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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This test is disabled because it triggers https://github.com/dart-lang/sdk/issues/25246
import 'package:flutter/scheduler.dart';
import 'package:flutter/services.dart';
import 'package:test/test.dart';
class TestSchedulerBinding extends BindingBase with Scheduler { }
class TestStrategy implements SchedulingStrategy {
int allowedPriority = 10000;
bool shouldRunTaskWithPriority({ int priority, Scheduler scheduler }) {
return priority >= allowedPriority;
}
}
void main() {
test("Tasks are executed in the right order", () {
Scheduler scheduler = new TestSchedulerBinding();
TestStrategy strategy = new TestStrategy();
scheduler.schedulingStrategy = strategy;
List<int> input = <int>[2, 23, 23, 11, 0, 80, 3];
List<int> executedTasks = <int>[];
void scheduleAddingTask(int x) {
scheduler.scheduleTask(() { executedTasks.add(x); }, Priority.idle + x);
}
for (int x in input)
scheduleAddingTask(x);
strategy.allowedPriority = 100;
for (int i = 0; i < 3; i += 1)
scheduler.handleEventLoopCallback();
expect(executedTasks.isEmpty, isTrue);
strategy.allowedPriority = 50;
for (int i = 0; i < 3; i += 1)
scheduler.handleEventLoopCallback();
expect(executedTasks.length, equals(1));
expect(executedTasks.single, equals(80));
executedTasks.clear();
strategy.allowedPriority = 20;
for (int i = 0; i < 3; i += 1)
scheduler.handleEventLoopCallback();
expect(executedTasks.length, equals(2));
expect(executedTasks[0], equals(23));
expect(executedTasks[1], equals(23));
executedTasks.clear();
scheduleAddingTask(99);
scheduleAddingTask(19);
scheduleAddingTask(5);
scheduleAddingTask(97);
for (int i = 0; i < 3; i += 1)
scheduler.handleEventLoopCallback();
expect(executedTasks.length, equals(2));
expect(executedTasks[0], equals(99));
expect(executedTasks[1], equals(97));
executedTasks.clear();
strategy.allowedPriority = 10;
for (int i = 0; i < 3; i += 1)
scheduler.handleEventLoopCallback();
expect(executedTasks.length, equals(2));
expect(executedTasks[0], equals(19));
expect(executedTasks[1], equals(11));
executedTasks.clear();
strategy.allowedPriority = 1;
for (int i = 0; i < 4; i += 1)
scheduler.handleEventLoopCallback();
expect(executedTasks.length, equals(3));
expect(executedTasks[0], equals(5));
expect(executedTasks[1], equals(3));
expect(executedTasks[2], equals(2));
executedTasks.clear();
strategy.allowedPriority = 0;
scheduler.handleEventLoopCallback();
expect(executedTasks.length, equals(1));
expect(executedTasks[0], equals(0));
});
}