tomaszpolanski

/// Please first check out how ArrangeBuilder should be used in a simpler example:
/// https://gist.github.com/tomaszpolanski/abd4725d4e07ba637d5540b5fe10aa1e
abstract class ExampleUsecase {
  Future<String> fetchMessage();
}

tomaszpolanski

import 'example.dart';
import 'package:mocktail/mocktail.dart';

/// An example of a mixing that needs to be implemented once and can be used
/// in multiple tests without doing `when(() => ...)` in every test file
mixin ApiMixin {
  Api api = _MockApi();

  /// Function that prepares the mixin to be in a usable state.
  /// This would be mixin's constructor if mixins would support constructor

tomaszpolanski

final String? text;

@override
Widget build(BuildContext context) {
  final _text = text; // Assign field to local final variable
  return Column(
    children: [
      if (_text != null) Text(_text), // The `!` is not longer needed
    ],
  );

tomaszpolanski

void main() {
  final A example = B();
  if (example.text != null) {
    print(example.text!.length); // Throws null reference exception
  }
}

tomaszpolanski

class A {
  A(this.text);

  final String? text; // Final field
}

class B implements A {
  bool _first = true;

  @override

tomaszpolanski

final String? text;

@override
Widget build(BuildContext context) {
  return Column(
    children: [
      if (text != null) Text(text!), // Won't compile without `!` in `text!` 
    ],
  );
}

tomaszpolanski

class A {
  A(this.text);

  final String? text; // Final field
}

class B implements A {
  bool _first = true;

  @override

tomaszpolanski

### Keybase proof

I hereby claim:

  * I am tomaszpolanski on github.
  * I am tomekpolanski (https://keybase.io/tomekpolanski) on keybase.
  * I have a public key ASCKUlioKVilX-ZWBBM_SSeGjxkVO-nssaEU9BDiqg8bSQo

To claim this, I am signing this object:

tomaszpolanski

import 'package:integration_test/integration_test.dart';

import 'route_test.dart' as route;
import 'simple_test.dart' as simple;
import 'subfolder/sub_test.dart' as subfolder_sub;
import 'testing_test.dart' as testing;

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  route.main();

tomaszpolanski

final finder = find.text('Done');
for (int i = 0; i < 10; i++) {
 await tester.pump(const Duration(seconds: 1));
 if (findsOneWidget.matches(finder, {})) {
   break;
 }
}