runtime/observatory/tests/service/pause_on_unhandled_async_exceptions_test.dart

// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// VMOptions=--error_on_bad_type --error_on_bad_override

import 'package:observatory/service_io.dart';
import 'package:observatory/models.dart' as M;
import 'package:unittest/unittest.dart';
import 'test_helper.dart';
import 'service_test_common.dart';

const LINE_A = 37;

class Foo {

}

doThrow() {
  throw "TheException"; // Line 13.
  return "end of doThrow";
}

asyncThrower() async {
  doThrow();
}

testeeMain() async {
  try {
    // caught.
    try {
      await asyncThrower();
    } catch (e) {
    }

    // uncaught.
    try {
      await asyncThrower();  // LINE_A.
    } on double catch (e) {
    }
  } on Foo catch (e) {
  }
}

var tests = [
  hasStoppedWithUnhandledException,

  (Isolate isolate) async {
    print("We stoppped!");
    var stack = await isolate.getStack();
    expect(stack['asyncCausalFrames'], isNotNull);
    var asyncStack = stack['asyncCausalFrames'];
    expect(asyncStack[0].toString(), contains('doThrow'));
    expect(asyncStack[1].toString(), contains('asyncThrower'));
    expect(asyncStack[2].kind, equals(M.FrameKind.asyncSuspensionMarker));
    expect(asyncStack[3].toString(), contains('testeeMain'));
    // We've stopped at LINE_A.
    expect(await asyncStack[3].location.toUserString(),
           contains('.dart:$LINE_A'));
  }
];

main(args) => runIsolateTests(args,
                              tests,
                              pause_on_unhandled_exceptions: true,
                              testeeConcurrent: testeeMain);