I’m seeing unusual behavior when i place an "expect().to receive” on an element
of a struct. Specifically, with the following code:
describe 'test example of struct' do
let!(:subscription) { Sub = Struct.new(:canceled_at) ; Sub.new(canceled_at:
2.weeks.from_now) }
it 'behaves okay with no expectation set' do
value = 2.weeks.ago
subscription.canceled_at = value
puts subscription.inspect
expect(subscription.canceled_at).to eq value
end
it 'misbehaves if I place an expecation on the element' do
expect(subscription).to receive(:canceled_at)
value = 2.weeks.ago
subscription.canceled_at = value
puts subscription.inspect
expect(subscription.canceled_at).to eq value
end
end
Here is the result of running those examples:
Run options: include
{:locations=>{"./spec/models/user/stripe_customer_spec.rb"=>[362]}}
#<struct Sub canceled_at=Thu, 11 Feb 2021 21:24:19 UTC +00:00>
./Users/jackrg/Documents/Novelty-Stats/spec/models/user/stripe_customer_spec.rb:363:
warning: already initialized constant Sub
/Users/jackrg/Documents/Novelty-Stats/spec/models/user/stripe_customer_spec.rb:363:
warning: previous definition of Sub was here
#<struct Sub canceled_at=Thu, 11 Feb 2021 21:24:19 UTC +00:00>
F
Failures:
1) User::StripeCustomer test example of struct misbehaves if I place an
expecation on the element
Failure/Error: expect(subscription.canceled_at).to eq value
expected: 2021-02-11 21:24:19.601491000 +0000
got: nil
(compared using ==)
# ./spec/models/user/stripe_customer_spec.rb:377:in `block (3 levels) in
<top (required)>'
Finished in 0.0432 seconds (files took 7.91 seconds to load)
2 examples, 1 failure
The only difference between the two examples is the addition of the highlights
line in the second example. That expectation causes the retrieval process to
not work, returning nil instead of the current value (or even the initial
value).
Is this a known issue? I can’t find it documented anywhere.
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