使用PowerMock模拟@InjectMocks的静态属性
使用PowerMock模拟@InjectMocks的静态属性
提问于 2012-10-23 20:47:38
我使用PowerMock和Mockito来测试Spring控制器。
我定义了类TestController (参见下面，狙击手#1)，并为其定义了一个单元测试(参见下面的Sniper2)。但是当我尝试对它进行单元测试时，我会得到一个异常(参见下面的Snipper #3)。
如果我删除@InjectMocks，删除定义上的TestController实例化，并在测试函数中执行controllerUT =()，它可以很好地工作(参见下面，狙击手#4)。
这让我相信，静态替换不会发生在@InjectMocks之前，我的问题是这是事情的工作方式，还是我做错了什么？是否有更好的方法来设计代码以避免这个问题？我猜人们使用静态日志分配(这不是我发明的)，所以一定有人在此之前遇到过这个问题。
谢谢!
片段#1
@Controller
@RequestMapping("/api/test")
public class TestController {
private static final Logger LOG = LoggerFactory.getLogger(TestController.class);
@Autowired
private GeneralService generalService;
@RequestMapping(method=RequestMethod.GET)
public void doSomethingUseful(
HttpServletRequest request,
HttpServletResponse response) {
// nothing userful to do right now
}
}代码片段#2
@RunWith(PowerMockRunner.class)
@PrepareForTest({TestController.class, LoggerFactory.class})
public class TestControllerTest {
@InjectMocks
private TestController controllerUT = new TestController();
@Mock
private GeneralService service;
@Mock
private Logger loggerMock;
@Mock
private HttpServletRequest request;
@Mock
private HttpServletResponse response;
@Before
public void setUp() {
PowerMockito.mockStatic(LoggerFactory.class);
when(LoggerFactory.getLogger(any(Class.class))).
thenReturn(loggerMock);
}
@Test
public void doSomethingUsefulTest() {
controllerUT.doSomethingUseful(request, response);
assert(true);
}
}代码片段#3
Failed to auto configure default logger context
Reported exception:
ch.qos.logback.core.joran.spi.JoranException: Parser configuration error occurred
at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:86)
at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:57)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:132)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:96)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:55)
at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75)
at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148)
at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:84)
at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:54)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:265)
at com.basicservice.controller.TestController.<clinit>(TestController.java:39)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at javassist.runtime.Desc.getClassObject(Desc.java:43)
at javassist.runtime.Desc.getClassType(Desc.java:152)
at javassist.runtime.Desc.getType(Desc.java:122)
at javassist.runtime.Desc.getType(Desc.java:78)
at com.basicservice.controller.TestControllerTest.<init>(TestControllerTest.java:44)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.createTestInstance(PowerMockJUnit44RunnerDelegateImpl.java:188)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.createTest(PowerMockJUnit44RunnerDelegateImpl.java:173)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:195)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:148)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:102)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:42)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: org.apache.xerces.jaxp.SAXParserFactoryImpl cannot be cast to javax.xml.parsers.SAXParserFactory
at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:128)
at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:79)
... 42 more代码片段#4
@RunWith(PowerMockRunner.class)
@PrepareForTest({TestController.class, LoggerFactory.class})
public class TestControllerTest {
private TestController controllerUT;
@Mock
private GeneralService service;
@Mock
private Logger loggerMock;
@Mock
private HttpServletRequest request;
@Mock
private HttpServletResponse response;
@Before
public void setUp() {
PowerMockito.mockStatic(LoggerFactory.class);
when(LoggerFactory.getLogger(any(Class.class))).
thenReturn(loggerMock);
}
@Test
public void doSomethingUsefulTest() {
controllerUT = new TestController();
controllerUT.doSomethingUseful(request, response);
assert(true);
}
}回答 1
Stack Overflow用户
发布于 2012-10-23 23:22:43
需要记住的一点是，@InjectMocks尊重静态和最终字段，即它不会在静态或最终字段中注入模拟。还请注意，PowerMock必须生成一个新的ClassLoader才能“检测”类，这可能解释了代码片段#3。
虽然我没有探究您的项目的来龙去脉，但如果您想使用PowerMock，我相信您可能希望准备所有的Logback/slf4j类。请记住，Powermock和Mockito是不同的项目，可能不会像人们想象的那样一起工作。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/13038976
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