C# CodeAccessSecurityAttribute的模拟自定义实现
我有一个自定义的实现,即连接外部源以进行验证C# CodeAccessSecurityAttribute的模拟自定义实现,c#,unit-testing,moq,C#,Unit Testing,Moq,我有一个自定义的实现,即连接外部源以进行验证 [Serializable] [AttributeUsage(AttributeTargets.Method)] public class IsAuthorizedAttribute : CodeAccessSecurityAttribute { private static readonly PrincipalPermission Allowed = new PrincipalPermission(PermissionState.None)
[Serializable]
[AttributeUsage(AttributeTargets.Method)]
public class IsAuthorizedAttribute : CodeAccessSecurityAttribute
{
private static readonly PrincipalPermission Allowed = new PrincipalPermission(PermissionState.None);
private static readonly PrincipalPermission NotAllowed = new PrincipalPermission(PermissionState.Unrestricted);
public string EntityObject { get; set; }
public string Field { get; set; }
public char Expected { get; set; }
public IsAuthorizedAttribute(SecurityAction action)
: base(action)
{
//setup
}
public override IPermission CreatePermission()
{
return IsAuthorised(EntityObject, Field, Expected, ServicesConfiguration) ? Allowed : NotAllowed;
}
private static bool IsAuthorised(string entityObject, string field, char expected, ServicesConfiguration servicesConfiguration)
{
bool? response = null;
//check external stuff
return response ?? false;
}
}
我已使用此属性装饰我的方法:
[IsAuthorized(SecurityAction.Demand, EntityObject = Fields.UserManagement, Field = Fields.AllowDisplay, Expected = '1')]
public List<Group> GetUserGroups()
{
var response = new List<Group>();
//Get the groups from the database
var groups = groupManager.FindAll();
//Map them to the output group type
response = groups.Select(x => new Group()
{
ID = x.ID,
Name = x.Name,
Alias = x.Alias,
Description = x.Description
}).ToList();
return response;
}
[TestMethod]
public void GetUserGroups_UserGroupsFound_UserGroupsReturned()
{
Smock.Run(context =>
{
//Arrange
Setup();
m_Container
.RegisterMock<IGroupManager>()
.Setup(x => x.FindAllFromCache())
.Returns(new List<Concept.Security.MasterData.Domain.Group>()
{
new Concept.Security.MasterData.Domain.Group()
{
Name = "MyUserGroup",
Alias = "My User Group",
Description = "My user group description",
System = false,
Authorizations = "000001111100000000"
},
new Concept.Security.MasterData.Domain.Group()
{
Name = "MySecondUserGroup",
Alias = "My Second User Group",
Description = "My second user group description",
System = false,
Authorizations = "000000000000000000"
}
});
var identityService = new UserManagementService(m_Container, m_UserAuthorizationManager.Object, m_IdentityService.Object);
//** begin add mocked attribute **//
//** end add mocked attribute **//
//Act
var response = identityService.GetUserGroups();
//Assert
Assert.AreEqual(2, response.Count);
Assert.AreEqual(1, response.Where(x => x.Alias == "MyUserGroup").Count());
Assert.AreEqual(1, response.Where(x => x.Alias == "MySecondUserGroup").Count());
Assert.AreEqual(2, response.Where(x => x.Authorizations == null).Count());
});
}
//** begin add mocked attribute **//
var identityService = new UserManagementService(m_Container, m_UserAuthorizationManager.Object, m_IdentityService.Object);
var IsAuthorizedAttribute = new Mock<IsAuthorizedAttribute>(MockBehavior.Strict, new object[] { SecurityAction.Demand });
IsAuthorizedAttribute.Setup(x => x.CreatePermission()).Returns(new PrincipalPermission(PermissionState.None));
TypeDescriptor.AddAttributes(identityService, IsAuthorizedAttribute.Object);
//** end add mocked attribute **//
现在我想对这个方法进行单元测试,但是属性被激发了。我尝试过一些东西来嘲弄这个属性,但没有成功
我用的是最小起订量和最小起订量
这是我的单元测试,没有该属性的模拟实例:
[IsAuthorized(SecurityAction.Demand, EntityObject = Fields.UserManagement, Field = Fields.AllowDisplay, Expected = '1')]
public List<Group> GetUserGroups()
{
var response = new List<Group>();
//Get the groups from the database
var groups = groupManager.FindAll();
//Map them to the output group type
response = groups.Select(x => new Group()
{
ID = x.ID,
Name = x.Name,
Alias = x.Alias,
Description = x.Description
}).ToList();
return response;
}
[TestMethod]
public void GetUserGroups_UserGroupsFound_UserGroupsReturned()
{
Smock.Run(context =>
{
//Arrange
Setup();
m_Container
.RegisterMock<IGroupManager>()
.Setup(x => x.FindAllFromCache())
.Returns(new List<Concept.Security.MasterData.Domain.Group>()
{
new Concept.Security.MasterData.Domain.Group()
{
Name = "MyUserGroup",
Alias = "My User Group",
Description = "My user group description",
System = false,
Authorizations = "000001111100000000"
},
new Concept.Security.MasterData.Domain.Group()
{
Name = "MySecondUserGroup",
Alias = "My Second User Group",
Description = "My second user group description",
System = false,
Authorizations = "000000000000000000"
}
});
