is short for marble testing
RxJS 6 offers great testing features as you can find here.
However I found it confusing how to get started with this but then this post was helpful for me to understand and get started.
And I made this gist and now I created this as npm package because why not.
$ yarn add --dev marblet
How to use
Checkout tests. It's both tests and examples.
I used Jest for testing in there but it should have no problems being used with any testing framework.