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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /dom/fs/fs-writable_unlocked_on_tab_close.https.window.html - WPT Dashboard Interop Dashboard
// META: title=Origin private file system used from multiple tabs
// META: script=support/testHelpers.js
promise_test(async t => {
const bc = new BroadcastChannel("Coordinate writables");
function firstReady(win) {
return new Promise(resolve => {
// Blur triggers after the unload event and after window.closed is set
win.onblur = () => {
// Closing the low-level file handle may get stuck, but the unlocking
// request can only be sent to the parent after the handle is closed.
// There is no guarantee when or if the closing will be complete.
//
// Therefore, the content process shutdown does not wait for the
// completion but sets window.closed and calls the unload listeners
// while actually still holding onto some resources.
//
// Since in this test we mainly want to ensure that a file
// does not remain locked indefinitely, we wait for a reasonable amount
// of time before creating a new writable, corresponding roughly to
// a 500ms closing delay.
const timeoutMs = 400;
setTimeout(() => {
resolve(win);
}, timeoutMs);
};
});
}
const firstTabName = "support/fs-open_writable_then_close_tab.sub.html";
const firstTab = await firstReady(window.open(firstTabName));
assert_true(firstTab.closed, "Is the first tab already closed?");
function secondReady(win) {
return new Promise(resolve => {
bc.onmessage = e => {
if (e.data === "Second window ready!") {
resolve(win);
}
};
});
}
const secondTabName = "support/fs-open_writable_after_trigger.sub.html";
const secondTab = await secondReady(window.open(secondTabName));
let isDone = false;
let childStatus = "Success";
const secondSucceeded = new Promise(resolve => {
bc.onmessage = e => {
isDone = true;
if (e.data !== "Success") {
childStatus = e.data;
}
resolve();
};
});
bc.postMessage("Create writable in the second window");
await secondSucceeded;
assert_true(isDone, "Did the second tab respond?");
await fetch_tests_from_window(secondTab);
assert_equals(childStatus, "Success");
}, `writable available for other tabs after one tab is closed`);