update tests based on dev ggplot2

[topepo]

The ggplot2 news file implies that the plot object structure has changed a bit when it comes to labels:

(internal) default labels are derived in ggplot_build() rather than in ggplot_add.Layer() (@teunbrand, #5894)
An attempt is made to use a variable's label attribute as default label (@teunbrand, #4631)

We have tests that inspect the labels and, if we are using the defaults, they are now missing.

This PR will probably fail until #950 is merged.

This probably affects finetune too @simonpcouch

[teunbrand]

Hi Max, thanks for keeping vigilant and up to date! If you want to continue to test the labels, we also implemented an accessor (tidyverse/ggplot2#6078) for exactly this reason.

[topepo]

we also implemented an accessor (tidyverse/ggplot2#6078) for exactly this reason.

That, good sir, is exceedingly helpful.

Is there anything similar for mappings and/or facets

[teunbrand]

For strip labels we have a new get_strip_labels() function (tidyverse/ggplot2#5924).
I don't think we have something for mappings, but I wouldn't oppose implementing something to that extent if you file a feature request.

[hfrick]

Max, did you want to make use of that accessor that Teun mentioned? Or not at this time?

[topepo]

It's in dev ggplot2 so we'll wait #952

[github-actions]

This pull request has been automatically locked. If you believe you have found a related problem, please file a new issue (with a reprex: https://reprex.tidyverse.org) and link to this issue.