问题
I have the following jars:
javax.servlet-api-3.1.9.jar
junit-4.10.jar
mockito-all-1.10.19.jar
mockito-core-1.10.19.jar
powermock-api-mockito-1.6.5.jar
powermock-api-mockito-common-1.6.5.jar
powermock-api-support-1.6.5.jar
powermock-core-1.6.5.jar
powermock-module-junit4-1.6.5.jar
powermock-reflect-1.6.5.jar
I want to test this method called createPanel which is inside a class called Controller:
public static void createPanel(HttpServletRequest req, HttpServletResponse res, HttpSession hs) throws IOException
{
PanelManager.createPanel(req, res, hs);
}
In the ControllerTest class (junit tester), I have this:
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import ApplicationLogic.Controller;
import ApplicationLogic.PanelManager;
import ApplicationLogic.RegistrationManager;
import ApplicationLogic.SessionManager;
@PrepareForTest(PanelManager.class)
@RunWith(MockitoJUnitRunner.class)
public class ControllerTest {
Controller controller = Mockito.mock(Controller.class);
SessionManager sessionManager = Mockito.mock(SessionManager.class);
RegistrationManager registrationManager = Mockito.mock(RegistrationManager.class);
.
.
.
.
@Test
public void testcreatePanel() throws ServletException, IOException{
HttpServletRequest req = Mockito.mock(HttpServletRequest.class);
HttpServletResponse res = Mockito.mock(HttpServletResponse.class);
HttpSession hs = Mockito.mock(HttpSession.class);
//PowerMockito.mock(SessionManager.class);
PrintWriter writer = new PrintWriter("somefile.txt");
when(res.getWriter()).thenReturn(writer);
PowerMockito.mockStatic(Controller.class);
PowerMockito.doCallRealMethod().when(controller).createPanel(req, res, hs);
All the tests for the other methods in the controller class are running fine. Why it is causing this error at PowerMockito.doCallRealMethod():
org.powermock.api.mockito.ClassNotPreparedException:
The class ApplicationLogic.Controller not prepared for test.
To prepare this class, add class to the '@PrepareForTest' annotation.
In case if you don't use this annotation, add the annotation on class or method level.
at org.powermock.api.mockito.expectation.reporter.MockitoPowerMockReporter.classNotPrepared(MockitoPowerMockReporter.java:31)
at org.powermock.api.mockito.internal.mockcreation.MockTypeValidatorFactory$DefaultMockTypeValidator.validate(MockTypeValidatorFactory.java:38)
at org.powermock.api.mockito.internal.mockcreation.AbstractMockCreator.validateType(AbstractMockCreator.java:18)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.createMock(MockCreator.java:57)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.mock(MockCreator.java:47)
at org.powermock.api.mockito.PowerMockito.mockStatic(PowerMockito.java:71)
at JUnitTest.ControllerTest.testcreatePanel(ControllerTest.java:253)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(JUnit45AndHigherRunnerImpl.java:37)
at org.mockito.runners.MockitoJUnitRunner.run(MockitoJUnitRunner.java:62)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
回答1:
It seems like you're missing the PowerMockRule declaration:
@Rule
public PowerMockRule rule = new PowerMockRule();
Also, keep in mind that you should let Powermock know that it shouldn't load mockito classes to the system class loader. Add the following code at the top of your class:
@PowerMockIgnore({"org.mockito.*"})
Your class declaration should look like this:
@PrepareForTest(PanelManager.class)
@RunWith(MockitoJUnitRunner.class)
@PowerMockIgnore({"org.mockito.*"})
public class ControllerTest {
@Rule
public PowerMockRule rule = new PowerMockRule();
//...
}
回答2:
You have to use the PowerMockRunner instead of the MockitoJUnitRuner.
This example addresses the ClassNotPreparedException:
@RunWith(PowerMockRunner.class)
@PrepareForTest({PanelManager.class})
public class ControllerTest {
Controller controller = Mockito.mock(Controller.class);
@Test
public void testcreatePanel() throws Exception {
HttpServletRequest req = Mockito.mock(HttpServletRequest.class);
HttpServletResponse res = Mockito.mock(HttpServletResponse.class);
HttpSession hs = Mockito.mock(HttpSession.class);
PrintWriter writer = new PrintWriter("somefile.txt");
Mockito.when(res.getWriter()).thenReturn(writer);
PowerMockito.mockStatic(PanelManager.class);
PowerMockito.doCallRealMethod().when(controller).createPanel(req, res, hs);
}
}
However, it looks like there might still be some issues even after that; you are mocking Controller and then treating it as a partial mock by invoking doCallRealMethod() on it. Perhaps there is a genuine reason for this (maybe that reason would be revealed by showing more of your code) but if you do not have a genuine reason for that then you could remove this line:
Controller controller = Mockito.mock(Controller.class);
And replace this line ...
PowerMockito.doCallRealMethod().when(controller).createPanel(req, res, hs);
with this:
Controller.createPanel(req, res, hs);
This would then allow you to mock the behaviour of PanelManager and test the actual behaviour of Controller in response to the PanelManager's mocked behaviour.
来源：https://stackoverflow.com/questions/46624589/powermockito-classnotpreparedexception