grafana/public/app/core/components/PageActionBar/PageActionBar.test.tsx

import { render, screen } from '@testing-library/react';
import React from 'react';

import PageActionBar, { Props } from './PageActionBar';

const setup = (propOverrides?: object) => {
  const props: Props = {
    searchQuery: '',
    setSearchQuery: jest.fn(),
    target: '_blank',
    linkButton: { href: 'some/url', title: 'test' },
  };

  Object.assign(props, propOverrides);

  return render(<PageActionBar {...props} />);
};

describe('Render', () => {
  it('should render component', () => {
    setup();

    expect(screen.getByRole('textbox')).toBeInTheDocument();
    expect(screen.getByRole('link', { name: 'test' })).toBeInTheDocument();
    expect(screen.queryByRole('button', { name: 'Clear' })).not.toBeInTheDocument();
  });
  it('should render button when text is present', () => {
    setup({ searchQuery: 'test query' });

    expect(screen.getByRole('button', { name: 'Clear' })).toBeInTheDocument();
  });
});