[英]How to create a fsunit test for pattern matching in f#?
我是f#和fsUnit的新手,我想知道如何使用fsUnit測試模式匹配語句。 例如,如果我有以下代碼,你會如何為它編寫一個fsunit測試?
let Menu () =
let Choice = Console.ReadLine()
match Choice with
| "A" | "a" -> Function1()
| "B" | "b" -> Function2()
| "C" | "c" -> Function3()
| _ -> Printfn"Error"
首先,您將實現匹配邏輯的代碼與讀取輸入的代碼分開,因為您只能測試某些調用的結果是否正確:
let handleInput choice =
match choice with
| "A" | "a" -> Function1()
| "B" | "b" -> Function2()
| "C" | "c" -> Function3()
| _ -> "Error"
let menu () =
let choice = Console.ReadLine()
let output = handleInput choice
printfn "%s" output
現在,您可以編寫一系列測試,檢查handleInput
返回的字符串是否是您希望每個輸入的字符串:
handleInput "A" |> should equal "whatever Function 1 returns"
handleInput "b" |> should equal "whatever Function 2 returns"
handleInput "D" |> should equal "Error"
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