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<!DOCTYPE html>
<meta charset=utf-8>
<title>Transactions deactivation timing</title>
<link rel="help" href="https://w3c.github.io/IndexedDB/#dom-idbdatabase-transaction">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=resources/support.js></script>
<script>
indexeddb_test(
(t, db, tx) => {
db.createObjectStore('store');
},
(t, db) => {
const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
const release_tx = keep_alive(tx, 'store');
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active after creation');
setTimeout(t.step_func(() => {
assert_false(is_transaction_active(tx, 'store'),
'Transaction should be inactive in next task');
release_tx();
t.done();
}), 0);
},
'New transactions are deactivated before next task');
indexeddb_test(
(t, db, tx) => {
db.createObjectStore('store');
},
(t, db) => {
const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
const release_tx = keep_alive(tx, 'store');
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active after creation');
Promise.resolve().then(t.step_func(() => {
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active in microtask checkpoint');
release_tx();
t.done();
}));
},
'New transactions are not deactivated until after the microtask checkpoint');
indexeddb_test(
(t, db, tx) => {
db.createObjectStore('store');
},
(t, db) => {
let tx, release_tx;
Promise.resolve().then(t.step_func(() => {
tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
release_tx = keep_alive(tx, 'store');
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active after creation');
}));
setTimeout(t.step_func(() => {
assert_false(is_transaction_active(tx, 'store'),
'Transaction should be inactive in next task');
release_tx();
t.done();
}), 0);
},
'New transactions from microtask are deactivated before next task');
indexeddb_test(
(t, db, tx) => {
db.createObjectStore('store');
},
(t, db) => {
let tx, release_tx;
Promise.resolve().then(t.step_func(() => {
tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
release_tx = keep_alive(tx, 'store');
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active after creation');
}));
Promise.resolve().then(t.step_func(() => {
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active in microtask checkpoint');
release_tx();
t.done();
}));
},
'New transactions from microtask are still active through the ' +
'microtask checkpoint');
indexeddb_test(
(t, db, tx) => {
db.createObjectStore('store');
},
(t, db) => {
// This transaction serves as the source of an event seen by multiple
// listeners. A DOM event with multiple listeners could be used instead,
// but not via dispatchEvent() because (drumroll...) that happens
// synchronously so microtasks don't run between steps.
const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active after creation');
const request = tx.objectStore('store').get(0);
let new_tx;
let first_listener_ran = false;
let microtasks_ran = false;
request.addEventListener('success', t.step_func(() => {
first_listener_ran = true;
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active in callback');
// We check to see if this transaction is active across unrelated event
// dispatch steps.
new_tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
assert_true(is_transaction_active(new_tx, 'store'),
'New transaction should be active after creation');
Promise.resolve().then(t.step_func(() => {
microtasks_ran = true;
assert_true(is_transaction_active(new_tx, 'store'),
'New transaction is still active in microtask checkpoint');
}));
}));
request.addEventListener('success', t.step_func(() => {
assert_true(first_listener_ran, 'first listener ran first');
assert_true(microtasks_ran, 'microtasks ran before second listener');
assert_true(is_transaction_active(tx, 'store'),
'Transaction should be active in callback');
assert_false(is_transaction_active(new_tx, 'store'),
'New transaction should be inactive in unrelated callback');
t.done();
}));
},
'Deactivation of new transactions happens at end of invocation');
</script>
|
