Hypothesis: Stateful: add multiple items to a bundle

[Tinche]

I'd like to have steps in my stateful tests that depend on previous steps; IIUC bundles are a way to achieve that.

The problem is, puttings items into a bundle works via target=bundle in @rule, and I'd like to potentially generate several values per rule execution.

Edit to clarify: I'd like to have subsequent steps in my tests use values generated by prior steps, I'm aware of @precondition.

[Tinche]

Come to think of it, having a way of prepopulating bundles (from __init__) would be great too.

[DRMacIver]

It's a good idea, and I'm up for implementing it at some point. I think the API and how printing is handled require a bit of a rework to make it possible, but it's reasonably feasible from an internals point of view.

There are a bunch of higher priority things right now which mean improvements to stateful testing aren't really on the short term road map, so it probably won't happen soon though.

[Zac-HD]

Come to think of it, having a way of prepopulating bundles (from __init__) would be great too.

This is now covered by @initialize rules, which are run exactly once each prior to any other rule.

[jomuel]

Do we already have a plan what the API for this should look like? My proposal would be

• a function to wrap the results when returning, like: return multiple(result1, result2, result3)
• since multiple() could be used to add no result to the bundle, it should have a convenient alias like return no_result().