具有PowerMockRunner的静态功能

Question

我有一个从缓存实例中获取数据的函数，我需要对其进行模拟

public List<Map<String, Object>> getDuplicateCheckNotificationJSON(String identityAction) {
        IdentityActions identityActions = IdentityActionsCache.getInstance().getIdentityActionsByName(identityAction);


        List<RequestCategoryView> requestCategoryViews= identityActions.getReqCategory().getReqCategoryViews();
        for (RequestCategoryView requestCategoryView : requestCategoryViews) {
        ...
        }
        return null;
    }

IdentityActionsCache类

public static IdentityActionsCache getInstance() {
        if(null == singleton) {
            singleton = new IdentityActionsCache();
            singleton.init();
        }
        return singleton;
    }

public IdentityActions getIdentityActionsByName(String actionName){
    xyz
    return result;
}

带有powermock的Junit

@RunWith(PowerMockRunner.class)
@PrepareForTest({IdentityService.class, IdentityActionsCache.class})
public class IdentityServiceTest  {

@InjectMocks
IdentityService identityService;



 @Test
    public void getDuplicateCheckNotificationJSONTest() {
        List<Map<String, Object>> result;
        try {
            PowerMockito.mockStatic(ServiceLocator.class);
            PowerMockito.mockStatic(IdentityActionsCache.class);
            when(ServiceLocator.findService("workflowConfigDataService")).thenReturn(workflowConfigDataService);

            IdentityActions identityActions = new IdentityActions();

when(IdentityActionsCache.getInstance().getIdentityActionsByName(action)).thenReturn(identityActions);

            result = identityService.getDuplicateCheckNotificationJSON(action);


            assertTrue(result.equals(1l));
        } catch (ALNTApplicationException e) {
            assertFalse(false);
        } 
    }
}

我无法模拟IdentityActionsCache.getInstance（）。getIdentityActionsByName（action）获取空指针

java.lang.NullPointerException在com.alnt.idm.user.identity.services.IdentityServiceTest.getDuplicateCheckNotificationJSONTest（IdentityServiceTest.java:70）在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处在sun.reflect.NativeMethodAccessorImpl.invoke（未知来源）在sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）在java.lang.reflect.Method.invoke（未知来源）在org.junit.internal.runners.TestMethod.invoke（TestMethod.java:68）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl $ PowerMockJUnit44MethodRunner.runTestMethod（PowerMockJUnit44RunnerDelegateImpl.java:310）处在org.junit.internal.runners.MethodRoadie $ 2.run（MethodRoadie.java:89）在org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters（MethodRoadie.java:97）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl $ PowerMockJUnit44MethodRunner.executeTest（PowerMockJUnit44RunnerDelegateImpl.java:294）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl $ PowerMockJUnit47MethodRunner.executeTestInSuper（PowerMockJUnit47RunnerDelegateImpl.java:127）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl $ PowerMockJUnit47MethodRunner.executeTest（PowerMockJUnit47RunnerDelegateImpl.java:82）处在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl $ PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters（PowerMockJUnit44RunnerDelegateImpl.java:282）上在org.junit.internal.runners.MethodRoadie.runTest（MethodRoadie.java:87）在org.junit.internal.runners.MethodRoadie.run（MethodRoadie.java:50）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod（PowerMockJUnit44RunnerDelegateImpl.java:207）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods（PowerMockJUnit44RunnerDelegateImpl.java:146）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl $ 1.run（PowerMockJUnit44RunnerDelegateImpl.java:120）在org.junit.internal.runners.ClassRoadie.runUnprotected（ClassRoadie.java:34）在org.junit.internal.runners.ClassRoadie.runProtected（ClassRoadie.java:44）在org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run（PowerMockJUnit44RunnerDelegateImpl.java:122）在org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run（JUnit4TestSuiteChunkerImpl.java:106）在org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run（AbstractCommonPowerMockRunner.java:53）在org.powermock.modules.junit4.PowerMockRunner.run（PowerMockRunner.java:59）在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:86）在org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:538）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:760）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:460）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:206）

Answer 1

这是因为您需要模拟静态和实例调用

@RunWith(PowerMockRunner.class)
@PrepareForTest({IdentityService.class, IdentityActionsCache.class})
public class IdentityServiceTest  {

    @InjectMocks
    IdentityService identityService;

    @Test
    public void getDuplicateCheckNotificationJSONTest() {
        List<Map<String, Object>> result;
        try {
            //Arrange

            //...other members missing

            PowerMockito.mockStatic(ServiceLocator.class);
            when(ServiceLocator.findService("workflowConfigDataService"))
                .thenReturn(workflowConfigDataService);

            IdentityActions identityActions = new IdentityActions();
            IdentityActionsCache cacheMock = mock(IdentityActionsCache.class); //instance mock
            when(cacheMock.getIdentityActionsByName(action)).thenReturn(identityActions);

            PowerMockito.mockStatic(IdentityActionsCache.class);
            when(IdentityActionsCache.getInstance()).thenReturn(cacheMock); //static call returns instance

            //Act
            result = identityService.getDuplicateCheckNotificationJSON(action);

            //Assert
            assertTrue(result.equals(1l));
        } catch (ALNTApplicationException e) {
            assertFalse(false);
        } 
    }
}