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