Group: Add GetMemberGroupAsStrings func

GraphClient.go

@@ -365,15 +365,15 @@ func (g *GraphClient) ListGroups(opts ...ListQueryOption) (Groups, error) {
 // You can specify the securityGroupsEnabled parameter to only return security group IDs.
 //
 // Reference: https://docs.microsoft.com/en-us/graph/api/directoryobject-getmembergroups?view=graph-rest-1.0&tabs=http
-func (g *GraphClient) getMemberGroups(identifier string, securityGroupsEnabeled bool, opts ...GetQueryOption) ([]string, error) {
-	resource := fmt.Sprintf("/users/%v/getMemberGroups", identifier)
+func (g *GraphClient) getMemberGroups(identifier string, securityEnabledOnly bool, opts ...GetQueryOption) ([]string, error) {
+	resource := fmt.Sprintf("/directoryObjects/%v/getMemberGroups", identifier)
 	var post struct {
 		SecurityEnabledOnly bool `json:"securityEnabledOnly"`
 	}
 	var marsh struct {
 		Groups []string `json:"value"`
 	}
-	post.SecurityEnabledOnly = securityGroupsEnabeled
+	post.SecurityEnabledOnly = securityEnabledOnly
 	bodyBytes, err := json.Marshal(post)
 	if err != nil {
 		return marsh.Groups, err

Group.go

@@ -76,6 +76,18 @@ func (g Group) ListTransitiveMembers(opts ...ListQueryOption) (Users, error) {
 	return marsh.Users, g.graphClient.makeGETAPICall(resource, compileListQueryOptions(opts), &marsh)
 }
 
+// GetMemberGroupsAsStrings returns a list of all group IDs the user is a member of.
+//
+// opts ...GetQueryOption - only msgraph.GetWithContext is supported.
+//
+// Reference: https://docs.microsoft.com/en-us/graph/api/directoryobject-getmembergroups?view=graph-rest-1.0&tabs=http
+func (g Group) GetMemberGroupsAsStrings(opts ...GetQueryOption) ([]string, error) {
+	if g.graphClient == nil {
+		return nil, ErrNotGraphClientSourced
+	}
+	return g.graphClient.getMemberGroups(g.ID, false, opts...) // securityEnabledOnly is not supported for Groups, see documentation / API-reference
+}
+
 // UnmarshalJSON implements the json unmarshal to be used by the json-library
 func (g *Group) UnmarshalJSON(data []byte) error {
 	tmp := struct {

Group_test.go

@@ -114,3 +114,40 @@ func TestGroup_ListTransitiveMembers(t *testing.T) {
 		})
 	}
 }
+
+func TestGroup_GetMemberGroupsAsStrings(t *testing.T) {
+	testGroup := GetTestGroup(t)
+
+	tests := []struct {
+		name    string
+		g       Group
+		opts    []GetQueryOption
+		wantErr bool
+	}{
+		{
+			name:    "Test group func GetMembershipGroupsAsStrings",
+			g:       testGroup,
+			wantErr: false,
+		}, {
+			name:    "Test group func GetMembershipGroupsAsStrings - no securityGroupsEnabeledF",
+			g:       testGroup,
+			wantErr: false,
+		},
+		{
+			name:    "Group not initialized by GraphClient",
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := tt.g.GetMemberGroupsAsStrings(tt.opts...)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Group.GetMemberGroupsAsStrings() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !tt.wantErr && len(got) == 0 {
+				t.Errorf("Group.GetMemberGroupsAsStrings() = %v, len(%d), want at least one value", got, len(got))
+			}
+		})
+	}
+}