// 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.

import 'dart:async';
import 'package:vm_service/vm_service.dart';
import 'package:test/test.dart';

import 'common/test_helper.dart';

Future<void> sleep(int milliseconds) =>
    Future.delayed(Duration(milliseconds: milliseconds));

var tests = <IsolateTest>[
  (VmService service, IsolateRef isolate) async {
    AllocationProfile result = await service.getAllocationProfile(isolate.id);
    expect(result.dateLastAccumulatorReset, isNull);
    expect(result.dateLastServiceGC, isNull);
    expect(result.members.length, isPositive);

    ClassHeapStats member = result.members[0];
    expect(member.instancesAccumulated, isNotNull);
    expect(member.instancesCurrent, isNotNull);
    expect(member.bytesCurrent, isNotNull);
    expect(member.accumulatedSize, isNotNull);

    // reset.
    result = await service.getAllocationProfile(isolate.id, reset: true);
    final firstReset = result.dateLastAccumulatorReset;
    expect(firstReset, isNotNull);
    expect(result.dateLastServiceGC, isNull);
    expect(result.members.length, isPositive);

    member = result.members[0];
    expect(member.instancesAccumulated, isNotNull);
    expect(member.instancesCurrent, isNotNull);
    expect(member.bytesCurrent, isNotNull);
    expect(member.accumulatedSize, isNotNull);

    await sleep(1000);

    result = await service.getAllocationProfile(isolate.id, reset: true);
    final secondReset = result.dateLastAccumulatorReset;
    expect(secondReset, isNot(firstReset));

    // gc.
    result = await service.getAllocationProfile(isolate.id, gc: true);
    expect(result.dateLastAccumulatorReset, secondReset);
    final firstGC = result.dateLastServiceGC;
    expect(firstGC, isNotNull);
    expect(result.members.length, isPositive);

    member = result.members[0];
    expect(member.instancesAccumulated, isNotNull);
    expect(member.instancesCurrent, isNotNull);
    expect(member.bytesCurrent, isNotNull);
    expect(member.accumulatedSize, isNotNull);

    await sleep(1000);

    result = await service.getAllocationProfile(isolate.id, gc: true);
    final secondGC = result.dateLastAccumulatorReset;
    expect(secondGC, isNot(firstGC));
  },
];

main([args = const <String>[]]) async => runIsolateTests(args, tests);