The RSpec way of doing this? Need help on validating block

Testing RSpec
1

Hello, I’m back again with more questions about mocks and how to do good
testing in general. Let’s say I’m writing this EmailSender class and I
want to make it totally awesomely tested with RSpec. Here’s how far I’ve
gotten so far:

require ‘net/smtp’

class EmailSender
def send_email
mailer.start(‘your.smtp.server’, 25) do |smtp|
smtp.send_message(“Yay! You got an email!”, ‘your@mail’,
‘other@mail’)
end
def

def mailer
Net::SMTP
end
end

describe EmailSender do
it “Should use Net::SMTP to send email”
es = EmailSender.new
es.mailer.should == Net::SMTP
MockSMTP = mock(“Net::SMTP”)
def es.mailer
MockSMTP
end
MockSMTP.should_receive(:start).with(‘your.smtp.server’, 25)
#but, er…wha?
end
end

So - not sure how to validate the part where “send_message” is called.
Is there a recommended way of doing this?

2

Yikes, left out the all-important call:

describe EmailSender do
it “Should use Net::SMTP to send email”
es = EmailSender.new
es.mailer.should == Net::SMTP
MockSMTP = mock(“Net::SMTP”)
def es.mailer
MockSMTP
end
MockSMTP.should_receive(:start).with(‘your.smtp.server’, 25)
#but, er…wha?
es.send_email
end
end

Sorry about that.

3

Ha! Don’t I feel silly. Just figured it out, I think.

Sebastian W. wrote:

Yikes, left out the all-important call:

describe EmailSender do
it “Should use Net::SMTP to send email”
es = EmailSender.new
es.mailer.should == Net::SMTP
MockSMTP = mock(“Net::SMTP”)
def es.mailer
MockSMTP
end
mock_smtp = mock(“smtp”)
MockSMTP.should_receive(:start).with(‘your.smtp.server’,
25).and_yield(mock_smtp)
mock_smtp.should_recieve(:send_message).with(“Yay! You got an
email!”, ‘your@mail’,
‘other@mail’)
es.send_email

end
end

Mission accomplished. :stuck_out_tongue:

4

Glad I could help!

“Sebastian W.” [email protected] writes: