/projects.html#share-project-with-group

projects_test.go

@@ -647,6 +647,21 @@ func TestListProjectForks(t *testing.T) {
 	}
 }
 
+func TestListProjectsInvitedGroups(t *testing.T) {
+	mux, client := setup(t)
+
+	mux.HandleFunc("/api/v4/projects/1/invited_groups", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodGet)
+	})
+
+	opt := &ListProjectInvidedGroupOptions{}
+
+	_, err := client.Projects.ListProjectsInvitedGroups(1, opt)
+	if err != nil {
+		t.Errorf("Projects.ListProjectsInvitedGroups returned error: %v", err)
+	}
+}
+
 func TestShareProjectWithGroup(t *testing.T) {
 	mux, client := setup(t)