71 lines
1.9 KiB
Dart
71 lines
1.9 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:plezy/mixins/disposable_change_notifier_mixin.dart';
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class _Probe extends ChangeNotifier with DisposableChangeNotifierMixin {}
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void main() {
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group('DisposableChangeNotifierMixin', () {
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test('isDisposed is false on a fresh notifier', () {
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final n = _Probe();
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expect(n.isDisposed, isFalse);
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n.dispose();
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});
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test('safeNotifyListeners returns true and notifies when not disposed', () {
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final n = _Probe();
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var fired = 0;
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n.addListener(() => fired++);
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final result = n.safeNotifyListeners();
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expect(result, isTrue);
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expect(fired, 1);
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n.dispose();
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});
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test('safeNotifyListeners returns false and does not notify after dispose', () {
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final n = _Probe();
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var fired = 0;
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n.addListener(() => fired++);
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n.dispose();
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final result = n.safeNotifyListeners();
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expect(result, isFalse);
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expect(fired, 0);
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});
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test('isDisposed flips to true after dispose()', () {
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final n = _Probe();
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expect(n.isDisposed, isFalse);
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n.dispose();
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expect(n.isDisposed, isTrue);
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});
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test('multiple safeNotifyListeners calls succeed before dispose', () {
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final n = _Probe();
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var fired = 0;
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n.addListener(() => fired++);
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expect(n.safeNotifyListeners(), isTrue);
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expect(n.safeNotifyListeners(), isTrue);
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expect(n.safeNotifyListeners(), isTrue);
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expect(fired, 3);
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n.dispose();
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});
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test('safeNotifyListeners after dispose does not throw', () {
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final n = _Probe();
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n.dispose();
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// Without the mixin's guard, ChangeNotifier.notifyListeners would throw
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// a debug-only assertion. The whole point of the mixin is to no-op.
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expect(n.safeNotifyListeners, returnsNormally);
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});
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});
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}
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