mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-25 17:25:08 +02:00
ea96072fee
This fixes the regression in idbindex_reverse_cursor.any.html, which was actually exposing the underlying issue of ignoring conflicting read/write transactions. Now, if a read/write transaction is in the queue, no transactions can coincide with its requests' execution.
62 lines
2.7 KiB
HTML
62 lines
2.7 KiB
HTML
<!DOCTYPE html>
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<script src="include.js"></script>
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<script>
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asyncTest(done => {
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setTimeout(() => {
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spoofCurrentURL("https://example.com/txn-scheduling.html");
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const dbName = "test-txn-scheduling";
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const delReq = indexedDB.deleteDatabase(dbName);
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delReq.onsuccess = function() {
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const openReq = indexedDB.open(dbName, 1);
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openReq.onupgradeneeded = function(e) {
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e.target.result.createObjectStore('store', {keyPath: 'key'});
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};
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openReq.onsuccess = function(e) {
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const db = e.target.result;
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let log = [];
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const print = (msg) => { log.push(msg); };
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// Case 1: readwrite then readwrite (overlapping scope)
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// txn2 must not start until txn1 finishes.
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const txn1 = db.transaction('store', 'readwrite');
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txn1.objectStore('store').put({key: 'a', val: 1});
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txn1.objectStore('store').put({key: 'a', val: 2});
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const txn2 = db.transaction('store', 'readwrite');
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// This get runs AFTER txn1 commits, so it must see val:2.
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const getReq = txn2.objectStore('store').get('a');
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getReq.onsuccess = () => print("rw+rw: val=" + getReq.result.val);
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txn2.objectStore('store').put({key: 'a', val: 3});
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// Case 2: readwrite then readonly (overlapping scope)
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// txn3 must not start until txn2 finishes.
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const txn3 = db.transaction('store', 'readonly');
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const getReq2 = txn3.objectStore('store').get('a');
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getReq2.onsuccess = () => print("rw+ro: val=" + getReq2.result.val);
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// Case 3: readonly then readwrite (overlapping scope)
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// txn4 must not start until txn3 finishes (though txn3 is readonly,
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// a subsequent readwrite cannot overlap with it).
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const txn4 = db.transaction('store', 'readwrite');
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txn4.objectStore('store').put({key: 'a', val: 4});
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const getReq3 = txn4.objectStore('store').get('a');
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getReq3.onsuccess = () => print("ro+rw: val=" + getReq3.result.val);
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txn1.oncomplete = () => print("txn1 complete");
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txn2.oncomplete = () => print("txn2 complete");
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txn3.oncomplete = () => print("txn3 complete");
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txn4.oncomplete = () => {
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print("txn4 complete");
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for (const msg of log)
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println(msg);
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db.close();
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indexedDB.deleteDatabase(dbName);
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done();
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};
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};
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};
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}, 0);
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});
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</script>
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