如何驗證傳遞給模擬函數的異常的類型？

Question

在我的代碼，有：

def submitContent(getDocContent:() => String, callback: Try[Boolean] => Unit): Unit = { 
    // .... 
    callback(Failure(new InflightChangeTimeoutException(pendingChange))) 
} 

我想測試在某些情況下，callback將與一些InflightChangeTimeoutException一個Failure被調用，但我不」關心什麼異常的價值。

在我speces2測試，我tryied：

val callback = mock[Try[Boolean] => Unit] 

submitContent(() => "any-other", callback) 

there was one(callback).apply(===(Failure(any[InflightChangeTimeoutException]))) 

會給我一些錯誤，如：

The mock was not called as expected: 
Argument(s) are different! Wanted: 
function1.apply(
    'Failure(com.test.InflightChangeTimeoutException)' 

is not equal to 

'Failure(null)' 
); 

不知道是哪裏不對。如何解決它？

Answer 1

any[A]是將作爲參數的匹配器註冊到模擬函數中作爲副作用的函數。但any[A]的返回值實際上是null。

所以檢查回調的結果，正確的方法是：

there was one(callback).apply(beLike[Failure[Boolean]] { case Failure(t) => 
    t must beAnInstanceOf[InflightChangeTimeoutException] 
})