This test has a few independent calls to asyncExpectThrows which uses
asyncStart/asyncEnd. However, multiple top-level asyncStart/asyncEnd
are not allowed, which causes the following flaky error:
```
Unhandled exception:
Exception: Fatal: asyncStart() was called even though we are done with testing.. This is most likely a bug in your test.
#0 asyncStart (package:expect/async_helper.dart:53)
#1 asyncExpectThrows (package:expect/async_helper.dart:140)
#2 testMalformedAuthenticateHeaderWithAuthHandler.<anonymous closure> (file:///b/s/w/ir/cache/builder/sdk/tests/standalone/io/http_auth_digest_test.dart:345)
#3 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:951)
#4 Future._propagateToListeners (dart:async/future_impl.dart:980)
#5 Future._completeWithValue (dart:async/future_impl.dart:723)
#6 Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:807)
#7 _microtaskLoop (dart:async/schedule_microtask.dart:40)
#8 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49)
#9 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:128)
#10 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:195)
--- Re-run this test:
python3 tools/test.py -n vm-aot-ubsan-linux-release-x64 standalone/io/http_auth_digest_test
```
This change attempts to fix this by adding a top-level asyncStart/asyncEnd
and also asyncStart/asyncEnd to the server start/shutdown to
enclose each test case into asyncStart/asyncEnd and avoid printing
"unittest-suite-success" marker before all test cases are finished.
TEST=standalone/io/http_auth_digest_test
Change-Id: I950e7c6c09f5c2144da874ab3be3cd3a130d3790
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/411086
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
Alexander Markov
b2c8b31af3