add optional supportUrl property

Signed-off-by: Emma Indal <emma.indahl@gmail.com>

packages/core-components/src/layout/ErrorPage/ErrorPage.test.tsx

@@ -42,4 +42,26 @@ describe('<ErrorPage/>', () => {
     expect(getByText(/a link/i)).toBeInTheDocument();
     expect(getByText(/a link/i)).toHaveAttribute('href', '/test');
   });
+
+  it('should render with default support url if supportUrl is not provided', async () => {
+    const { getByText } = await renderInTestApp(
+      <ErrorPage status="404" statusMessage="PAGE NOT FOUND"  />,
+    );
+    expect(
+      getByText(/looks like someone dropped the mic!/i),
+    ).toBeInTheDocument();
+    expect(getByText(/contact support/i)).toBeInTheDocument();
+    expect(getByText(/contact support/i)).toHaveAttribute('href', 'https://github.com/backstage/backstage/issues');
+  });
+
+  it('should override support url if supportUrl property is provided', async () => {
+    const { getByText } = await renderInTestApp(
+      <ErrorPage status="404" statusMessage="PAGE NOT FOUND" supportUrl='https://error-page-test-support-url.com' />,
+    );
+    expect(
+      getByText(/looks like someone dropped the mic!/i),
+    ).toBeInTheDocument();
+    expect(getByText(/contact support/i)).toBeInTheDocument();
+    expect(getByText(/contact support/i)).toHaveAttribute('href', 'https://error-page-test-support-url.com');
+  });
 });

packages/core-components/src/layout/ErrorPage/ErrorPage.tsx

@@ -28,6 +28,7 @@ interface IErrorPageProps {
   status: string;
   statusMessage: string;
   additionalInfo?: string | JSX.Element;
+  supportUrl?: string;
 }
 
 /** @public */
@@ -62,7 +63,7 @@ const useStyles = makeStyles<BackstageTheme>(
  *
  */
 export function ErrorPage(props: IErrorPageProps) {
-  const { status, statusMessage, additionalInfo } = props;
+  const { status, statusMessage, additionalInfo, supportUrl } = props;
   const classes = useStyles();
   const navigate = useNavigate();
   const support = useSupportConfig();
@@ -88,7 +89,7 @@ export function ErrorPage(props: IErrorPageProps) {
           <Link to="#" data-testid="go-back-link" onClick={() => navigate(-1)}>
             Go back
           </Link>
-          ... or please <Link to={support.url}>contact support</Link> if you
+          ... or please <Link to={supportUrl || support.url}>contact support</Link> if you
           think this is a bug.
         </Typography>
       </Grid>