如何在FsCheck中注册任意实例并让xUnit使用它? [英] How do I register an Arbitrary instance in FsCheck and have xUnit use it?

问题描述

我有一个类型为Average的字段，count是一个正数int64，另一个是double字段，称为sum.

I've got a type Average with a field count that's a positive int64 and a double field called sum.

我随意设置了一个生成有效实例的条件

I made an arbitrary that generates valid instances with

 let AverageGen = Gen.map2 (fun s c -> Average(float(s),int64(int(c))) (Arb.Default.NormalFloat().Generator)  (Arb.Default.PositiveInt().Generator) |> Arb.fromGen

在xUnit中的Property样式测试中，如何获取平均值类型的参数?

How do I get this to be generate arguments with type Average in Property style tests in xUnit?

[<Property>]
static member average_test(av:Average) = ...

推荐答案

type Generators =
    static member TestCase() =
        { new Arbitrary<TestCase>() with
            override x.Generator =
                gen { ...
                      return TestCase(...) }}

[<Property(Arbitrary=[|typeof<Generators>|])>]

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