manual_clock 1.3.4

A package for testing current time related code.

example/example.dart

import 'dart:async';
import 'package:test/test.dart';
import 'package:clock/clock.dart';
import 'package:manual_clock/manual_clock.dart';

class ClassDependOnNow {
  final _startTime = clock.now();

  Duration get elapsed => clock.now().difference(_startTime);

  Future<int> someComplicatedTask() async {
    return Future.value(123);
  }
}

void main() {
  test('a test case', () async {
    await withManualClock((clock) async {
      final stopwatch = ClassDependOnNow();
      expect(stopwatch.elapsed, Duration.zero);

      final duration = Duration(minutes: 3);
      clock.elapse(duration);
      expect(stopwatch.elapsed, duration);

      final result = await stopwatch.someComplicatedTask();
      expect(result, 123);

      var fired = false;
      Timer(duration, () {
        fired = true;
      });
      clock.elapse(duration);
      expect(fired, true);
    });
  });
}