我刚刚开始测试,我也在我的android应用中使用MVP
模式。NPE当调用模拟
目前我有一个使用下面的Android代码来测试,如果电子邮件地址是有效的一个主持人:
android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches()
因为它不可能与本地JVM
单元测试,我决定到后面躲起来,对其进行测试接口:
public interface EmailValidator {
boolean isValidEmail(CharSequence target);
}
和这里的实现:
public class EmailValidatorImpl implements EmailValidator {
@Override
public boolean isValidEmail(CharSequence target) {
if (target == null) {
return false;
} else {
return android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
}
}
}
所以现在我的测试代码:
公共类SignUpPresenterTest {
@Mock
private SignUpMVP.View view;
@Mock
private EmailValidator validator;
private SignUpPresenter presenter;
private String email = "[email protected]";
private String password = "ABCDabcd";
private String username = "username";
@Before
public void setUp() throws Exception {
MockitoAnnotations.initMocks(this);
presenter = new SignUpPresenter(view);
}
@Test
public void onButtonSignUpClicked() throws Exception {
when(validator.isValidEmail(email))
.thenReturn(true);
presenter.onButtonSignUpClicked(email, password, username);
verify(view).executeSignUpService();
}
}
,现在我得到一个NPE当上面的调用代码:EmailValidatorImpl.isValidEmail()
java.lang.NullPointerException
at com.example.signup.helpers.EmailValidatorImpl.isValidEmail(EmailValidatorImpl.java:20)
at com.example.signup.SignUpPresenter.showErrors(SignUpPresenter.java:67)
at com.example.signup.SignUpPresenter.onButtonSignUpClicked(SignUpPresenter.java:25)
at com.example.signup.SignUpPresenterTest.onButtonSignUpClicked(SignUpPresenterTest.java:43)
和我的问题是:这不是我应该如何使用Mockito
?有什么我可以做的测试我的代码,并避免NPE
?