如何使用 NoSuchAlgorithmException 和 KeyStoreException 覆盖 JUnit 的块捕获

How to cover block catch by JUnit with NoSuchAlgorithmException and KeyStoreException(如何使用 NoSuchAlgorithmException 和 KeyStoreException 覆盖 JUnit 的块捕获)

问题描述

我想介绍 getKeyStore() 方法，但我不知道如何介绍 NoSuchAlgorithmException、KeyStoreException、UnrecoverableKeyException 和 CertificateException 的 catch 块.我的方法是:

I want to cover getKeyStore() methode, But I don't know how to cover catch block for NoSuchAlgorithmException, KeyStoreException, UnrecoverableKeyException and CertificateException. My methode is :

public static KeyManagerFactory getKeyStore(String keyStoreFilePath)
        throws IOException {
    KeyManagerFactory keyManagerFactory = null;
    InputStream kmf= null;
    try {
        keyManagerFactory = KeyManagerFactory.getInstance("SunX509");
        KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
        keystoreStream = new FileInputStream(keyStoreFilePath);
        keyStore.load(keystoreStream, "changeit".toCharArray());
        kmf.init(keyStore, "changeit".toCharArray());
    } catch (NoSuchAlgorithmException e) {
        LOGGER.error(ERROR_MESSAGE_NO_SUCH_ALGORITHM + e);
    } catch (KeyStoreException e) {
        LOGGER.error(ERROR_MESSAGE_KEY_STORE + e);
    } catch (UnrecoverableKeyException e) {
        LOGGER.error(ERROR_MESSAGE_UNRECOVERABLEKEY + e);
    } catch (CertificateException e) {
        LOGGER.error(ERROR_MESSAGE_CERTIFICATE + e);
    } finally {
        try {
            if (keystoreStream != null){
                keystoreStream.close();
            }
        } catch (IOException e) {
            LOGGER.error(ERROR_MESSAGE_IO + e);
        }
    }
    return kmf;
}

<小时>

我该怎么做?

How do I do it?

推荐答案

你可以mock try 块中的任何一句话来抛出你想捕获的异常.

You can mock any sentence of the try block to throw the exception you want to catch.

模拟 KeyManagerFactory.getInstance 调用以抛出 NoSuchAlgorithmException 的示例.在这种情况下，您将覆盖第一个 catch 块，您必须对捕获的其他异常(KeyStoreException、UnrecoverableKeyException 和 CertificateException)执行相同操作

Example mocking the KeyManagerFactory.getInstance call to throw NoSuchAlgorithmException. In that case, you will cover the first catch block, you have to do the same with other exceptions caught (KeyStoreException, UnrecoverableKeyException and CertificateException)

你可以这样做(因为方法 getInstance 是 static，你必须使用 PowerMockito 而不是 Mockito，请参阅此 问题了解更多信息)

You can do as follows (as method getInstance is static, you have to use PowerMockito instead Mockito, see this question for more info)

@PrepareForTest(KeyManagerFactory.class)
@RunWith(PowerMockRunner.class)
public class FooTest {

   @Test
   public void testGetKeyStore() throws Exception {
      PowerMockito.mockStatic(KeyManagerFactory.class);
      when(KeyManagerFactory.getInstance(anyString())).thenThrow(new NoSuchAlgorithmException());
   }
}

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