I'm sure there's mistakes since I can't parse the tests, much less run
them, but I did my best.
Is there anything else you think we should add? I feel like the tests
around inference are weak, but I don't know what else would help.
Change-Id: If4b573acad4395310ad6fc3477861f8d28c16255
Reviewed-on: https://dart-review.googlesource.com/c/89085
Reviewed-by: Leaf Petersen <leafp@google.com>
Bob Nystrom