檢查與should.js和摩卡一拋出新的錯誤

Question

我有拋出，像這樣的錯誤：

if (somethingBadHappened) { 
    throw new Error('what were you thinking, batman?') 
} 

現在我想編寫一個測試來檢查，這將引發預期時：

should(MyClass.methodThatShouldThrow()).throws('what were you thinking, batman?') 

但是，實際上會引發錯誤。我究竟做錯了什麼？ Should.js文檔非常簡單，因爲它繼承自assert.throws，但即使這樣的文檔在'should.js'方法中也不起作用？

Answer 1

正如您發現的那樣，您的代碼執行了引發錯誤的函數& should沒有得到它的機會。

要允許正確的斷言，您需要將函數調用包裝在一個匿名函數中。

should(function() {MyClass.methodThatShouldThrow();}).throw('what were you thinking, batman?')