Support for seeing diff between expected and tested

[pallix]

Hello,

Thanks for writing this library, it is very useful.
It would be very cool if it would be possible to get a diff between expected and tested values, like in PyTest (see the "Making use of context-sensitive comparisons" section)

[felixSchl]

I think this is something that could be implemented independent of purescript-spec, similar to how you would use chai with mocha.

[hdgarrood]

shameless plug for https://github.com/hdgarrood/purescript-debugged

[owickstrom]

Maybe a separate library with purescript-spec assertions based on purescript-debugged could be nice, if one wanted to build such a thing? 🙂

[JordanMartinez]

Most likely. At the recent BeachHac conference, someone was mentioning their take on a diffing type class: https://www.youtube.com/watch?v=1dTvSxPN7hQ&list=PLO46zvIozaIpZBhU85uvJXPg0PMmU-2ZY&index=1

[csicar]

I've been using elm-test recently and found the basic diffing on Show is already very useful.

If there's interest in having this as part of this library, I would like to give implementing it a try.

[owickstrom]

@csicar I don't have any strong opinions on the technique itself, only that it should probably be its own library if that works. Essentially providing an alternative to shouldEqual.

[flip111]

would be a cool feature. Does anyone know some algorithms for this? Perhaps already implemented in another language?