测试类夹具内部的异常处理？

Question

The line within <s></s> causes a ClassNotFoundException to be thrown and must be handled in order to compile. If I resolve the compile error by surrounding with try-catch then each unit test will be working with an uninitialized instance if the exception was thrown. What would happen if I add throws to the method signature?

@Test
public class PanelControllerTest {

    private PanelController panelController;

    @BeforeTest
    public void beforeTest() {

        panelController = <s>new PanelController();</s>

    }
}

I'm new to test fixtures and I'm assuming this would be a correct way to test an instance of the class. What's the best way to handle exceptions inside the test fixture setup code?

UPDATE: This seems to be the source of the exception called from PanelController:

class DBAccess {
    public DBAccess(DBConnection dbConnection) throws ClassNotFoundException {
         Class.forName(Constants.jdbcDriver);
         ...
    }
}

Answer 1

The correct behavior is to capture the exception and fail the test run.

@BeforeTest
public void beforeTest() {
  try{
    panelController = new PanelController();
  } catch (Exception e) {
    fail("Test failed because dependency could not be instantiated. Exception was:"+e.getMessage());
  }
}

In an ideal world you probably wouldn't be dependent on a db (because it's hard to manage their state for testing) when running tests, but use a mock object instead. Still, if you have to rely on it best to fail the test run if the db is out of order, and surface that as a direct failure.