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By Daniel Ramoson 15/08/2018

Testing RxJS Observables with Marble Diagrams

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Testing RxJS might be a hard task, specially when we have a complex pipeline with lots of time assertions. In this article we’ll explore how can we make these tests easier to reason about using Marble Diagrams, but first:

What are Marble Diagrams?

Marble Diagrams are visual representation for events emitted over the time. For example, this is the diagram corresponding to an emission from 0 to 3 over the time:

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Source: https://medium.com/lean-mind/testing-rxjs-observables-with-marble-diagrams-c2e45820c5cb