tomaszpolanski

abstract class TimeProvider {
 Future<void> delayed(Duration duration);
}

class TimeProviderImpl implements TimeProvider {
 @override
 Future<void> delayed(Duration duration) => Future<void>.delayed(duration);
}

class MockTimeProvider implements TimeProvider {

tomaszpolanski

testWidgets('time test', (tester) async {
    const done = Key('done');
    const pending = Key('pending');
    await tester.pumpWidget(
      FutureBuilder(
        future: Future<void>.delayed(const Duration(seconds: 10)),
        builder: (context, sn) {
          return sn.connectionState == ConnectionState.done
              ? const SizedBox(key: done)
              : const SizedBox(key: pending);

tomaszpolanski

import 'dart:math' as math;

import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';

class SliverFloatingHeader extends SingleChildRenderObjectWidget {
  const SliverFloatingHeader({
    Key key,
    Widget child,
  }) : super(key: key, child: child);

tomaszpolanski

void main() {
  final PublishSubject<Configuration> configStream = PublishSubject();
  enableFlutterDriverExtension(
    handler: (request) async {
      final Configuration config = Configuration.fromJson(json.decode(request));
      configStream.add(config);
      return null;
    },
  );
  runApp(

tomaszpolanski

- `flutter channel master && flutter doctor`
- `export ENABLE_FLUTTER_DESKTOP=true`
- `git clone [email protected]:google/flutter-desktop-embedding.git`
- Move your project inside the `flutter-desktop-embedding` folder
- Copy the `macos` folder from `flutter-desktop-embedding/example` to your project
- `cd flutter-desktop-embedding/my-project && flutter run -d macos`

tomaszpolanski

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

class AnimationPerformance extends StatefulWidget {
  @override
  _BadTranslate createState() => _BadTranslate();
}

class _BadTranslate extends State<AnimationPerformance>
    with SingleTickerProviderStateMixin {

tomaszpolanski

import 'package:flutter/material.dart';

void main() {
  // Displays build timeline
  debugProfileBuildsEnabled = true;
  runApp(GlobalKeyWidget());
}


class WidgetsWithKeysAreJustUpdated extends StatefulWidget {

tomaszpolanski

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  setUp(() {
    // Limits viewport in tests to size of 100, 100 to decrease the size of
    // the pngs
    WidgetsBinding.instance.renderView.configuration =
        TestViewConfiguration(size: const Size(100, 100));
  });

tomaszpolanski

# Check https://dart-lang.github.io/linter/lints/ for lint rules documentation
# Update from http://dart-lang.github.io/linter/lints/options/options.html

analyzer:
  errors:
    missing_required_param: error
    missing_return: error
    todo: ignore
  language:
    strict-inference: true

tomaszpolanski

class OnErrorResumeNextStreamTransformer2<T>
    extends StreamTransformerBase<T, T> {
  final StreamTransformer<T, T> transformer;

  // From the orginal version parameter was changed from `Stream<T> recoveryStream` to `Stream<T> Function (dynamic error) recoveryStream`
  OnErrorResumeNextStreamTransformer2(Stream<T> Function (dynamic error) recoveryStream)
      : transformer = _buildTransformer(recoveryStream);

  @override
  Stream<T> bind(Stream<T> stream) => transformer.bind(stream);