grafana/public/app/features/explore/ErrorContainer.test.tsx

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

describe('ErrorContainer', () => {
  it('should render component and show message', () => {
    const props: ErrorContainerProps = {
      queryError: {
        data: {
          message: 'Error data message',
          error: 'Error data content',
        },
        message: 'Error message',
        status: 500,
        statusText: 'Error status text',
        refId: 'A',
      },
    };
    render(<ErrorContainer {...props} />);
    const alertEl = screen.getByRole('alert');
    expect(alertEl).toBeInTheDocument();
    expect(alertEl).toHaveTextContent(/query error/i);
    expect(alertEl).toHaveTextContent('Error message');
  });

  it('should render component and show message if message is in data only', () => {
    const props: ErrorContainerProps = {
      queryError: {
        data: {
          message: 'Error data message',
          error: 'Error data content',
        },
        status: 500,
        statusText: 'Error status text',
        refId: 'A',
      },
    };
    render(<ErrorContainer {...props} />);

    const alertEl = screen.getByRole('alert');
    expect(alertEl).toBeInTheDocument();
    expect(alertEl).toHaveTextContent(/query error/i);
    expect(alertEl).toHaveTextContent('Error data message');
  });

  it('should have hidden unknown error if prop is not passed in', () => {
    const props: ErrorContainerProps = {};
    render(<ErrorContainer {...props} />);

    const alertEl = screen.getByRole('alert', { hidden: true });
    expect(alertEl).toBeInTheDocument();
    expect(alertEl).toHaveTextContent('Unknown error');
  });
});