jasmine-marbles

Testing Observable Streams

This feature allows you to test the behavior of cold observables by using marble diagrams. The `cold` function creates a cold observable, and `expectObservable` is used to assert that the observable behaves as expected.

const { cold, hot, expectObservable, expectSubscriptions } = require('jasmine-marbles');

it('should test cold observable', () => {
  const source = cold('--a--b--c|');
  const expected = '--a--b--c|';
  expectObservable(source).toBe(expected);
});

Testing Hot Observables

This feature allows you to test the behavior of hot observables. The `hot` function creates a hot observable, and `expectObservable` is used to assert that the observable behaves as expected.

const { cold, hot, expectObservable, expectSubscriptions } = require('jasmine-marbles');

it('should test hot observable', () => {
  const source = hot('-a-^--b--c|');
  const expected = '---b--c|';
  expectObservable(source).toBe(expected);
});

Testing Subscriptions

This feature allows you to test the subscription behavior of observables. The `expectSubscriptions` function is used to assert that the observable's subscriptions match the expected subscription pattern.

const { cold, hot, expectObservable, expectSubscriptions } = require('jasmine-marbles');

it('should test subscriptions', () => {
  const source = cold('--a--b--c|');
  const subs = '^-------!';
  expectSubscriptions(source.subscriptions).toBe(subs);
});