var identityService = new UserManagementService(m_Container, m_UserAuthorizationManager.Object, m_IdentityService.Object);
//** begin add mocked attribute **//
//** end add mocked attribute **//
//Act
var response = identityService.GetUserGroups();
//Assert
Assert.AreEqual(2, response.Count);
Assert.AreEqual(1, response.Where(x => x.Alias == "MyUserGroup").Count());
Assert.AreEqual(1, response.Where(x => x.Alias == "MySecondUserGroup").Count());
Assert.AreEqual(2, response.Where(x => x.Authorizations == null).Count());
});
}
//** begin add mocked attribute **//
var identityService = new UserManagementService(m_Container, m_UserAuthorizationManager.Object, m_IdentityService.Object);
var IsAuthorizedAttribute = new Mock<IsAuthorizedAttribute>(MockBehavior.Strict, new object[] { SecurityAction.Demand });
IsAuthorizedAttribute.Setup(x => x.CreatePermission()).Returns(new PrincipalPermission(PermissionState.None));
TypeDescriptor.AddAttributes(identityService, IsAuthorizedAttribute.Object);
//** end add mocked attribute **//
运行此操作会导致异常,因为该属性尝试连接外部服务,但它们没有也无法设置为接收请求
因此,我尝试添加一个模拟属性:
[IsAuthorized(SecurityAction.Demand, EntityObject = Fields.UserManagement, Field = Fields.AllowDisplay, Expected = '1')]
public List<Group> GetUserGroups()
{
var response = new List<Group>();
//Get the groups from the database
var groups = groupManager.FindAll();
//Map them to the output group type
response = groups.Select(x => new Group()
{
ID = x.ID,
Name = x.Name,
Alias = x.Alias,
Description = x.Description
}).ToList();
return response;
}
[TestMethod]
public void GetUserGroups_UserGroupsFound_UserGroupsReturned()
{
Smock.Run(context =>
{
//Arrange
Setup();
m_Container
.RegisterMock<IGroupManager>()
.Setup(x => x.FindAllFromCache())
.Returns(new List<Concept.Security.MasterData.Domain.Group>()
{
new Concept.Security.MasterData.Domain.Group()
{
Name = "MyUserGroup",
Alias = "My User Group",
Description = "My user group description",
System = false,
Authorizations = "000001111100000000"
},
new Concept.Security.MasterData.Domain.Group()
{
Name = "MySecondUserGroup",
Alias = "My Second User Group",
Description = "My second user group description",
System = false,
Authorizations = "000000000000000000"
}
});
var identityService = new UserManagementService(m_Container, m_UserAuthorizationManager.Object, m_IdentityService.Object);
//** begin add mocked attribute **//
//** end add mocked attribute **//
//Act
var response = identityService.GetUserGroups();
//Assert
Assert.AreEqual(2, response.Count);
Assert.AreEqual(1, response.Where(x => x.Alias == "MyUserGroup").Count());
Assert.AreEqual(1, response.Where(x => x.Alias == "MySecondUserGroup").Count());
Assert.AreEqual(2, response.Where(x => x.Authorizations == null).Count());
});
}
//** begin add mocked attribute **//
var identityService = new UserManagementService(m_Container, m_UserAuthorizationManager.Object, m_IdentityService.Object);
var IsAuthorizedAttribute = new Mock<IsAuthorizedAttribute>(MockBehavior.Strict, new object[] { SecurityAction.Demand });
IsAuthorizedAttribute.Setup(x => x.CreatePermission()).Returns(new PrincipalPermission(PermissionState.None));
TypeDescriptor.AddAttributes(identityService, IsAuthorizedAttribute.Object);
//** end add mocked attribute **//
但是这个调用了我设置外部源的属性的构造函数。当我将此构造函数放入try/catch并以静默方式处理异常时,ISAuthorizeDatAttribute上出现错误。找不到对象
还有哪些选项不触发该属性?构造函数不应访问外部;否则,正如您所知,很难绕过测试 一个简单的方法是使静态布尔场绕过。这看起来不太好,但也许足够了
public class IsAuthorizedAttribute : CodeAccessSecurityAttribute
{
// set true in the test initialization
private static bool s_byPass;
public IsAuthorizedAttribute(SecurityAction action) : base(action)
{
if (!s_byPass)
{
// setup
}
}
private static bool IsAuthorised(string entityObject, string field, char expected, ServicesConfiguration servicesConfiguration)
{
if (s_byPass) { return true; }
//check external stuff
}
}
另一个更好的方法是将外部依赖项提取到另一个类,以便可以模拟它。模拟外部依赖关系是单元测试的典型模式
public class IsAuthorizedAttribute : CodeAccessSecurityAttribute
{
// set mock here in the test initialization.
// I assume external accessor can be a static field.
private static ExternalAccessor m_accessor = new ExternalAccessor();
private static bool IsAuthorised(string entityObject, string field, char expected, ServicesConfiguration servicesConfiguration)
{
return m_accessor.Check();
}
}
public class ExternalAccessor
{
private bool m_initialized;
private void Setup()
{
// setup
m_initialized = true;
}
public virtual bool Check()
{
// You can call setup anytime but the constructor.
if (!m_initialized) { Setup(); }
// check external stuff
}
}
您必须提供一个可用于重现问题的属性。另一方面,这清楚地表明该属性试图执行过多的ie单一责任原则SRP违反。违背了与.net实践相关的属性的预期目的。@CyclingFreak您能详细介绍一下。。。当我将此构造函数放入try/catch并静默处理异常时,ISAuthorizeDatAttribute.Object对象上出现错误。您面临什么异常?你用什么方法面对它?我用了第二种方法。我应该自己考虑使用一个可以被嘲笑的外部类。