First pass at unhandled errback reporting

[altendky]

#4

Draft for:

• Name[s]
• Fixture? Decorator? Both?
• Tests against
  • @inlineCallbacks
  • @ensureDeferred

[altendky]

@meejah, I'm not sure about this.

The fixture approach can't fail the test without manually adding an assert inside the function which additionally requires that you del or otherwise stop referencing any of the deferreds that might be trouble. So, the upside of the fixture being that you can auto-use it only works if you are willing to have your tests pass with errors.

The decorator lets the code leave the test scope thus no need to del and gets you actual test failures. But, you must manually apply it to every single test manually.

Maybe tomorrow I'll think up some way to auto-apply the decorator. Also, I need to add tests against inlineCallbacks etc.

[altendky]

I suppose the 'automatic decorator' option is having inlineCallbacks/ensureDeferred apply/implement this. It's not automatic to everything but if you are manually handling deferreds... then I guess you get some extra manual stuff to do if you want this. Making this optional would require allowing inlineCallbacks/ensureDeferred to take parameters. I guess I'll need to try to understand decorator again... or maybe that isn't actually necessary. :]