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Editorial Team
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Asked: 2026-05-30T02:40:09+00:00

I’m trying to mock the SecurityManager class. When I run the following code, Mockito

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I’m trying to mock the SecurityManager class. When I run the following code, Mockito throws an exception:

@After
public void tearDown()
{
    SecurityManager securityManagerMock = mock(SecurityManager.class);
    System.setSecurityManager(securityManagerMock);
}

The stack trace is the following lines repeated indefinitely:

at org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:42)
at $java.lang.SecurityManager$$EnhancerByMockitoWithCGLIB$$3ceafc0f.checkMemberAccess(<generated>)
at java.lang.Class.checkMemberAccess(Class.java:2157)
at java.lang.Class.getDeclaredField(Class.java:1879)
at org.mockito.internal.creation.cglib.CGLIBHacker.reflectOnCreateInfo(CGLIBHacker.java:44)
at org.mockito.internal.creation.cglib.CGLIBHacker.setMockitoNamingPolicy(CGLIBHacker.java:20)
at org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:42)
at $java.lang.SecurityManager$$EnhancerByMockitoWithCGLIB$$3ceafc0f.checkMemberAccess(<generated>)
at java.lang.Class.checkMemberAccess(Class.java:2157)
at java.lang.Class.getDeclaredField(Class.java:1879)
at org.mockito.internal.creation.cglib.CGLIBHacker.reflectOnCreateInfo(CGLIBHacker.java:44)
at org.mockito.internal.creation.cglib.CGLIBHacker.setMockitoNamingPolicy(CGLIBHacker.java:20)
at org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:42)
at $java.lang.SecurityManager$$EnhancerByMockitoWithCGLIB$$3ceafc0f.checkMemberAccess(<generated>)
at java.lang.Class.checkMemberAccess(Class.java:2157)
at java.lang.Class.getDeclaredField(Class.java:1879)
at org.mockito.internal.creation.cglib.CGLIBHacker.reflectOnCreateInfo(CGLIBHacker.java:44)
at org.mockito.internal.creation.cglib.CGLIBHacker.setMockitoNamingPolicy(CGLIBHacker.java:20)

What am I doing wrong here?

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1 Answer

  1. Editorial Team

    PS! You could also mock static method call to getSecurityManager() method.

    Mocking Static Method
    See maunal at http://code.google.com/p/powermock/wiki/MockitoUsage

    Add @PrepareForTest at class level.

    @PrepareForTest(System.class); // System.class contains static methods

    Call PowerMockito.mockStatic() to mock a static class (use PowerMockito.mockStaticPartial(class, method) to mock a specific method):

    PowerMockito.mockStatic(System.class);

    Just use Mockito.when() to setup your expectation:

    Mockito.when(System.getSecurityManager()).thenReturn(securityManagerMock);
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