Question

我是测试自动化的新手（Mockito，JUnit），我不知道如何测试以下类。方法中有最终的类，空白和异常，并且非常难。

private final static String SERVER="http://testserver:9086";
private void checkServerr() throws myException {
    try {
        URL hp = new URL(SERVER);
        URLConnection hpCon = hp.openConnection();
        hpCon.connect();
    } catch (Exception e) {
        throw new myException("Server " + SERVER + " not available");
    }
}

Answer 1

为了使这个可测试，首先你需要稍微折射一下：

private void checkServerr() throws myException {
    return checkServer(SERVER);
}

protected void checkServer(String server) throws my exception {
    try {
        URL hp = new URL(server);
        URLConnection hpCon = hp.openConnection();
        hpCon.connect();
    } catch (Exception e) {
        throw new myException("Server " + server + " not available");
    }
}

现在，您可以测试将服务器地址作为字符串的新受保护方法。

我在这里只看到两件事要测试：

连接成功。你需要一个虚拟服务器来实现它
连接失败，预期异常myException

Answer 2

在阅读了Janos的回答之后，我想到了以下内容。

在服务类MyService.java中集成URLConnection的创建：

public class MyService {
    private static final String MYSERVER = "http://testserver:9086";

    public URLConnection createConnection(Properties properties) throws MalformedURLException, IOException {
        return new URL(MYSERVER).openConnection();
    }
}

然后是myinitial class myClass.java：

public class myClass {
    private URLConnection serverConnection;
    private void checkServer() throws myException  {
        MyService service = new MyService();
        try {
            serverConnection = service.createConnection();
            serverConnection.connect();
        } catch (Exception e) {
             throw new myException("Server " + SERVER + " not available");
        }
    }
}

测试将是：

@Mock
private URLConnection serverConnection;

@Before
public void setUp() throws Exception {
    MockitoAnnotations.initMocks(this);
}

@Test
public void testCheckInfrastructure() throws myException,
        IOException {
    Mockito.doNothing().when(serverConnection).connect();
    myClass.checkServer();
}

@Test(expected = myException.class)
public void testCheckServerException() throws myException, IOException {

    Mockito.doThrow(myException.class).when(serverConnection).connect();
    myClass.checkServer();
}

使用final类，void方法和异常为小方法创建测试

2 个答案: