AmbiguousReturnError

I’m trying to use RSpec to test some screen-scraping code. Because I
don’t want to hit external websites for my tests, I’m stubbing out the
html I expect to receive, and trying to focus my tests on making sure
the code is parsing the html correctly, and submitting the correct
values when requesting external pages.

However, I’m running into a problem. The following code causes RSpec
to raise a “Spec::Mocks::AmbiguousReturnError” exception:

@agent.should_receive(:submit) do |form, form_button|
form.class.should == Mechanize::Form
form.username.should == ‘username’
form.password.should == ‘password’
end.and_return(@bad_login_page)

Am I doing something incorrectly here, or is the problem just that
RSpec doesn’t like for explicit return values to be specified when a
block is supplied to the message expectation? If it is the latter,
what would be the recommendation for how to appropriately write this
spec?

Thanks.

On Mar 14, 2010, at 2:20 PM, barunio wrote:

form.class.should == Mechanize::Form
form.username.should == ‘username’
form.password.should == ‘password’
end.and_return(@bad_login_page)

When you pass a block to should_receive or stub, rspec wants to return
the value returned by the block:

@agent.should_receive(:submit) do |form, form_button|
form.class.should == Mechanize::Form
form.username.should == ‘username’
form.password.should == ‘password’
@bad_login_page
end

HTH,
David

Ah, of course. Thanks, David, this works.

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