Should lazy Given variables be evaluated before override?

[cades]

Currently, this test will pass:

Given x: -> throw new Error 'oops!'
When -> @x = 'override x'
Then -> "it is ok"

but in rspec-given, this will fail.

Javascript provide Object.defineProperties, which allow developers to define getter and setter separately. As a result, execute setter without executing getter is possible. The question here is: which behavior should it have? Does the semantic is consistent with general evaluation rule?

At this moment, I have no idea about this choice. Have to survey how other projects dealing with this issue.

Any suggestion is welcome!