How to generate values for case class parameters in scala

Question

I have a case class with 250 fields:

case class Data(field1:String, field2:Int, .. )

Is there a way to use scala check to generate values for its parameter

You could use the `Generic` approach from the shapeless library to transform an `HList` to a case class instance. There is an example here: https://github.com/milessabin/shapeless/blob/master/examples/src/main/scala/shapeless/examples/csv.scala. — devkat, Jul 29 '16 at 15:03

score 5 · Accepted Answer · answered Jul 29 '16 at 15:18

import org.scalacheck.Shapeless._
import org.scalacheck.Arbitrary._

implicitly[Arbitrary[Data]]

The above snippet does the following:

Summon a shapeless.Generic[Data] via implicit macro to transform you case class into a shapeless.HList
Recursively obtain all Arbitrary[String], Arbitrary[Int] and so on for every field
Assemble all that into a new Arbitrary[Data] instance

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