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Test Info: Warnings
- This test has a WPT meta file that expects 3 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /scheduler/tentative/yield/yield-priority-posttask.any.html - WPT Dashboard Interop Dashboard
- /scheduler/tentative/yield/yield-priority-posttask.any.worker.html - WPT Dashboard Interop Dashboard
'use strict';
// Posts a postTask task with `yieldyTaskParams` that yields 3 times using
// `yieldParams`, then posts 2 tasks of each priority, in descending order.
//
// Returns {tasks, ids} where `tasks` is an array of promises returned by
// postTask and `ids` is an array of task ids appended to by the scheduled
// tasks.
function postTestTasks(yieldyTaskParams) {
const tasks = [];
const ids = [];
tasks.push(scheduler.postTask(async () => {
ids.push('y0');
for (let i = 1; i < 4; i++) {
await scheduler.yield();
ids.push('y' + i);
}
}, yieldyTaskParams));
tasks.push(
scheduler.postTask(() => {ids.push('ub1')}, {priority: 'user-blocking'}));
tasks.push(
scheduler.postTask(() => {ids.push('ub2')}, {priority: 'user-blocking'}));
tasks.push(
scheduler.postTask(() => {ids.push('uv1')}, {priority: 'user-visible'}));
tasks.push(
scheduler.postTask(() => {ids.push('uv2')}, {priority: 'user-visible'}));
tasks.push(
scheduler.postTask(() => {ids.push('bg1')}, {priority: 'background'}));
tasks.push(
scheduler.postTask(() => {ids.push('bg2')}, {priority: 'background'}));
return {tasks, ids};
}
// Expected task orders for `postTestTasks` tasks.
const taskOrders = {
'user-blocking': 'y0,y1,y2,y3,ub1,ub2,uv1,uv2,bg1,bg2',
'user-visible': 'ub1,ub2,y0,y1,y2,y3,uv1,uv2,bg1,bg2',
'background': 'ub1,ub2,uv1,uv2,y0,y1,y2,y3,bg1,bg2',
};
const priorityConfigs = [
{options: {}, expected: taskOrders['user-visible']},
{options: {priority: 'user-visible'}, expected: taskOrders['user-visible']},
{options: {priority: 'user-blocking'}, expected: taskOrders['user-blocking']},
{options: {priority: 'background'}, expected: taskOrders['background']},
];
const fixedPrioritySignals = {
'user-blocking': (new TaskController({priority: 'user-blocking'})).signal,
'user-visible': (new TaskController({priority: 'user-visible'})).signal,
'background': (new TaskController({priority: 'background'})).signal,
};
const signalConfigs = [
{
options: {signal: fixedPrioritySignals['user-visible']},
expected: taskOrders['user-visible']
},
{
options: {signal: fixedPrioritySignals['user-blocking']},
expected: taskOrders['user-blocking']
},
{
options: {signal: fixedPrioritySignals['background']},
expected: taskOrders['background']
},
];
promise_test(async t => {
for (const config of priorityConfigs) {
const {tasks, ids} = postTestTasks(config.options);
await Promise.all(tasks);
assert_equals(ids.join(), config.expected);
}
}, 'yield() with postTask tasks (priority)');
promise_test(async t => {
for (const config of signalConfigs) {
const {tasks, ids} = postTestTasks(config.options);
await Promise.all(tasks);
assert_equals(ids.join(), config.expected);
}
}, 'yield() with postTask tasks (signal)');
promise_test(async t => {
const ids = [];
const controller = new TaskController();
const signal = controller.signal;
await scheduler.postTask(async () => {
ids.push('y0');
const subtasks = [];
subtasks.push(scheduler.postTask(() => { ids.push('uv1'); }));
subtasks.push(scheduler.postTask(() => { ids.push('uv2'); }));
// 'user-visible' continuations.
await scheduler.yield();
ids.push('y1');
await scheduler.yield();
ids.push('y2');
controller.setPriority('background');
// 'background' continuations.
await scheduler.yield();
ids.push('y3');
await scheduler.yield();
ids.push('y4');
await Promise.all(subtasks);
}, {signal});
assert_equals(ids.join(), 'y0,y1,y2,uv1,uv2,y3,y4');
}, 'yield() with TaskSignal has dynamic priority')