Chore: Convert PanelHeaderCorner test to RTL (#51074)

* export props

* Convert PanelHeaderCorner test to RTL

* Update public/app/features/dashboard/dashgrid/PanelHeader/PanelHeaderCorner.test.tsx

Co-authored-by: Alex Khomenko <Clarity-89@users.noreply.github.com>

Co-authored-by: Alex Khomenko <Clarity-89@users.noreply.github.com>

.betterer.results

@@ -113,9 +113,6 @@ exports[`no enzyme tests`] = {
     "public/app/features/dashboard/dashgrid/DashboardGrid.test.tsx:2723773538": [
       [0, 35, 13, "RegExp match", "2409514259"]
     ],
-    "public/app/features/dashboard/dashgrid/PanelHeader/PanelHeaderCorner.test.tsx:2851646279": [
-      [0, 19, 13, "RegExp match", "2409514259"]
-    ],
     "public/app/features/datasources/DataSourceDashboards.test.tsx:1369048021": [
       [0, 19, 13, "RegExp match", "2409514259"]
     ],

public/app/features/dashboard/dashgrid/PanelHeader/PanelHeaderCorner.test.tsx

@@ -1,16 +1,26 @@
-import { shallow } from 'enzyme';
+import { render, screen } from '@testing-library/react';
 import React from 'react';
 
+import { selectors } from '@grafana/e2e-selectors';
+
 import { PanelModel } from '../../state';
 
-import { PanelHeaderCorner } from './PanelHeaderCorner';
+import PanelHeaderCorner, { Props } from './PanelHeaderCorner';
+
+const setup = () => {
+  const testPanel = new PanelModel({ title: 'test', description: 'test panel' });
+  const props: Props = {
+    panel: testPanel,
+  };
+  return render(<PanelHeaderCorner {...props} />);
+};
 
-describe('Render', () => {
+describe('Panel header corner test', () => {
   it('should render component', () => {
-    const panel = new PanelModel({});
-    const wrapper = shallow(<PanelHeaderCorner panel={panel} />);
-    const instance = wrapper.instance() as PanelHeaderCorner;
+    setup();
 
-    expect(instance.getInfoContent()).toBeDefined();
+    expect(
+      screen.getByRole('region', { name: selectors.components.Panels.Panel.headerCornerInfo('info') })
+    ).toBeInTheDocument();
   });
 });

public/app/features/dashboard/dashgrid/PanelHeader/PanelHeaderCorner.tsx

@@ -14,7 +14,7 @@ enum InfoMode {
   Links = 'Links',
 }
 
-interface Props {
+export interface Props {
   panel: PanelModel;
   title?: string;
   description?: string;