public void IsValidTest()
{
//Arrange
ICommand innerCommand = MockRepository.GenerateStrictMock <ICommand>();
innerCommand.Expect(ic => ic.IsValid()).
Repeat.Once().
Return(true);
SwitchCommand command = new SwitchCommand(innerCommand);
//Act
bool isValidResult = command.IsValid();
//Assert
Assert.IsTrue(isValidResult);
innerCommand.VerifyAllExpectations();
}