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'use strict';
function postInheritPriorityTestTask(config) {
const ids = [];
const task = scheduler.postTask(async () => {
await new Promise(resolve => setTimeout(resolve));
await fetch('/common/blank.html');
await new Promise(resolve => setTimeout(resolve));
const subtask = scheduler.postTask(() => { ids.push('subtask'); }, {priority: config.subTaskPriority});
await scheduler.yield(config.yieldOptions);
ids.push('yield');
await subtask;
}, config.taskOptions);
return {task, ids}
}
for (let priority of ['user-blocking', 'background']) {
const expected = priority == 'user-blocking' ? 'yield,subtask' : 'subtask,yield';
promise_test(async t => {
const config = {
taskOptions: {priority},
subTaskPriority: 'user-blocking',
yieldOptions: {priority: 'inherit'},
};
const {task, ids} = postInheritPriorityTestTask(config);
await task;
assert_equals(ids.join(), expected);
}, `yield() inherits priority (string) across promises (${priority})`);
promise_test(async t => {
const signal = (new TaskController({priority})).signal;
const config = {
taskOptions: {signal},
subTaskPriority: 'user-blocking',
yieldOptions: {signal: 'inherit'},
};
const {task, ids} = postInheritPriorityTestTask(config);
await task;
assert_equals(ids.join(), expected);
}, `yield() inherits priority (signal) across promises (${priority})`);
promise_test(async t => {
const config = {
taskOptions: {priority},
subTaskPriority: 'user-blocking',
yieldOptions: {signal: 'inherit'},
};
const {task, ids} = postInheritPriorityTestTask(config);
await task;
assert_equals(ids.join(), expected);
}, `yield() inherits priority (priority string with signal inherit) across promises (${priority})`);
}
promise_test(async t => {
const controller = new TaskController();
const signal = controller.signal;
return scheduler.postTask(async () => {
await new Promise(resolve => setTimeout(resolve));
await fetch('/common/blank.html');
await new Promise(resolve => setTimeout(resolve));
controller.abort();
const p = scheduler.yield({signal: 'inherit'});
await promise_rejects_dom(t, 'AbortError', p);
}, {signal});
}, `yield() inherits abort across promises`);
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