🎒backport advanced scope helpers from v4 -> v3 #980
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In v4, the `Scope` interface got a little more powerful 💪💪 Specifically, it got an `expect()` helper to throw an error if a context is missing. It's the scope equivalent of `Context.expect()`. Also, there is a `hasOwn()` helper which is necessary for some cases where there needs to be a single context value per task. Finally, there is `delete()` which is very rarely used, but rounds out the API, and since it's present in v4, it's probably a good idea to add it.
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Motivation
In v4, the
Scopeinterface got a little more powerful 💪💪Specifically, it got an
expect()helper to throw an error if a context is missing. It's the scope equivalent ofContext.expect(). Also, there is ahasOwn()helper which is necessary for some cases where there needs to be a single context value per task.Finally, there is
delete()which is very rarely used, but rounds out the API, and since it's present in v4, it's probably a good idea to add it.Approach
Bring the methods on over, along with some tests.