What are Jest snapshots in Angular testing?

What are Jest snapshots in Angular testing?

Jest snapshots are a feature that allows you to capture the rendered output of your Angular components and save it for future comparisons.

How do I create a snapshot test in Angular using Jest?

To create a snapshot test, you can use the toMatchSnapshot() method in your test file after rendering your component.

Can you show me an example of a snapshot test?

Sure! Here's a simple example:

import { render } from '@testing-library/angular';
import MyComponent from './my-component';

test('renders correctly', () => {
  const { container } = render(MyComponent);
  expect(container).toMatchSnapshot();
});

What should I do if my snapshot test fails?

If a snapshot test fails, you can review the changes and decide whether to update the snapshot or fix the component to match the expected output.