預期的異常JUNIT

Question

我想在數據庫中添加一個對象，而不是檢查該對象是否已經存在，因此我們不能將其添加兩次。 我使用JUNIT進行了測試：

@org.junit.Test (expected = ExistingProduct.class)
public void AddExisting() 
{

    Register aRegister = new Register();
    Product aProduct = new Product();
    aProduct.setPIN("079400027252"); 

    aRegister.AddProduct(aProduct);


    Product sameProduct = new Product();
    sameProduct.setPIN("079400027252");

    aRegister.AddProduct(sameProduct); //this throw the exception


    aRegister.deleteProduct("079400027252"); //CAN'T REACH HERE
}

問題是我無法刪除產品，因為之前調用的指令將引發異常，從而結束測試。

Answer 1

好吧，我有點弄清楚了...我調用@Before方法witch從BD刪除所有文件並放回默認值

Answer 2

也許像這樣解決這個問題。 更多內容請看Sergey Berezovskiy的https://stackoverflow.com/a/20494165/4296891

public void AddExisting() 
    {

        Register aRegister = new Register();
        Product aProduct = new Product();
        aProduct.setPIN("079400027252"); 

        aRegister.AddProduct(aProduct);


        Product sameProduct = new Product();
        sameProduct.setPIN("079400027252");
        try
        {
            aRegister.AddProduct(sameProduct); //this throw the exception
            assertEquals("Can't add it twice exception has been excepted." ,true, false);
        }
        catch(ExistingProduct exception)
        {        
            // exception
        }

        aRegister.deleteProduct("079400027252"); //CAN'T REACH HERE
    }