How to mock a class that implements multiple interfaces

Take a look at https://github.com/Moq/moq4/wiki/Quickstart

Advanced Features

// implementing multiple interfaces in mock
var foo = new Mock<IFoo>();
var disposableFoo = foo.As<IDisposable>();
// now IFoo mock also implements IDisposable :)
disposableFoo.Setup(df => df.Dispose());