I’m trying to use a mock to return a hash so that #each_pair can
process it. I can’t get it to work. Whatever I return to #each_pair is
ignored and the block never gets executed. Here’s an example
illustrating the problem.
def example(data)
data.each_pair do |key, value| @result = {key => value}
end
end
end
describe MyExample, “mock#each_pair fails” do
it “should return a hash after processing the mock using each_pair”
do
sample_mock = mock(“sample”)
real_hash = {:key => :value}
sample_mock.should_receive(:each_pair).once.and_return(real_hash)
obj = MyExample.new
obj.example(sample_mock)
obj.result.should == real_hash
end
end
I tried returning different things in case the hash was the wrong
intermediate. I tried: #and_return([:key, :value]) #and_return([[:key, :value]]) #and_return(:key, :value)
None worked. Is this a bug or am I misusing mocks?
class MyExample
it “should return a hash after processing the mock using each_pair”
each_pair does not return the hash, it yields it to a block. Try this:
thanks for the hint. That almost worked but I got this error:
Spec::Mocks::MockExpectationError in ‘MyExample mock#each_pair fails
should return a hash after processing the mock using each_pair’
Mock ‘sample’ yielded |{:key=>:value}| to block with arity of 2
Changing it slightly allowed it to work correctly:
describe MyExample, “mock#each_pair fails” do
it “should return a hash after processing the mock using each_pair”
do
sample_mock = mock(“sample”)
real_hash = {:key => :value}
sample_mock
.should_receive(:each_pair).once.and_yield(real_hash.keys.first,
real_hash.values.first)
obj = MyExample.new
obj.example(sample_mock)
obj.result.should == real_hash
end
end
Thanks for your help. SrBaker has been enriched as a result.