F# 测试结果是否为 Some(any)

Question

我需要检查我的验证函数是否 returns some 失败或 none。如果returnsSome<string>，则验证错误，否则有效，函数returnsNone。这是我的尝试，但重构并不安全：

[<Property(Arbitrary=[| typeof<Strings.WithLenFrom1To100> |])>]
    let ``lengthValidator should return some error when the string's length is longer than expected``(str:string)=
        let maxValidLen = str.Length-1
        let actual = lengthValidator maxValidLen str

        let expected = Some(sprintf "Maximum string length is %i but %s contains %i characters" maxValidLen str str.Length)
        //How can I say **let expected = Some(anything) **instead

        test <@actual = expected@>

Answer 1

test <@ actual.IsSome @>

F# 测试结果是否为 Some(any)

F# test if the result is Some(any)

f#

unit-testing

fscheck