expect(subscription).to receive(:canceled_at)
is an equivalent to
expect(subscription).to receive(:canceled_at).and_return(nil)
and no wonder
expect(subscription.canceled_at).to eq value
fails
You are probably looking to
expect(subscription).to receive(:canceled_at).and_call_original
On Fri, Feb 26, 2021 at 12:38 AM Jack Royal-Gordon <[email protected]> wrote:
>
> 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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