如何模拟 CasOperations.GetImpairedNodesFromCASpectrumAsync()
方法,以便它返回模拟值?目前,我遇到异常(显示在代码示例下方)。
我有以下设置:
要模拟的类和属性:
public class BranchCircuitStatusScheduleEntry : NWatchCustomScheduleEntryBase, INWatchCustomScheduleEntry
{
public BranchCircuitStatusScheduleEntry(INWatchSchedulerApplication application)
: base(application, DevOpsScheduleFrequency.Minute, 15, 0, DevOpsScheduleFlags.Always)
{
// Some initialization for below properties
CasOperations = new CasOperations(cas, EntityService, IsBranchesOnly);
}
public CasOperations CasOperations { get; private set; }
}
public class CasOperations
{
public CasOperations(CasApi casApi, BranchCircuitEntityService entityService, bool isBranchesOnly)
{
CAS = casApi;
this.entityService = entityService;
this.isBranchesOnly = isBranchesOnly;
}
}
尝试执行模拟的测试:
[TestMethod]
public void DownNodeRediscoveredInSpectrum()
{
var mock = new Mock<BranchCircuitStatusScheduleEntry>(_application);
mock.CallBase = true;
// Spectrum's artificial response with a model with the same name, but a "new" model handle
var mockedNewlyImpairedNodes = new NetworkDeviceNodeStatus[]
{
new NetworkDeviceNodeStatus
{
// Not important
}
};
mock.Setup(x =>
x.CasOperations.GetImpairedNodesFromCASpectrumAsync()).ReturnsAsync(mockedNewlyImpairedNodes);
}
测试抛出的异常:
An exception of type 'Castle.DynamicProxy.InvalidProxyConstructorArgumentsException' occurred in Moq.dll but was not handled in user code Additional information: Can not instantiate proxy of class: NWatch.NetworkCircuits.CasOperations. Could not find a parameterless constructor.
最佳答案
让我试一试:
在模拟设置中,您并不是要模拟 BranchCircuitStatusScheduleEntry
的行为,但是 CasOperations
的行为类(class)。所以你真的需要一个 Mock<CasOperations>
目的。或者更好的是 Mock<ICasOperations>
正如@Jonesopolis 在他的评论中所说。
此外,在 BranchCircuitStatusScheduleEntry
构造函数您正在初始化该类的实例和 CasOperations
的实例.如果你初始化 CasOperations
的实例会更好外面BranchCircuitStatusScheduleEntry
构造函数并将其作为参数传递。
所以它会是这样的:
public class BranchCircuitStatusScheduleEntry : NWatchCustomScheduleEntryBase, INWatchCustomScheduleEntry
{
public BranchCircuitStatusScheduleEntry(INWatchSchedulerApplication application, ICasOperations casOperations)
: base(application, DevOpsScheduleFrequency.Minute, 15, 0, DevOpsScheduleFlags.Always)
{
CasOperations = casoperations;
}
public CasOperations CasOperations { get; private set; }
}
最后,您创建模拟,设置它并将其作为参数传递给 BranchCircuitStatusScheduleEntry
构造函数:
var casMock = new Mock<ICasOperations>();
casMock.Setup(x => x.GetImpairedNodesFromCASpectrumAsync()).ReturnsAsync(mockedNewlyImpairedNodes);
var mock = new Mock<BranchCircuitStatusScheduleEntry>(_application, casMock.Object);
mock.CallBase = true;
请注意,这可能是 BranchCircuitStatusScheduleEntry
的最后一个实例不应是模拟对象,而应是真实对象(被测实例)。
关于c# - Moq - 不能模拟类属性的方法返回值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37400345/