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// META: title=Scheduler: TaskController.setPriority() repeated calls
// META: global=window,worker
'use strict';
promise_test(async t => {
const controller = new TaskController();
const signal = controller.signal;
const tasks = [];
const runOrder = [];
const callback = id => { runOrder.push(id); };
tasks.push(scheduler.postTask(() => callback(0), {signal}));
tasks.push(scheduler.postTask(() => callback(1), {priority: 'user-blocking'}));
tasks.push(scheduler.postTask(() => callback(2), {priority: 'user-visible' }));
controller.setPriority('background');
assert_equals(signal.priority, 'background');
await Promise.all(tasks);
assert_equals(runOrder.toString(), '1,2,0');
while (tasks.length) { tasks.pop(); }
while (runOrder.length) { runOrder.pop(); }
tasks.push(scheduler.postTask(() => callback(3), {signal}));
tasks.push(scheduler.postTask(() => callback(4), {priority: 'user-blocking'}));
tasks.push(scheduler.postTask(() => callback(5), {priority: 'user-visible' }));
controller.setPriority('user-blocking');
assert_equals(signal.priority, 'user-blocking');
await Promise.all(tasks);
assert_equals(runOrder.toString(), '3,4,5');
}, 'TaskController.setPriority() changes the priority of all associated tasks when called repeatedly');
promise_test(async t => {
const controller = new TaskController();
const signal = controller.signal;
const tasks = [];
const runOrder = [];
const callback = id => { runOrder.push(id); };
tasks.push(scheduler.postTask(() => callback(0), {signal}));
tasks.push(scheduler.postTask(() => callback(1), {priority: 'user-blocking'}));
tasks.push(scheduler.postTask(() => callback(2), {priority: 'user-visible' }));
controller.setPriority('background');
assert_equals(signal.priority, 'background');
controller.setPriority('user-visible');
assert_equals(signal.priority, 'user-visible');
controller.setPriority('user-blocking');
assert_equals(signal.priority, 'user-blocking');
await Promise.all(tasks);
assert_equals(runOrder.toString(), '0,1,2');
}, 'TaskController.setPriority() changes the priority of all associated tasks when called repeatedly before tasks run');
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