webapp testing

[sfmig]

Sort of implied as part of the implementation, but @samcunliffe and I were thinking it may be good to collect some notes/resources on the topic here.

This seems like a good starting point.
(For what is worth, I found the dash tutorials to be quite nice).

Specific things to test:

• check dataframe export considering as inputs both single and multianimal DLC data

More to come!

[sfmig]

also likely relevant (and mentioned in the Dash tutorial above): Selenium

[samcunliffe]

I've done little pieces #32 & #36 but we planned to tackle this properly in April, so moved to Milestone/v1.

Blocks

• refactoring #56