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，但是我不知道如何介绍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;
}

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我该怎么做?

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How do I do it?

推荐答案

您可以模拟 try块的任何句子以引发要捕获的异常.

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)执行相同的操作

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)

您可以执行以下操作(由于方法getInstance是static，因此必须使用 PowerMockito 代替Mockito，有关更多信息，请参见此问题信息)

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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