当通过when()时，mock不识别我的mock类

Question

我希望closeSession()方法在被调用时抛出一个异常，这样我就可以测试我的日志记录是否完成。我将Crypto对象模拟为mockCrypto，并将其设置如下:

@Test
  public void testdecrpyMcpDataExceptions() throws Exception {
    Crypto mockCrypto = Mockito.mock(Crypto.class);
      try {
            mockCrypto = CryptoManager.getCrypto();
            logger.info("Cyrpto Initialized");
      } finally {
            logger.info("Finally");
            try {
                logger.info("About to close Crypto!");
                Mockito.doThrow(new CryptoException("")).when(mockCrypto).closeSession();
                mockCrypto.closeSession();
                } catch (CryptoException e) {
                    logger.warn("CryptoException occurred when closing crypto session at decryptMcpData() in CipherUtil : esi");
                }
            }
    }

然而，当我运行它时，我得到了错误:

Argument passed to when() is not a mock!

我嘲笑的类是错误的还是我只是错过了什么?

Answer 1

不要在

处覆盖mock

mockCrypto = CryptoManager.getCrypto();

测试

@Test(expected=RuntimeException.class)
    public void testdecrpyMcpDataExceptions() throws Exception {
        Crypto mockCrypto = mock(Crypto.class);
        doThrow(new RuntimeException()).when(mockCrypto).closeSession();
        mockCrypto.closeSession();
    }

没问题。

Answer 2

这一行将覆盖您的mock:

mockCrypto = CryptoManager.getCrypto();