Compare and record new at the same time

[Krizai]

Added ability to perform both record new image and compare with old one at the same time.

When i am reported about some diff in snapshots by the build server, sometimes i know that there was a small change in color, font or image asset. In this case i only want to regenerate my ref images. But during regeneration i really want to know that no other minor changes was made between test run on a build server and generation. It would be good to generate diffs of old ref images with a potential new one.

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[nscoding]

Can I have some tests for this?

[nscoding]

new line before {

[Krizai]

@nscoding Previously there were no tests included for recordMode. Do you want me to add some ? Or just small tests for recordMode<->mode ?

[nscoding]

hmm I've been think about this for a while, I am not really sure how this property will be used. Can you provide some examples on how this will be integrated with your CI tooling?

[Krizai]

The main idea is to make the process of creating new ref screenshots easier.
For example my CI reports that there is some differences in screenshots. I've checked and see that the font was changed, but this is ok, as it was changed in the "common lib" project. At that point I'd like to recreate the ref screenshots with new font used. I can do it either manually or automatically on CI, but in any case I'd like to be sure that the only difference in new screenshots is the font. The easiest way to do so is to have diffs also on this stage.