Java 单元测试测试异常
在单元测试中总会涉及到Exception的测试，测试的范例如下：

public void testGetUserNotDefined(){  TestRequest req = new TestRequest("test not Defined");  try{        contr.getUser(request);      fail("An exception should be raised if the request handler has not been defined");  }catch (Runtimeexception exception){       assertTrue(true); }}