SecurityManager引发异常的java Mockito模拟

Question

我试图模仿SecurityManager类。当我运行以下代码时，Mockito抛出一个异常：

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

堆栈跟踪是指以下几行无限期重复：

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)

我做错了什么

Answer 1

更改SecurityManager时，应在测试后将其重置为原始SecurityManager

您可以使用System Rules库进行测试。设置和重置安全管理器只是使用此规则的两行代码

@Rule
public ProvideSecurityManager provideSecurityManager
  = new ProvideSecurityManager(yourSecurityManager);

在测试中使用SecurityManager，在测试之外使用原始安全管理器