title: Testing asynchronous RxJs operators published: true tags: angular,unit-testing,javascript,front-end-developmen canonical_url: https://blog.angularindepth.com/testing-asynchronous-rxjs-operators-5495784f249e

Time traveling with virtual time and time progression syntax

Are you working with RxJS? Yes, everybody does those days! Have you already heard about marble diagrams? Yes, since you work with RxJS 😉 Did you know that you can apply marble diagrams in tests? Probably.

But have you already heard about “time progression syntax”?

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