TransferList.Toolbar implements toolbar pattern

.changeset/beige-lions-swim.md

@@ -0,0 +1,5 @@
+---
+'@itwin/itwinui-react': patch
+---
+
+`TransferList.Toolbar` implements the previously missing [toolbar pattern](https://www.w3.org/WAI/ARIA/apg/patterns/toolbar/), including the arrow-key navigation functionality.

.changeset/orange-cats-mix.md

@@ -0,0 +1,5 @@
+---
+'@itwin/itwinui-react': patch
+---
+
+`IconButton`s inside `TransferList.Toolbar` will now show tooltips on the right side by default to avoid obscuring adjacent buttons in the group. This placement can be changed using the `labelProps.placement` prop on the `IconButton`.

packages/itwinui-react/src/core/TransferList/TransferList.test.tsx

@@ -40,7 +40,21 @@ it('should render in its most basic state', () => {
   });
 });
 
-it('should handle keyboard navigation', () => {
+it('should render Toolbar in its most basic state', () => {
+  const { container } = render(
+    <TransferList>
+      <TransferList.Toolbar>
+        <Button />
+      </TransferList.Toolbar>
+    </TransferList>,
+  );
+
+  const toolbar = container.querySelector('.iui-transfer-list-toolbar');
+  expect(toolbar).toBeTruthy();
+  expect(toolbar).toHaveAttribute('role', 'toolbar');
+});
+
+it('should handle keyboard navigation in Listbox', () => {
   const { container } = render(
     <TransferList>
       <TransferList.ListboxWrapper>
@@ -105,7 +119,7 @@ it('should handle keyboard navigation', () => {
   });
 });
 
-it('should handle key presses', async () => {
+it('should handle key presses in Listbox', async () => {
   const mockedOnClick = vi.fn();
   render(
     <TransferList>

packages/itwinui-react/src/core/TransferList/TransferList.tsx

@@ -16,6 +16,7 @@ import type { PolymorphicForwardRefComponent } from '../../utils/index.js';
 import { List } from '../List/List.js';
 import { ListItem } from '../List/ListItem.js';
 import { Label } from '../Label/Label.js';
+import { ButtonGroup } from '../ButtonGroup/ButtonGroup.js';
 
 // ----------------------------------------------------------------------------
 // TransferListComponent
@@ -226,9 +227,20 @@ if (process.env.NODE_ENV === 'development') {
 // ----------------------------------------------------------------------------
 // TransferList.Toolbar component
 
-const TransferListToolbar = polymorphic.div('iui-transfer-list-toolbar', {
-  role: 'toolbar',
-});
+const TransferListToolbar = React.forwardRef((props, ref) => {
+  const { className, children, ...rest } = props;
+  return (
+    <ButtonGroup
+      role='toolbar'
+      ref={ref}
+      {...rest}
+      orientation='vertical'
+      className={cx('iui-transfer-list-toolbar', className)}
+    >
+      {children}
+    </ButtonGroup>
+  );
+}) as PolymorphicForwardRefComponent<'div', object>;
 if (process.env.NODE_ENV === 'development') {
   TransferListToolbar.displayName = 'TransferList.Toolbar';
 }

testing/e2e/app/routes/TransferList/route.tsx

@@ -0,0 +1,5 @@
+import { TransferListMainExample } from 'examples';
+
+export default function Page() {
+  return <TransferListMainExample />;
+}

testing/e2e/app/routes/TransferList/spec.ts

@@ -0,0 +1,56 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('toolbar pattern in TransferList.Toolbar', () => {
+  test('should support toolbar arrow-key keyboard navigation', async ({
+    page,
+  }) => {
+    await page.goto('/TransferList');
+    const listboxes = page.getByRole('listbox');
+    const toolbar = page.getByRole('toolbar');
+    const buttons = toolbar.first().locator('button');
+
+    await page.keyboard.press('Tab');
+    await expect(listboxes.first()).toBeFocused();
+
+    await page.keyboard.press('Tab');
+    await expect(buttons.nth(0)).toBeFocused();
+    await page.keyboard.press('ArrowDown');
+    await expect(buttons.nth(1)).toBeFocused();
+    await page.keyboard.press('ArrowDown');
+    await expect(buttons.nth(2)).toBeFocused();
+    await page.keyboard.press('ArrowDown');
+    await expect(buttons.nth(3)).toBeFocused();
+    await page.keyboard.press('ArrowDown');
+    await expect(buttons.nth(0)).toBeFocused();
+    await page.keyboard.press('ArrowUp');
+    await expect(buttons.nth(3)).toBeFocused();
+  });
+
+  test('should have only one tab stop and support Tab/Shift+Tab key navigation', async ({
+    page,
+  }) => {
+    await page.goto('/TransferList');
+    const listboxes = page.getByRole('listbox');
+    const toolbar = page.getByRole('toolbar');
+    const buttons = toolbar.first().locator('button');
+
+    await page.keyboard.press('Tab');
+    await expect(listboxes.first()).toBeFocused();
+
+    await page.keyboard.press('Tab');
+    await expect(buttons.first()).toBeFocused();
+
+    await page.keyboard.press('Tab');
+    await expect(listboxes.last()).toBeFocused();
+
+    await page.keyboard.down('Shift');
+    await page.keyboard.press('Tab');
+    await page.keyboard.up('Shift');
+    await expect(buttons.first()).toBeFocused();
+
+    await page.keyboard.down('Shift');
+    await page.keyboard.press('Tab');
+    await page.keyboard.up('Shift');
+    await expect(listboxes.first()).toBeFocused();
+  });
+});