我是Java世界的新手,但是很难理解为什么我不能将一个模拟对象的方法存根...
@RunWith(MockitoJUnitRunner.class)
public class ChildBLLIT extends BaseInteractorIT {
@InjectMocks
private ChildBLL ChildBLL = Mockito.mock(ChildBLL.class);
@Before
public void setUp() {
ChildBLL.engine = engineMock;
}
/**
* Test of getZipStatistics method, of class ChildBLL.
*/
@Test
public void testGetZipStatistics() {
final String testZipStatisticsText = "DummyZipStatistics";
//This method will throw the null pointer exception
when(ChildBLL.engine.getZIPStatistics()).thenReturn(testZipStatisticsText);
ChildBLL.getZipStatistics();
verify(ChildBLL.engine).getZIPStatistics();
}
}
当我尝试存根getZIPStatistics()方法时,我总是得到一个空指针异常,当然我得到了,因为在getZIPStatistics()方法中有一个私有对象,它没有被嘲笑......在我看来Mockito并没有嘲笑私人领域......不幸的是,这是来自另一个项目:
public class BaseIT {
@Mock
protected static FromOtherProject engineMock;
@Before
public void initMocks() {
MockitoAnnotations.initMocks(this);
}
}
这里我模拟了引擎变量,但是我怎样才能模拟/存根getZIPStatistics()方法?这是这个方法:
public class FromOtherProject {
//...
public final String getZIPStatistics() {
return ZIPStatistics.toString();
}
}
我该怎么办?
答案 0 :(得分:1)
让我们假设一个简单的课程......
public class Account {
public String getPassword() {
return "abc";
}
}
...包含它的简单类......
public class AccountHolder {
private Account account;
public String getAccountPassword() {
return this.account.getPassword();
}
}
现在我们为所有基于帐户的测试提供了一个简单的基类...
public class AccountBasedTest {
@Mock
protected Account account;
}
...以及实际测试AccountHolder的类......
@RunWith(MockitoJUnitRunner.class)
public class AccountHolderTest extends AccountBasedTest {
@InjectMocks
private AccountHolder accountHolder;
@Test
public void getAccountPasswort_must_return_account_password() {
Mockito.when( this.account.getPassword() ).thenReturn ("xyz");
Assert.assertEquals("xyz", this.accountHolder.getAccountPassword());
}
}
这就是全部。 @InjectMocks等注释也将在超类中查找,因此您将获得您的模拟帐户,该帐户将被放入您的AccountHolder。无需致电MockitoAnnotations.initMocks
。它不应该受到伤害,但不需要它,因为你已经使用了MockitoJUnitRunner
,这正是如此。