feat: Update accessibility features in OrganizationChart component and tests

src/webparts/organizationChart/components/OrganizationChart.tsx

@@ -3,7 +3,7 @@ import { IOrganizationNode, IUserProfile } from '../OrganizationChartTypes';
 import styles from './OrganizationChart.module.scss';
 import { IOrganizationChartProps } from './IOrganizationChartProps';
 
-interface IOrganizationChartState {
+export interface IOrganizationChartState {
   collapsed: { [account: string]: boolean };
 }
 
@@ -39,7 +39,7 @@ export default class OrganizationChart extends React.Component<IOrganizationChar
     const hasChildren: boolean = node.children.length > 0;
     return (
       <li key={profile.accountName} role='treeitem' aria-level={level}
-        aria-expanded={hasChildren ? !collapsed : undefined}>
+        aria-selected={false} aria-expanded={hasChildren ? !collapsed : undefined}>
         <div className={styles.nodeWrap}>
           {this.renderPerson(profile)}
           {hasChildren && <button type='button' className={styles.toggle}
@@ -62,7 +62,7 @@ export default class OrganizationChart extends React.Component<IOrganizationChar
       <span className={styles.cardContent}>
         {this.props.showPictures && <span className={styles.photoWrap}>
           <span className={styles.initials} aria-hidden='true'>{this.initials(profile.displayName)}</span>
-          {profile.pictureUrl && <img className={styles.photo} src={profile.pictureUrl} alt=''
+          {profile.pictureUrl && <img className={styles.photo} src={profile.pictureUrl} alt='' role='presentation'
             onError={(event: React.SyntheticEvent<HTMLImageElement>): void => this.hideBrokenImage(event)} />}
         </span>}
         <span className={styles.personText}>