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// META: global=window,worker
test((t) => {
const signal = TaskSignal.any([]);
assert_true(signal instanceof TaskSignal);
assert_equals(signal.priority, 'user-visible');
}, "TaskSignal.any() returns a user-visible TaskSignal when no priority is specified");
test((t) => {
let signal = TaskSignal.any([], {priority: 'user-blocking'});
assert_equals(signal.priority, 'user-blocking');
signal = TaskSignal.any([], {priority: 'user-visible'});
assert_equals(signal.priority, 'user-visible');
signal = TaskSignal.any([], {priority: 'background'});
assert_equals(signal.priority, 'background');
}, "TaskSignal.any() returns a signal with the correct priority when intialized with a string");
test((t) => {
let controller = new TaskController({priority: 'user-blocking'});
let signal = TaskSignal.any([], {priority: controller.signal});
assert_equals(signal.priority, 'user-blocking');
controller = new TaskController({priority: 'user-visible'});
signal = TaskSignal.any([], {priority: controller.signal});
assert_equals(signal.priority, 'user-visible');
controller = new TaskController({priority: 'background'});
signal = TaskSignal.any([], {priority: controller.signal});
assert_equals(signal.priority, 'background');
}, "TaskSignal.any() returns a signal with the correct priority when intialized with a TaskSignal");
test((t) => {
let controller = new TaskController({priority: 'user-blocking'});
let signal = TaskSignal.any([], {priority: controller.signal});
assert_equals(signal.priority, 'user-blocking');
controller.setPriority('user-visible');
assert_equals(signal.priority, 'user-visible');
controller.setPriority('background');
assert_equals(signal.priority, 'background');
controller.setPriority('user-blocking');
assert_equals(signal.priority, 'user-blocking');
}, "TaskSignal.any() returns a signal with dynamic priority");
test((t) => {
const controller = new TaskController();
const signal = TaskSignal.any([], {priority: controller.signal});
let eventFiredCount = 0;
signal.onprioritychange = t.step_func((e) => {
assert_equals(e.target, signal,
`The event target is the signal returned by TaskSignal.any()`);
++eventFiredCount;
});
controller.setPriority('background');
assert_equals(eventFiredCount, 1);
controller.setPriority('user-visible');
assert_equals(eventFiredCount, 2);
controller.setPriority('user-blocking');
assert_equals(eventFiredCount, 3);
}, "Priority change events fire for composite signals");
test((t) => {
const controller = new TaskController();
let signal = TaskSignal.any([], {priority: controller.signal});
signal = TaskSignal.any([], {priority: signal});
signal = TaskSignal.any([], {priority: signal});
signal = TaskSignal.any([], {priority: signal});
signal = TaskSignal.any([], {priority: signal});
assert_equals(signal.priority, 'user-visible');
let eventFiredCount = 0;
signal.onprioritychange = t.step_func((e) => {
assert_equals(e.target, signal,
"The event target is the signal returned by TaskSignal.any()");
++eventFiredCount;
});
controller.setPriority('background');
assert_equals(eventFiredCount, 1);
assert_equals(signal.priority, 'background');
controller.setPriority('user-visible');
assert_equals(eventFiredCount, 2);
assert_equals(signal.priority, 'user-visible');
controller.setPriority('user-blocking');
assert_equals(eventFiredCount, 3);
assert_equals(signal.priority, 'user-blocking');
}, "Priority change events fire for composite signals with intermediate sources");
test((t) => {
const controller = new TaskController();
const signals = [];
const results = [];
let id = 0;
for (let i = 0; i < 3; i++) {
const signal = TaskSignal.any([], {priority: controller.signal});
const eventId = id++;
signal.addEventListener('prioritychange', () => {
results.push(eventId);
});
signals.push(signal);
}
for (let i = 0; i < 3; i++) {
const signal = TaskSignal.any([], {priority: signals[i]});
const eventId = id++;
signal.addEventListener('prioritychange', () => {
results.push(eventId);
});
}
controller.setPriority('background');
assert_equals(results.toString(), '0,1,2,3,4,5')
controller.setPriority('user-blocking');
assert_equals(results.toString(), '0,1,2,3,4,5,0,1,2,3,4,5')
}, "Priority change propagates to multiple dependent signals in the right order");
test((t) => {
const controller = new TaskController();
const signal = TaskSignal.any([], {priority: controller.signal});
let fired = false;
signal.onabort = t.step_func(() => {
assert_unreached("The signal should not abort");
fired = true;
});
controller.abort();
assert_false(fired);
}, "TaskSignal.any() does not propagate abort when not given dependent abort signals");
test((t) => {
const taskController = new TaskController();
const abortController = new AbortController();
const signal = TaskSignal.any([abortController.signal], {priority: taskController.signal});
let priorityFireCount = 0;
signal.onprioritychange = t.step_func(() => {
++priorityFireCount;
});
let abortFired = false;
signal.onabort = t.step_func(() => {
abortFired = true;
});
taskController.setPriority('background');
assert_equals(signal.priority, 'background');
assert_equals(priorityFireCount, 1);
taskController.abort();
assert_false(abortFired, "The signal should use abortController for abort");
abortController.abort();
assert_true(abortFired);
taskController.setPriority('user-visible');
assert_equals(signal.priority, 'user-visible');
assert_equals(priorityFireCount, 2);
}, "TaskSignal.any() propagates abort and priority");
test((t) => {
const controller = new TaskController();
const signal = TaskSignal.any([AbortSignal.abort()], {priority: controller.signal});
let fired = false;
signal.onprioritychange = t.step_func(() => {
fired = true;
});
controller.setPriority('background');
assert_true(fired);
}, "TaskSignal.any() propagates priority after returning an aborted signal");
test((t) => {
// Add a dependent in the initial event dispatch stage.
let controller = new TaskController();
let fired = false;
controller.signal.onprioritychange = t.step_func(() => {
fired = true;
const newSignal = TaskSignal.any([], {priority: controller.signal});
assert_equals(newSignal.priority, 'background');
newSignal.onprioritychange = t.unreached_func('onprioritychange called');
});
controller.setPriority('background');
assert_true(fired);
// Add a dependent while signaling prioritychange on dependents.
fired = false;
controller = new TaskController();
const signal = TaskSignal.any([], {priority: controller.signal});
signal.onprioritychange = t.step_func(() => {
fired = true;
const newSignal = TaskSignal.any([], {priority: signal});
assert_equals(newSignal.priority, 'background');
newSignal.onprioritychange = t.unreached_func('onprioritychange called');
});
controller.setPriority('background');
assert_true(fired);
}, "TaskSignal.any() does not fire prioritychange for dependents added during prioritychange");
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