// Copyright (c) 2019, 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.

// @dart = 2.9

import 'dart:async';
import 'dart:convert';
import 'dart:io';

import 'package:path/path.dart' as path;
import 'package:expect/expect.dart';
import 'package:native_stack_traces/native_stack_traces.dart';

// Test functions:

Future<void> throwSync() {
  throw 'throw from throwSync';
}

Future<void> throwAsync() async {
  await 0;
  throw 'throw from throwAsync';
}

// ----
// Scenario: All async functions yielded at least once before throw:
// ----
Future<void> allYield() async {
  await 0;
  await allYield2();
}

Future<void> allYield2() async {
  await 0;
  await allYield3();
}

Future<void> allYield3() async {
  await 0;
  throwSync();
}

// ----
// Scenario: None of the async functions yielded before the throw:
// ----
Future<void> noYields() async {
  await noYields2();
}

Future<void> noYields2() async {
  await noYields3();
}

Future<void> noYields3() async {
  throwSync();
}

// ----
// Scenario: Mixed yielding and non-yielding frames:
// ----
Future<void> mixedYields() async {
  await mixedYields2();
}

Future<void> mixedYields2() async {
  await 0;
  await mixedYields3();
}

Future<void> mixedYields3() async {
  return throwAsync();
}

// ----
// Scenario: Non-async frame:
// ----
Future<void> syncSuffix() async {
  await syncSuffix2();
}

Future<void> syncSuffix2() async {
  await 0;
  await syncSuffix3();
}

Future<void> syncSuffix3() {
  return throwAsync();
}

// ----
// Scenario: Caller is non-async, has no upwards stack:
// ----

Future nonAsyncNoStack() async => await nonAsyncNoStack1();

Future nonAsyncNoStack1() async => await nonAsyncNoStack2();

Future nonAsyncNoStack2() async => Future.value(0).then((_) => throwAsync());

// ----
// Scenario: async*:
// ----

Future awaitEveryAsyncStarThrowSync() async {
  await for (Future v in asyncStarThrowSync()) {
    await v;
  }
}

Stream<Future> asyncStarThrowSync() async* {
  for (int i = 0; i < 2; i++) {
    await i;
    yield throwSync();
  }
}

Future awaitEveryAsyncStarThrowAsync() async {
  await for (Future v in asyncStarThrowAsync()) {
    await v;
  }
}

Stream<Future> asyncStarThrowAsync() async* {
  for (int i = 0; i < 2; i++) {
    await i;
    yield Future.value(i);
    await throwAsync();
  }
}

Future listenAsyncStarThrowAsync() async {
  // Listening to an async* doesn't create the usual await-for StreamIterator.
  StreamSubscription ss = asyncStarThrowAsync().listen((Future f) => 42);
  await ss.asFuture();
}

// ----
// Scenario: All async functions yielded and we run in a custom zone with a
// custom error handler.
// ----

Future<void> customErrorZone() async {
  final completer = Completer<void>();
  runZonedGuarded(() async {
    await allYield();
    completer.complete(null);
  }, (e, s) {
    completer.completeError(e, s);
  });
  return completer.future;
}

// ----
// Scenario: Future.timeout:
// ----

Future awaitTimeout() async {
  await (throwAsync().timeout(Duration(seconds: 1)));
}

// ----
// Scenario: Future.wait:
// ----

Future awaitWait() async {
  await Future.wait([
    throwAsync(),
    () async {
      await Future.value();
    }()
  ]);
}

// ----
// Scenario: Future.whenComplete:
// ----

Future futureSyncWhenComplete() {
  return Future.sync(throwAsync).whenComplete(() => 'nop');
}

// ----
// Scenario: Future.then:
// ----

Future futureThen() {
  return Future.value(0).then((value) {
    throwSync();
  });
}

// Helpers:

// Marker to tell the matcher to ignore the rest of the stack.
const IGNORE_REMAINING_STACK = '#@ IGNORE_REMAINING_STACK #@';

// We want lines that either start with a frame index or an async gap marker.
final _lineRE = RegExp(r'^(?:#(?<number>\d+)|<asynchronous suspension>)');

Future<void> assertStack(List<String> expects, StackTrace stackTrace,
    [String debugInfoFilename]) async {
  final original = await Stream.value(stackTrace.toString())
      .transform(const LineSplitter())
      .toList();
  var frames = original;

  // Use the DWARF stack decoder if we're running in --dwarf-stack-traces mode
  // and in precompiled mode (otherwise --dwarf-stack-traces has no effect).
  final decodeTrace = frames.first.startsWith('Warning:');
  if (decodeTrace) {
    Expect.isNotNull(debugInfoFilename);
    final dwarf = Dwarf.fromFile(debugInfoFilename);
    frames = await Stream.fromIterable(original)
        .transform(DwarfStackTraceDecoder(dwarf))
        .where(_lineRE.hasMatch)
        .toList();
  }

  void printFrameInformation() {
    print('RegExps for expected stack:');
    expects.forEach((s) => print('"${s}"'));
    print('');
    if (decodeTrace) {
      print('Non-symbolic actual stack:');
      original.forEach(print);
      print('');
    }
    print('Actual stack:');
    frames.forEach(print);
    print('');
  }

