问题描述
我正在尝试使用Scalacheck生成随机数据.我有一个带有许多属性的案例类层次结构.到目前为止，我发现填充案例类的唯一方法是这样的:
I'm trying to generate random data with Scalacheck. I have a hierarchy of case classes with many properties. The only way I've found so far to populate the case classes is like this :
case class Data(a: String,
b: String,
c: String)
val genLigneDecompte: Gen[Data] = for {
ag <- Gen.alphaStr
bg <- Gen.alphaStr
cg <- Gen.alphaStr
} yield Data(
a = ag,
b = bg,
c = cg
)
对于具有10到20个属性的案例类，这非常繁琐.我想知道是否有某种方式可以使其自动化...
For a case class with 10-20 properties it's pretty tedious. I was wondering if there was a way to automate it somehow...
推荐答案
我确信有人会提出一个使用变形.但是，有一些辅助方法可以从可变性的函数生成Gen [T]实例，这些方法可以与case类伴侣对象的apply方法一起使用
I am sure somebody will come up with a solution that abstracts over arity using shapeless. But there are some helper methods to generate Gen[T] instances from functions of varying arity, which can be used with the apply method of the case class companion object
case class Data(a: String, b: String, c: String)
val dataArb = Arbitrary(Gen.resultOf(Data))
// equivalent to
// val f: (String, String, String) => Data = Data.apply
// val gen: Gen[Data] = Gen.resultOf(f)
// val arb: Arbitrary[Data] = Arbitrary(gen)
这篇关于scalacheck案例类随机数据生成器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！