ScalaCheck
interop-cats
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ScalaCheck | interop-cats | |
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3 | 5 | |
1,932 | 159 | |
0.4% | 1.9% | |
8.3 | 5.2 | |
6 days ago | 9 days ago | |
Scala | Scala | |
BSD 3-clause "New" or "Revised" License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
ScalaCheck
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How to Survive Your Project's First 100k Lines
Regarding numbers 2 and 3, I believe you are describing "property-based testing"[0]. A Scala version of this is ScalaCheck and can be found here[1].
There appears to be at least one Rust library which claims to provide same, but I am not a Rust developer so cannot recommend any for fitness of purpose.
0 - https://hypothesis.works/articles/what-is-property-based-tes...
1 - https://github.com/typelevel/scalacheck/blob/main/doc/UserGu...
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Friction-less scala - Tell us what is causing friction in your day-to-day life with Scala
And the readmes and tutorials written for the major libraries are some of the best, and most concise out there. Seriously, even the old stuff, like scalacheck's guide is really good. Compare that to hypothesis. The hypothesis uses readthedocs, but other than the window dressing, much better. Try to find similar concise guides for major Java projects outside of spring boot. They're all external to the projects, published on Baeldung.
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I’m really struggling with testing using Scalatest.
Write your test as properties that must be held, and let the framework generate random values and apply the function to thus values and compare the output by those properties. Take a look to ScalaCheck for that approach.
interop-cats
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I have decided to connect my future with Scala (if possible), need little advice
If you're using http4s, don't use ZIO. Yes, ZIO has an interop-cats module, so you can do this. But using http4s means you're working in the conceptual framework the Typelevel ecosystem is based on (and what interop-cats does can be characterized as "describe ZIO's implementation in those terms, so the Typelevel ecosystem can make heads or tails of it.") This is essentially all cost and no benefit: you can't avoid understanding the Typelevel ecosystem if you use http4s (at least, no more than you can by using cats-effect), and you don't get any of the value proposition of ZIO (interop-cats gives you Typelevel typeclass instances for the RIO type alias, which means your error channel is rooted in Throwable, and you're faced with the most complex part of the ZIO ecosystem: ZLayer, which the Typelevel ecosystem doesn't use and doesn't need). Finally the ZIO ecosystem is still quite immature, and this brings us to documentation. There is not (yet!) anything comparable to:
- Using FS2 alongside ZIO?
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Friction-less scala - Tell us what is causing friction in your day-to-day life with Scala
These are necessarily oversimplifications. In particular, the ZIO ecosystem offers the relevant instances of cats-effect typeclasses to support use of the ZIO type in the cats-effect ecosystem.
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Why Typelevel hates ZIO?
However, ZIO continues to offer cats-effect type classes and I certainly have no doubt cats-effect 3 continues to benefit from John's contributions. Furthermore, I likewise don't doubt the value of the ZIO ecosystem generally, and John's success in building the ZIO community speaks for itself. I personally have chosen to remain closer to the other, let's say "classical," pure FP ecosystems, partially for historical (or, if you prefer, "sunk cost") reasons, but partially because I'm satisfied the value of the Haskell/Typelevel/PureScript/fp-ts/etc. interplay warrants it.
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Is it possible to use cats' monad transformers (OptionT, EitherT) with an effect type (F) that has >1 type parameter?
It seems that zio/interop-cats faces a similar issue.
What are some alternatives?
ScalaTest - A testing tool for Scala and Java developers
cats-effect - The pure asynchronous runtime for Scala
Gatling - Modern Load Testing as Code
slick-cats - Cats instances for Slick DBIO
scalaprops - property based testing library for Scala
fs2-grpc - gRPC implementation for FS2/cats-effect
Nyaya - Random Data Generation and/or Property Testing in Scala & Scala.JS.
sbt-crossproject - Cross-platform compilation support for sbt.
ScalaMock - Native Scala mocking framework
purescript - A strongly-typed language that compiles to JavaScript
Specs2 - Software Specifications for Scala
mules-http4s - Http4s Caching Implementation