  for (int i = 0; i < expects.length; i++) {
    try {
      Expect.isTrue(i < frames.length,
          'Expected at least ${expects.length} frames, found ${frames.length}');
    } on ExpectException {
      // On failed expect, print full stack for reference.
      printFrameInformation();
      print('Expected line ${i + 1} to be ${expects[i]} but was missing');
      rethrow;
    }
    // If we encounter this special marker we ignore the rest of the stack.
    if (expects[i] == IGNORE_REMAINING_STACK) {
      return;
    }
    try {
      Expect.isTrue(RegExp(expects[i]).hasMatch(frames[i]));
    } on ExpectException {
      // On failed expect, print full stack for reference.
      printFrameInformation();
      print('Expected line ${i + 1} to be `${expects[i]}` '
          'but was `${frames[i]}`');
      rethrow;
    }
  }

  try {
    Expect.equals(expects.length, frames.length);
  } on ExpectException {
    // On failed expect, print full stack for reference.
    printFrameInformation();
    rethrow;
  }
}

Future<void> doTestAwait(Future f(), List<String> expectedStack,
    [String debugInfoFilename]) async {
  // Caller catches exception.
  try {
    await f();
    Expect.fail('No exception thrown!');
  } on String catch (e, s) {
    return assertStack(expectedStack, s, debugInfoFilename);
  }
}

Future<void> doTestAwaitThen(Future f(), List<String> expectedStack,
    [String debugInfoFilename]) async {
  // Caller catches but a then is set.
  try {
    // Passing (e) {} to then() can cause the closure instructions to be
    // dedupped, changing the stack trace to the dedupped owner, so we
    // duplicate the Expect.fail() call in the closure.
    await f().then((e) => Expect.fail('No exception thrown!'));
    Expect.fail('No exception thrown!');
  } on String catch (e, s) {
    return assertStack(expectedStack, s, debugInfoFilename);
  }
}

Future<void> doTestAwaitCatchError(Future f(), List<String> expectedStack,
    [String debugInfoFilename]) async {
  // Caller doesn't catch, but we have a catchError set.
  StackTrace stackTrace;
  await f().catchError((e, s) {
    stackTrace = s;
  });
  return assertStack(expectedStack, stackTrace, debugInfoFilename);
}

// ----
// Test "Suites":
// ----

Future<void> doTestsLazy([String debugInfoFilename]) async {
  // allYield
  {
    final allYieldExpected = const <String>[
      r'^#0      throwSync \(.*/utils.dart:18(:3)?\)$',
      r'^#1      allYield3 \(.*/utils.dart:41(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      allYield2 \(.*/utils.dart:36(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#3      allYield \(.*/utils.dart:31(:3)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        allYield,
        allYieldExpected +
            const <String>[
              r'^#4      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#5      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#6      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        allYield,
        allYieldExpected +
            const <String>[
              r'^#4      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#5      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#6      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        allYield,
        allYieldExpected +
            const <String>[
              r'^#4      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#5      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#6      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // noYields
  {
    final noYieldsExpected = const <String>[
      r'^#0      throwSync \(.*/utils.dart:18(:3)?\)$',
      r'^#1      noYields3 \(.*/utils.dart:56(:3)?\)$',
      r'^#2      noYields2 \(.*/utils.dart:52(:9)?\)$',
      r'^#3      noYields \(.*/utils.dart:48(:9)?\)$',
    ];
    await doTestAwait(
        noYields,
        noYieldsExpected +
            const <String>[
              r'^#4      doTestAwait ',
              r'^#5      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#6      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        noYields,
        noYieldsExpected +
            const <String>[
              r'^#4      doTestAwaitThen ',
              r'^#5      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#6      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        noYields,
        noYieldsExpected +
            const <String>[
              r'^#4      doTestAwaitCatchError ',
              r'^#5      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#6      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // mixedYields
  {
    final mixedYieldsExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      mixedYields2 \(.*/utils.dart:68(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      mixedYields \(.*/utils.dart:63(:3)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        mixedYields,
        mixedYieldsExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        mixedYields,
        mixedYieldsExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        mixedYields,
        mixedYieldsExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // syncSuffix
  {
    final syncSuffixExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      syncSuffix2 \(.*/utils.dart:84(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      syncSuffix \(.*/utils.dart:79(:3)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        syncSuffix,
        syncSuffixExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        syncSuffix,
        syncSuffixExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        syncSuffix,
        syncSuffixExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // nonAsyncNoStack
  {
    final nonAsyncNoStackExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      nonAsyncNoStack1 \(.*/utils.dart:97(:36)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      nonAsyncNoStack \(.*/utils.dart:95(:35)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        nonAsyncNoStack,
        nonAsyncNoStackExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        nonAsyncNoStack,
        nonAsyncNoStackExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        nonAsyncNoStack,
        nonAsyncNoStackExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // awaitEveryAsyncStarThrowSync
  {
    final asyncStarThrowSyncExpected = const <String>[
      r'^#0      throwSync \(.+/utils.dart:18(:3)?\)$',
      r'^#1      asyncStarThrowSync \(.+/utils.dart:114(:11)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      awaitEveryAsyncStarThrowSync \(.+/utils.dart:106(:3)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        awaitEveryAsyncStarThrowSync,
        asyncStarThrowSyncExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        awaitEveryAsyncStarThrowSync,
        asyncStarThrowSyncExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        awaitEveryAsyncStarThrowSync,
        asyncStarThrowSyncExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // awaitEveryAsyncStarThrowAsync
  {
    final asyncStarThrowAsyncExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      asyncStarThrowAsync \(.*/utils.dart:128(:5)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      awaitEveryAsyncStarThrowAsync \(.+/utils.dart:119(:3)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        awaitEveryAsyncStarThrowAsync,
        asyncStarThrowAsyncExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        awaitEveryAsyncStarThrowAsync,
        asyncStarThrowAsyncExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        awaitEveryAsyncStarThrowAsync,
        asyncStarThrowAsyncExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // listenAsyncStarThrowAsync
  {
    final listenAsyncStartExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      asyncStarThrowAsync \(.*/utils.dart:128(:5)?\)$',
      r'^<asynchronous suspension>$',
      r'^#2      listenAsyncStarThrowAsync.<anonymous closure> \(.+/utils.dart:134(:56)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        listenAsyncStarThrowAsync, listenAsyncStartExpected, debugInfoFilename);
    await doTestAwaitThen(
        listenAsyncStarThrowAsync, listenAsyncStartExpected, debugInfoFilename);
    await doTestAwaitCatchError(
        listenAsyncStarThrowAsync, listenAsyncStartExpected, debugInfoFilename);
  }

