This matcher will test that email is sent properly
describe User do
it { should have_sent_email.with_subject(/is spam$/) }
it { should have_sent_email.from('do-not-reply@example.com') }
it { should have_sent_email.with_body(/is spam\./) }
it { should have_sent_email.to('myself@me.com') }
it { should have_sent_email.with_subject(/spam/).
from('do-not-reply@example.com').
with_body(/spam/).
to('myself@me.com') }
end