The former waits for the test to complete while the latter does
not. Testing this on d8 uncovered two issues which are also
addressed in this CL:
1. async_test has a Promise that is rejected before it is handled.
2. Tests that use Promises don't work correctly on dart2js + d8,
and are therefore skipped for now until the issue is resolved.
Change-Id: I1fac1f4c653bb9ee30ed683d1b0d11bfbf14a58c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/343682
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Srujan Gaddam
4110b48950