  // customErrorZone
  {
    final customErrorZoneExpected = const <String>[
      r'#0      throwSync \(.*/utils.dart:18(:3)?\)$',
      r'#1      allYield3 \(.*/utils.dart:41(:3)?\)$',
      r'<asynchronous suspension>$',
      r'#2      allYield2 \(.*/utils.dart:36(:3)?\)$',
      r'<asynchronous suspension>$',
      r'#3      allYield \(.*/utils.dart:31(:3)?\)$',
      r'<asynchronous suspension>$',
      r'#4      customErrorZone.<anonymous closure> \(.*/utils.dart:146(:5)?\)$',
      r'<asynchronous suspension>$',
    ];
    await doTestAwait(
        customErrorZone, customErrorZoneExpected, debugInfoFilename);
    await doTestAwaitThen(
        customErrorZone, customErrorZoneExpected, debugInfoFilename);
    await doTestAwaitCatchError(
        customErrorZone, customErrorZoneExpected, debugInfoFilename);
  }

  // awaitTimeout
  {
    final awaitTimeoutExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      Future.timeout.<anonymous closure> \(dart:async/future_impl.dart',
      r'^<asynchronous suspension>$',
      r'^#2      awaitTimeout ',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        awaitTimeout,
        awaitTimeoutExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        awaitTimeout,
        awaitTimeoutExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        awaitTimeout,
        awaitTimeoutExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // awaitWait
  {
    final awaitWaitExpected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
      r'^#1      Future.wait.<anonymous closure> \(dart:async/future.dart',
      r'^<asynchronous suspension>$',
      r'^#2      awaitWait ',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        awaitWait,
        awaitWaitExpected +
            const <String>[
              r'^#3      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        awaitWait,
        awaitWaitExpected +
            const <String>[
              r'^#3      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        awaitWait,
        awaitWaitExpected +
            const <String>[
              r'^#3      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#4      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#5      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // futureSyncWhenComplete
  {
    final expected = const <String>[
      r'^#0      throwAsync \(.*/utils.dart:23(:3)?\)$',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        futureSyncWhenComplete,
        expected +
            const <String>[
              r'^#1      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#2      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#3      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        futureSyncWhenComplete,
        expected +
            const <String>[
              r'^#1      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#2      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#3      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        futureSyncWhenComplete,
        expected +
            const <String>[
              r'^#1      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#2      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#3      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }

  // futureThen
  {
    final expected = const <String>[
      r'^#0      throwSync \(.*/utils.dart:18(:3)?\)$',
      r'^#1      futureThen.<anonymous closure> ',
      r'^<asynchronous suspension>$',
    ];
    await doTestAwait(
        futureThen,
        expected +
            const <String>[
              r'^#2      doTestAwait ',
              r'^<asynchronous suspension>$',
              r'^#3      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#4      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitThen(
        futureThen,
        expected +
            const <String>[
              r'^#2      doTestAwaitThen ',
              r'^<asynchronous suspension>$',
              r'^#3      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#4      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
    await doTestAwaitCatchError(
        futureThen,
        expected +
            const <String>[
              r'^#2      doTestAwaitCatchError ',
              r'^<asynchronous suspension>$',
              r'^#3      doTestsLazy ',
              r'^<asynchronous suspension>$',
              r'^#4      main ',
              r'^<asynchronous suspension>$',
            ],
        debugInfoFilename);
  }
}