How can I improve test coverage in my React app using React Testing Library?

How can I improve test coverage in my React app using React Testing Library?

To improve test coverage, start by identifying critical components and writing unit tests for them using React Testing Library.

What types of tests should I focus on first?

Focus on unit tests for individual components, integration tests for component interactions, and end-to-end tests for user flows.

Can you give me an example of a unit test?

Sure! Here's a simple example:

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

test('renders learn react link', () => {
  render(<MyComponent />);
  const linkElement = screen.getByText(/learn react/i);
  expect(linkElement).toBeInTheDocument();
});

How do I measure my test coverage?

You can measure test coverage by using tools like Jest with the --coverage flag, which provides a detailed report.