I'm having a problems mocking successive return values. I don't know if I'm
doing something wrong or if this is a limitation of rspec mocks. Any ideas
of what I may be doing wrong?
I'm trying to test the generate_quote_number method. It generates a quote
number, looks to see if it is in the db already. If it is, it calls itself
to try again. I want to test that it looks in the database for matching
numbers until it finds one which does not exist already.
## The code
def generate_quote_number
quote_num = "MMQ#{self.random_string}-001"
if Policy.find(:first, :conditions => ["quote_number = ?", quote_num])
quote_num = generate_quote_number
end
quote_num
end
def random_string(size=8)
# return a random string
end
For the test, I simply lookup 3 existing quote numbers, append nil to the
end (for a total of 4)
## The test
it "should not generate a duplicate quote number" do
existing_quote_numbers = Policy.find(:all).map{|p| p.quote_number}[0,3]
@policy_service.should_receive(:random_string).with(:no_args).exactly(4).times.and_return(existing_quote_numbers.concat([nil]))
@policy_service.generate_quote_number
end
## The result
should not generate a duplicate quote number
Mock 'Service::Base' expected :random_string with (no args) 4 times, but
received it once
I verified "and_return" is actually returning the array rather than an
individual element of the existing_quote_numbers array which makes sense,
but what about this?
http://rspec.rubyforge.org/svn/branches/dogfood/spec/spec/mocks/mock_spec.rb
specify "should use a list of return values for successive calls" do
@mock.should_receive(:multi_call).twice.with(:no_args).and_return([8,
12])
@mock.multi_call.should_equal 8
@mock.multi_call.should_equal 12
@mock.__verify
end
Any feedback on how to properly test this is much appreciated.
Thanks,
Doug
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