This is a concern I have encountered as well. Especially once a component
composes other components, it becomes very difficult to understand the best
approach for mocking.
In a project I'm working on, one component is responsible for API calls.
(Let's call it <example-api>). Another component depends on <example-api>
by composing it. So we have a composition like:
<polymer-element name="example-component">
<template>
<example-api></example-api>
<!-- other code -->
</template>
</polymer-element>
The problem this presents is that whenever I want to write a test for
example-component, and I add an example-component to the page, it's going
to add an example-api component as well, and if that component does any
XHRs on load, I have no way to interrupt or redirect them. I want to be
able to create an example-component with a* stubbed* version of
example-api, but don't know how to do that.
This is definitely an area where Polymer needs more discussion,
documentation, and guidance.
Feedback and input very welcome.
On Monday, November 17, 2014 3:47:15 PM UTC-5, [email protected] wrote:
>
> I have looked into Polymer a lot and plan to start a small project with it
> soon.
> However, I'm really concerned with testing as I would like to build my
> components
> by the FIRST principle http://www.addyosmani.com/firs/index.html. While
> Polymer seem to solve the first four (Focused, Independent, Reusable,
> Small)
> very good but it seems to struggle with the last one (Testable).
>
> While web-component-tester provides a way of unit-testing components it
> doesn't
> seem to provide the answer to Mocking and thus very much limits the
> testability
> of components.
>
> Mocking HTTP, Websocket, Geolocation and similar is crucial but it would
> also
> be very good to be able to mock sub components so that tests of components
> that composit other components doesn't become integration tests.
>
> Is there anything I have missed or is this a missing part in Polymer and
> Web Components?
>
Follow Polymer on Google+: plus.google.com/107187849809354688692
---
You received this message because you are subscribed to the Google Groups
"Polymer" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/polymer-dev/d2723c0e-c38e-49ab-8ff5-a24b013cdca6%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
