What is Svelte Testing Library and how do I use it?

What is Svelte Testing Library and how do I use it?

Svelte Testing Library is a lightweight testing utility for Svelte components, built on top of Testing Library. It helps you test your components in a way that resembles how users interact with them.

Can you give me an example of a simple test using Svelte Testing Library?

Sure! Here's a basic example:

import { render, fireEvent } from '@testing-library/svelte';
import MyComponent from './MyComponent.svelte';

test('it shows the correct text when button is clicked', async () => {
  const { getByText } = render(MyComponent);
  const button = getByText('Click me');
  await fireEvent.click(button);
  expect(getByText('Button clicked!')).toBeInTheDocument();
});

What are some best practices for testing Svelte components?

Some best practices include:

1. Test user interactions rather than implementation details.
2. Keep tests isolated and focused on one behavior.
3. Use descriptive test names to clarify what is being tested.

How do I set up Svelte Testing Library in my project?

To set up Svelte Testing Library, first install it via npm:

npm install --save-dev @testing-library/svelte

Then, configure your testing framework (like Jest or Mocha) to work with Svelte.