c# - 模拟方法以返回某些参数并为所有其他参数抛出异常

Question

我正在使用 Moq 来模拟一个方法:

public class DbService : IDbService
{
    public Record GetRecord(Guid Id)
    {
        // Returns the record if exists.
        // Throws exception if record not found.
    }
}

我想对此进行模拟，如果我传递这三个 guid，它会返回记录，并且对于所有其他 Guid 会引发异常。

Guid id = Guid.NewGuid();
Guid id2 = Guid.NewGuid();
Guid id3 = Guid.NwGuid();

var mock = new Mock<IDbService>();
mock.Setup(t => t.GetRecord(id)).Returns(record1);
mock.Setup(t => t.GetRecord(id2)).Returns(record2);
mock.Setup(t => t.GetRecord(id3)).Returns(record3);
// Throw exception for all other guids...

我该怎么做？

Answer 1

为此您可以使用 MockBehavior.Strict:

Guid id = Guid.NewGuid();
Guid id2 = Guid.NewGuid();
Guid id3 = Guid.NwGuid();

var mock = new Mock<IDbService>(MockBehavior.Strict);

mock.Setup(t => t.GetRecord(id)).Returns(record1);
mock.Setup(t => t.GetRecord(id2)).Returns(record2);
mock.Setup(t => t.GetRecord(id3)).Returns(record3);

// do stuff

// will throw if GetRecord was called with arguments
// that don't match to any configured setup.
mock.VerifyAll();