public void It_can_resolve_request()
{
var doubleInteger = new DoubleInteger(5);
var reply = _mediator.Request(doubleInteger);
Assert.AreEqual(10, reply.DoubledValue);
}
public void It_throws_an_exception_when_the_request_is_null()
{
DoubleInteger request = null;
Assert.Throws <ArgumentNullException>(() => _mediator.Request(request));
}