好的，我正在寻找 FsUnit 来开发一些 F# 代码的测试，并且我正在查看GitHub 上的示例 BowlingGame.fsx 。
参加第一次测试：
[<Test>]
let ``with simple scores should get the expected score.`` () =
scoreBowls [1;2;3] |> should equal 6
由于编译器错误，我得到了一个红色波浪线：
The value or constructor 'should' is not defined
有什么建议么？
编辑：下面添加了完整的源代码。
module Calculations.UnitTests
open NUnit.Framework
open FsUnit
let (|EndOfGame|IncompleteStrike|Strike|Normal|Other|) (l, frame) =
match l with
| _ when frame = 11 -> EndOfGame(0)
| [10;s] -> IncompleteStrike(10+s+s)
| 10::s::n::tail -> Strike(10+s+n, s::n::tail)
| f::s::n::tail when f+s = 10 -> Normal(f+s+n, n::tail)
| f::s::n::tail -> Normal(f+s, n::tail)
| ls -> Other(List.fold (+) 0 ls)
let scoreBowls bowls =
let rec scoreBowls' frame l current_score =
let nextframe = scoreBowls' (frame+1)
match (l, frame) with
| EndOfGame(score) -> current_score + score
| IncompleteStrike(score) -> current_score + score
| Strike(score, l) -> nextframe l (current_score + score)
| Normal(score, l) -> nextframe l (current_score + score)
| Other(score) -> current_score + score
scoreBowls' 1 bowls 0
[<Test>]
let ``with simple scores should get the expected score.`` () =
scoreBowls [1;2;3] |> should equal 6
[<Test>]
let ``with a spare should get the expected score (spare).`` () =
scoreBowls [2;8;1] |> should equal 12
[<Test>]
let ``with a strike should get the expected score (strike).`` () =
scoreBowls [10;1;2] |> should equal 16
[<Test>]
let ``that is perfect should get a score of 300.``() =
scoreBowls [for i in 1..18 -> 10] |> should equal 300
[<Test>]
let ``with spares in the last frame should get the expected score (spare in last frame).`` () =
scoreBowls ([for i in 1..18 -> 0] @ [2;8;1]) |> should equal 11
[<Test>]
let ``with a strike in the last frame should get the expected score (strike in last frame).`` () =
scoreBowls ([for i in 1..18 -> 0] @ [10;10;1]) |> should equal 21
[<Test>]
let ``with double strikes should add the score of the first strike to the score of the second.`` () =
scoreBowls [10;10;1] |> should equal 33
[<Test>]
let ``that looks like an average bowler's game should get the expected score (example game).`` () =
scoreBowls [1;4;4;5;6;4;5;5;10;0;1;7;3;6;4;10;2;8;6] |> should equal 133