我在使用Spring和Struts的Java项目中使用Mockito,我在测试操作方面遇到了问题。
我没有使用Struts2 jUnit插件来使用这种方法节省测试时间:Strut 2.3.1.2 Unit test, how to remove Spring codependency vs NPE with getContext()。
问题是在我的行动中,当调用 getText()时,我有一个NullPointerException。
我正在试图监视这个方法,它继承自 ActionSupport ,但我找不到办法,因为该操作在测试中使用 InjectMocks 进行了注释。 / p>
这是一个简单的类示例:
父:
public class ActionSupport {
public String getText(String aTextName){
return this.getTextProvider().getText(aTextName);
}
}
我的行动:
public class MyAction extends ActionSupport {
@Autowired private IMyService myService;
public String execute(){
getText("SomeText");
myService.something();
return SUCCESS;
}
}
测试:
@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {
@Mock private IMyService myService;
@InjectMocks private MyAction myAction;
@Before
public void before() {
MockitoAnnotations.initMocks(this);
}
@Test
public void test() {
myAction.execute();
}
}
我遇到了这个例外:
java.lang.NullPointerException
at com.opensymphony.xwork2.util.TextParseUtil.translateVariables(TextParseUtil.java:167)
at com.opensymphony.xwork2.util.TextParseUtil.translateVariables(TextParseUtil.java:126)
at com.opensymphony.xwork2.util.TextParseUtil.translateVariables(TextParseUtil.java:48)
at com.opensymphony.xwork2.util.LocalizedTextUtil.getDefaultMessage(LocalizedTextUtil.java:663)
at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:534)
at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:362)
at com.opensymphony.xwork2.TextProviderSupport.getText(TextProviderSupport.java:208)
at com.opensymphony.xwork2.TextProviderSupport.getText(TextProviderSupport.java:123)
at com.opensymphony.xwork2.ActionSupport.getText(ActionSupport.java:103)
at es.MyAction.execute(MyAction.java:148)
如果我使用 @Spy 注释 MyAction 维护 @InjectMocks ,我有一个 StackOverflowError 。< / p>
我如何只侦察 ActionSupport.getText()并让 mockito 为我的行动注入嘲笑?
答案 0 :(得分:3)
我会避免使用@InjectMocks
,因为它会无声地失败。
只需使用MyAction
(即构造函数注入)向@Autowired
添加构造函数即可。这也有助于保证所需的依赖性。
您不需要initMocks
和MockitoJUnitRunner
。
public class MyAction extends ActionSupport {
private IMyService myService;
@Autowired
public MyAction(MyService myService) {
this.myService = myService;
}
public String execute(){
getText("SomeText");
myService.something();
return SUCCESS;
}
}
@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {
@Mock
private IMyService myService;
private MyAction myAction;
@Before
public void setup() {
myAction = spy(new MyAction(myService));
}
@Test
public void test() {
assertThat(myAction.execute(), equalTo(Action.SUCCESS));
verify(myAction, times(1)).getText();
verify(myService, times(1)).something();
}
}