如何通过JUnit覆盖块捕获

Question

我想涵盖此try块的catch部分与JUnit。我该怎么做？

public class ClientCertSocketFactory implements SecureProtocolSocketFactory { 
    private static final Logger LOGGER = LoggerFactory.getLogger(ClientCertSocketFactory.class); 

    private SSLSocketFactory sslSocketFactory; 

    public ClientCertSocketFactory() throws IOException{ 
     String trustStoreFilePath = System.getProperty("javax.net.ssl.trustStore"); 
     try { 
      TrustManagerFactory trustManagerFactory = CertManagerFactory.loadTrustStore(trustStoreFilePath); 
      SSLContext sslContext = SSLContext.getInstance("TLS"); 
      sslContext.init(null, trustManagerFactory.getTrustManagers(), null); 
      this.sslSocketFactory = sslContext.getSocketFactory(); 
     } catch (NoSuchAlgorithmException e) { 
      LOGGER.error("No Provider supports a TrustManagerFactorySpi implementation for the TLS protocol. Error message: " + e); 
     } catch (KeyManagementException e) { 
      LOGGER.error("Error occurred when initializing SSLContext. Error message: " + e); 
     } 
    } 
} 

Answer 1

First of all, catching exceptions and doing nothing but logging them is a Code Smell. Read this article, for example.

话虽这么说，这是也一个代码味道，当你调用这些创建方法，如：

• CertManagerFactory.loadTrustStore
• SSLContext.getInstance

在构造函数中，而不是传入它们。如果要使用Dependency Injection来代替，可以将这些对象传递给构造函数，并查看构造函数是否按照您希望的方式工作。