What are some examples of marble testing in RxJS?

What are some examples of marble testing in RxJS?

Marble testing in RxJS allows you to visualize and test observables. Would you like to see a specific example?

Yes, can you show me a simple marble test for a basic observable?

Sure! Here's a simple example:

import { cold, getTestScheduler } from 'jasmine-marbles';

it('should emit values correctly', () => {
  const source$ = cold('---a--b--c|');
  const expected$ = cold('---a--b--c|');
  expect(source$).toBeObservable(expected$);
});

This tests that the observable emits values 'a', 'b', and 'c' at the correct times.

What about testing error scenarios?

For error scenarios, you can use:

const source$ = cold('---#'); // Simulates an error
const expected$ = cold('---#');
expect(source$).toBeObservable(expected$);

This tests that the observable throws an error as expected.

Can you explain how to set up marble testing in my project?

To set up marble testing, install jasmine-marbles and configure it in your testing framework. Would you like detailed steps?