add unit tests for UserSearchModal component from scratch

src/UserSearchModal.test.js

@@ -0,0 +1,27 @@
+import { screen, render } from '@folio/jest-config-stripes/testing-library/react';
+
+import UserSearchModal from './UserSearchModal';
+
+jest.mock('./UserSearchContainer', () => {
+  return jest.fn(() => <div>UserSearchContainer</div>);
+});
+
+describe('UserSearchModal', () => {
+  it('should display search label', () => {
+    render(<UserSearchModal />);
+
+    expect(screen.getByText('ui-plugin-find-user.searchFieldLabel')).toBeInTheDocument();
+  });
+
+  it('should render "UserSearchContainer"', () => {
+    expect(screen.getByText('UserSearchContainer')).toBeInTheDocument();
+  });
+
+  it('close modal on clicking close button', () => {
+    const button = screen.getByRole('button', { name: 'Dismiss modal' });
+    expect(button).toBeInTheDocument();
+
+    button.click();
+    expect(screen.getByText('UserSearchContainer')).not.toBeInTheDocument();
+  });
+});