Add first accessibility tests

test/common/ErrorHandler.test.tsx

@@ -1,7 +1,8 @@
-import { render, screen } from '@testing-library/react';
+import { screen } from '@testing-library/react';
 import { fromPartial } from '@total-typescript/shoehorn';
-import type { PropsWithChildren } from 'react';
+import type { PropsWithChildren, ReactNode } from 'react';
 import { ErrorHandler as BaseErrorHandler } from '../../src/common/ErrorHandler';
+import { checkAccessibility } from '../__helpers__/accessibility';
 import { renderWithEvents } from '../__helpers__/setUpTest';
 
 const ComponentWithError = () => {
@@ -13,13 +14,16 @@ describe('<ErrorHandler />', () => {
   const location = fromPartial<Window['location']>({ reload });
   const cons = fromPartial<Console>({ error: vi.fn() });
   const ErrorHandler = (props: PropsWithChildren) => <BaseErrorHandler console={cons} location={location} {...props} />;
+  const setUp = (children: ReactNode = 'Error') => renderWithEvents(<ErrorHandler>{children}</ErrorHandler>);
 
   beforeEach(() => {
     vi.spyOn(console, 'error').mockImplementation(() => {}); // Silence react errors
   });
 
+  it('passes a11y checks', () => checkAccessibility(setUp()));
+
   it('renders children when no error has occurred', () => {
-    render(<ErrorHandler><span>Foo</span></ErrorHandler>);
+    setUp(<span>Foo</span>);
 
     expect(screen.getByText('Foo')).toBeInTheDocument();
     expect(screen.queryByText('Oops! This is awkward :S')).not.toBeInTheDocument();
@@ -27,14 +31,14 @@ describe('<ErrorHandler />', () => {
   });
 
   it('renders error page when error has occurred', () => {
-    render(<ErrorHandler><ComponentWithError /></ErrorHandler>);
+    setUp(<ComponentWithError />);
 
     expect(screen.getByText('Oops! This is awkward :S')).toBeInTheDocument();
     expect(screen.getByRole('button')).toBeInTheDocument();
   });
 
   it('reloads page on button click', async () => {
-    const { user } = renderWithEvents(<ErrorHandler><ComponentWithError /></ErrorHandler>);
+    const { user } = setUp(<ComponentWithError />);
 
     expect(reload).not.toHaveBeenCalled();
     await user.click(screen.getByRole('button'));