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POGet java.lang.NullPointerException when tried to mock private method with mockito and powermock
 

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  1. POGet java.lang.NullPointerException when tried to mock private method with mockito and powermock
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    <p>I am trying to mock a private method with mockito/powermock. I get NullpointerException<br> The simple example I am trying to do is:</p> <p><strong>Actual class</strong></p> <pre><code>import com.siriusforce.plugin.common.PluginSystem; import com.wellsfargo.core.business.service.dp.fulfillment.MockitoBusinessService; public class MockitoBusinessOperationImpl implements MockitoBusinessOperation{ private MockitoBusinessService mockitoBusinessService = PluginSystem.INSTANCE.getPluginInjector().getInstance(MockitoBusinessService.class); private Long Id; public String creditAproved( Long Id){ System.out.println("Came Inside MockitoBusinessOperationImpl"); this.Id = Id; if (this.Id != null){ System.out.println("Inside creditaproved If statement"); String Report = mockitoBusinessService.creditReport(this.Id); System.out.println("Mock Object Injected from test class "+ Report); return Report; } else return "Went to Else Part"; } private String inTestMethod(Long Id){ return "this is working"; } } </code></pre> <p><strong>Test Class:</strong></p> <pre><code>import static org.mockito.Mockito.spy; import static org.mockito.Mockito.when; import static org.powermock.api.mockito.PowerMockito.doReturn; import org.mockito.InjectMocks; import org.mockito.Mock; import org.mockito.MockitoAnnotations; import org.powermock.core.classloader.annotations.PrepareForTest; import org.testng.annotations.BeforeMethod; import org.testng.annotations.Test; import com.siriusforce.plugin.common.PluginSystem; public class MockitoBusinessServiceTest { @Mock MockitoBusinessService MockitoBusinessService ; @InjectMocks private MockitoBusinessOperation MockitoBusinessOperation = PluginSystem.INSTANCE.getPluginInjector().getInstance(MockitoBusinessOperation.class); private Long Id; @BeforeMethod public void init() { MockitoAnnotations.initMocks(this); this.Id = 123L; } @PrepareForTest(MockitoBusinessOperation.class) @Test(enabled = true) public void testReCalculatePrepaids() throws Exception { MockitoBusinessOperation = spy(MockitoBusinessOperation); doReturn("this will work hopefully").when(MockitoBusinessOperation, "inTestMethod", this.Id); when(MockitoBusinessService.creditReport(this.Id)).thenReturn(new String("Decline by only Me")); String mainReport = MockitoBusinessOperation.creditAproved(this.Id); System.out.println("Indirect Call from actual class MainReport " + mainReport); } } </code></pre> <p>When I try to run this I get a <code>NullPointerException</code>: any suggestion solving this or any other way mocking a private method. I don't want to use the suggestion given for making the method protected which mean changing the actual method. I don't want any changes to the actual </p> <pre><code>class method &lt;failure type="java.lang.NullPointerException"&gt;java.lang.NullPointerException at org.powermock.api.mockito.internal.expectation.PowerMockitoStubberImpl.addAnswersForStubbing(PowerMockitoStubberImpl.java:68) at org.powermock.api.mockito.internal.expectation.PowerMockitoStubberImpl.prepareForStubbing(PowerMockitoStubberImpl.java:123) at org.powermock.api.mockito.internal.expectation.PowerMockitoStubberImpl.when(PowerMockitoStubberImpl.java:91) at com.wellsfargo.core.business.service.dp.fulfillment.MockitoBusinessServiceTest.testReCalculatePrepaids(MockitoBusinessServiceTest.java:54) </code></pre> <p></p>
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    1. USRoddy of the Frozen Peas
    1. USjan
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    1. COI figure out the NullPointerException: by just adding PowerMockito to the spy method. 'MockitoBusinessOperation = PowerMockito.spy(MockitoBusinessOperation);' Now the problem is with mocking the private method though I have mocked the private method but it still getting call. [In another post](http://stackoverflow.com/questions/8057607/when-mocking-private-method-with-powermock-but-underlying-method-still-gets-cal?rq=1) someone has posted this issue. but the solution is not working for me. any suggestion why is the mock doesn't get reflected as it suppose to be.
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      1. USjan
    2. COAre you using the doWhen() style mocking? Can you post a new code sample or modify your question?
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      1. POGet java.lang.NullPointerException when tried to mock private method with mockito and powermock
      1. USMatt Lachman
 

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