How to check property of function argument in NMock

Question

Say if i had the following interface mocked in (NMock). How could i check that email.Subject = 'xyz' ?

Currently im doing something like

IEmailService s = mocks.NewMock<IEmailService>();
Expect.Once.On(s).Method("Send").With(?????)

s.Send(new Email { Subject = 'rarr' });

mocks.Verify...();

interface EmailService { void SendEmail(Email email); }

Answer 1

You can use a Has.Property matcher like this:

IEmailService s = mocks.NewMock<IEmailService>();

Expect.Once.On(s).Method("Send").
    With(Has.Property("Subject", Is.EqualTo("rarr")));

s.Send(new Email { Subject = 'rarr' });
mocks.Verify...();

Or you could write a custom matcher to verify that the argument is of the type Email and that its Subject property has the correct value.