gecko-dev/testing/web-platform/tests/IndexedDB/transaction-requestqueue.htm

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<!DOCTYPE html>
<meta charset=utf-8>
<title>Transactions have a request queue</title>
<link rel="author" href="mailto:odinho@opera.com" title="Odin Hørthe Omdal">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=support.js></script>
<script>
var db, t = async_test(),
keys = { txn: [], txn2: [] },
open_rq = createdb(t)
open_rq.onupgradeneeded = function(e) {
var i, os;
db = e.target.result;
for (i = 1; i < 6; i++)
{
os = db.createObjectStore("os" + i, { autoIncrement: true, keyPath: "k" });
os.add({ os: "os" + i });
os.put({ os: "os" + i, k: i});
os.add({ os: "os" + i });
}
}
open_rq.onsuccess = function(e) {
var txn = db.transaction(["os2", "os1", "os3", "os5"])
txn.objectStore("os1").openCursor().onsuccess = reg("txn")
txn.objectStore("os3").openCursor().onsuccess = reg("txn")
txn.objectStore("os1").get(2).onsuccess = reg("txn")
txn.objectStore("os2").get(3).onsuccess = reg("txn")
var txn2 = db.transaction(["os4", "os3", "os1", "os5"])
var os4 = txn2.objectStore("os4")
for (var i=0; i < 3; i++) {
os4.openCursor().onsuccess = reg("txn2")
os4.get(5).onsuccess = reg("txn2")
os4.get(4).onsuccess = reg("txn2")
txn.objectStore("os2").get(1).onsuccess = reg("txn")
txn2.objectStore("os3").get(1).onsuccess = reg("txn2")
}
txn2.objectStore("os1").get(2).onsuccess = reg("txn2")
txn.objectStore("os1").openCursor(null, "prev").onsuccess = reg("txn")
os4.openCursor(null, "prev").onsuccess = reg("txn2")
txn.oncomplete = t.step_func(finish);
txn2.oncomplete = t.step_func(finish);
}
function reg(n) {
return t.step_func(function (e) {
var v = e.target.result;
if (v.value) v = v.value;
keys[n].push(v.os + ": " + v.k);
});
}
var finish_to_go = 2;
function finish() {
if (--finish_to_go)
return;
assert_array_equals(keys['txn'], [
"os1: 1",
"os3: 1",
"os1: 2",
"os2: 3",
"os2: 1", "os2: 1", "os2: 1",
"os1: 2",
], 'transaction keys');
assert_array_equals(keys['txn2'], [
"os4: 1", "os4: 5", "os4: 4", "os3: 1",
"os4: 1", "os4: 5", "os4: 4", "os3: 1",
"os4: 1", "os4: 5", "os4: 4", "os3: 1",
"os1: 2",
"os4: 5",
], 'transaction 2 keys');
t.done();
}
</script>
<div id="log"></div>