WIP: Shiny examples testing automation

[shalutiwari]

No description provided.

[yihui]

Since this PR contains a lot of PNG files, I strongly recommend that you run optipng *.png on them to (significantly) reduce the file sizes.

[wch]

Using optipng will actually break the tests, because for testing, the PNG files are compared byte-for-byte.

[yihui]

Bummer. Is it possible to split these tests into a different repo then? Just asking... 1839 files sounds like a lot to me.

[wch]

True, that is a lot to put into this repo. We'll think about ways to keep the results separate.

[shalutiwari]

I'll look into it and then discuss with Winston how we can keep it small and still useful.
Thanks for your suggestions/feedback Yihui.

[bborgesr]

a submodule may be the best idea: https://git-scm.com/book/en/v2/Git-Tools-Submodules

[cpsievert]

In case anyone is curious, the total size of these image files is about 38 Mb

> sum(sapply(Sys.glob("*/tests/mytest-expected/*.png"), file.size)) / 1000000
[1] 38.19511

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