Cats: Add cats-testkit-scalatest microlibrary for V2.0.0

[ronanM]

Add the microlibrary cats-testkit-scalatest for testing with scalatest, containing StrictCatsEquality.

See this comment: https://github.com/typelevel/cats/pull/2970#issuecomment-521305922

[ChristopherDavenport]

I can grab this really quickly if no objections are taken to my template. Example in discipline-specs2 and discipline-scalatest.

[jhnsmth]

Maybe it makes sense to combine it with https://github.com/IronCoreLabs/cats-scalatest unfortunately it does not seems well maintained

[kailuowang]

We can do that later. Right now we need this for 2.0 release

On Thu, Aug 29, 2019, 9:00 AM Alex [e-mail] wrote:

Maybe it makes sense to combine it with
https://github.com/IronCoreLabs/cats-scalatest unfortunately it does not
seems well maintained

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[ChristopherDavenport]

cats-testkit-scalatest 1.0.0-M1 Released! https://github.com/typelevel/cats-testkit-scalatest

[rajit-iov42]

The only library I can find for Cats 2 providing CatsSuite is cats-testkit-scalatest. But this depends on bleeding edge ScalaTest libraries that contain significant breaking changes (e.g. GeneratorDrivenPropertyChecks no longer works with Gen instances from ScalaCheck). Is this the intention? It'd be great to be able to upgrade to Cats 2 without needing to worry about lots of tests breaking and needing to be rewritten.

[larsrh]

@rajit-iov42 There's currently an RC-quality version out. IMHO that should be sufficient for tests.