SecurityManager 的 Mockito 模拟抛出异常

2022-01-14 00:00:00 mockito java junit

我正在尝试模拟 SecurityManager 类.当我运行以下代码时，Mockito 会抛出异常:

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);
}

堆栈跟踪是以下几行无限重复:

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)

我在这里做错了什么?

推荐答案

PS！您还可以模拟对 getSecurityManager() 方法的静态方法调用.

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

模拟静态方法请参阅 http://code.google.com/p/powermock/wiki/MockitoUsage

在类级别添加@PrepareForTest.

Add @PrepareForTest at class level.

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

调用 PowerMockito.mockStatic() 模拟静态类(使用 PowerMockito.mockStaticPartial(class, method) 模拟特定方法):

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

PowerMockito.mockStatic(System.class);

只需使用 Mockito.when() 来设置您的期望:

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

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

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