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Bug 1918036 - IDB: Add a test for rapid addition and deletion of blobs; r=dom-storage-reviewers,asuth

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Differential Revision: https://phabricator.services.mozilla.com/D221767
This commit is contained in:
Jan Varga 2024-09-25 05:18:35 +00:00
parent 90a7b761ba
commit 4fa78afa11
2 changed files with 102 additions and 0 deletions
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2
dom/indexedDB/test/mochitest-common.toml
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@ -225,6 +225,8 @@ skip-if = ["verify"]
["test_file_put_get_values.html"]
["test_file_repeated_add_delete.html"]
["test_file_replace.html"]
["test_file_resurrection_delete.html"]

100
dom/indexedDB/test/test_file_repeated_add_delete.html Normal file
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@ -0,0 +1,100 @@
<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<head>
<title>Indexed Database Blob Add/Delete Stress Test</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script type="text/javascript">
/*
* This is a stress test which rapidly adds and deletes blobs in a row in
* separate transactions. Internally, blobs are only removed when all memory
* and database references drop to zero. At that point an asynchronous
* delete operation is scheduled which removes the backing file from disk.
* So the overall behavior and timing depends on cycle collection and
* garbage collection. The main goal of this test is to make it more likely
* that internal structures are accessed by multiple threads at the same
* time, potentially discovering races or other issues.
*
* Note that the test needs to always create a new blob and a new
* transaction, otherwise new backing files wouldn't be created due to
* internal optimizations for de-duplication.
*/
function* testSteps()
{
const READ_WRITE = "readwrite";
const name = window.location.pathname;
const objectStoreName = "Blobs";
{
const request = indexedDB.open(name, 1);
request.onerror = errorHandler;
request.onupgradeneeded = grabEventAndContinueHandler;
request.onsuccess = grabEventAndContinueHandler;
}
{
const event = yield undefined;
is(event.type, "upgradeneeded", "Got correct event type");
const db = event.target.result;
db.onerror = errorHandler;
const objectStore = db.createObjectStore(objectStoreName, {});
objectStore.add(getRandomBlob(1), 1);
}
{
const event = yield undefined;
is(event.type, "success", "Got correct event type");
const db = event.target.result;
db.onerror = errorHandler;
let index = 1;
function doWork() {
const transaction = db.transaction([objectStoreName], READ_WRITE);
const objectStore = transaction.objectStore(objectStoreName);
const deleteRequest = objectStore.delete(index);
deleteRequest.onsuccess = function () {
index++;
const addRequest = objectStore.add(getRandomBlob(1), index);
addRequest.onsuccess = function () {
if (index < 1000) {
doWork();
} else {
continueToNextStep();
}
};
};
}
doWork();
yield undefined;
}
finishTest();
}
</script>
<script type="text/javascript" src="file.js"></script>
<script type="text/javascript" src="helpers.js"></script>
</head>
<body onload="runTest();"></body>
</html>