Spying on Classes of the Same Namespace

Question

I'm creating spies for two classes belonging to the same namespace with the goal of expecting each to receive specific arguments:

allow(SibApiV3Sdk::SendSmtpEmail).to receive(:new).and_return(seb_send_email)
allow(SibApiV3Sdk::SMTPApi).to receive(:new).and_return(seb_smtp_api)

def seb_send_email
  @seb_smtp_api ||= SibApiV3Sdk::SendSmtpEmail.new(email_params)
end

def seb_smtp_api
  @seb_smtp_api ||= SibApiV3Sdk::SMTPApi.new
end

When I do, the second spy fails to work properly and returns the first spied object instead. I suspect this has something to do with it being a namespaced class. Is this the expected behavior and is there an alternative approach for handling namespaced class spies?

the instance variable name in both methods is the same, so once you call the first method, you have already set the value, thus the `=` of the `||=` doesn't get called, and it just returns the already set value. Perhaps you meant `def seb_send_email; @seb_send_email ||= ... ` — Simple Lime, Jul 15 '18 at 20:40

score 2 · Accepted Answer · answered Jul 15 '18 at 20:59

You assign both to @seb_smtp_api variable and that's the source of your problems.

You probably call the seb_send_email method first, then it's memoized as @seb_smtp_api and when you call seb_smtp_api it just returns the memoized value.

You can check that by replacing allow with expect and see that SibApiV3Sdk::SMTPApi's new method is never called.

Spying on Classes of the Same Namespace

1 Answers1