1<!doctype html>
2<html>
3<head>
4
5<style>
6pre { padding: 5px; border: 1px solid black; }
7</style>
8
9<script>
10var db;
11
12try {
13    if (window.openDatabase) {
14        db = openDatabase("StressTest1", "1.0", "Database Stress Test", 200000);
15        if (!db)
16            alert("Failed to open the database on disk.  This is probably because the version was bad or there is not enough space left in this domain's quota");
17    } else
18        alert("Couldn't open the database.");
19} catch(err) { }
20
21var highestId = 0;
22var allData = new Array();
23
24function newData()
25{
26    var id = ++highestId;
27    allData.push(id);
28    db.transaction(function (tx) 
29    {
30        tx.executeSql("INSERT INTO FillerData (id, filler) VALUES (?, randomblob(1024))", [id]);
31    }); 
32}
33
34function testOpen()
35{
36    for (var i = 0; i < 4; i++) {
37        newData();
38    }
39
40    setTimeout("testClose();", 0);
41}
42
43function testClose()
44{    
45    db.transaction(function(tx)
46    {   
47        for (var i = 0; i < allData.length; i++)
48            tx.executeSql("DELETE FROM FillerData WHERE id = ?", [allData[i]]);
49
50        allData = new Array();
51    });
52    setTimeout("testOpen();", 0);
53}
54
55function updateTransactionCount()
56{
57    document.getElementById("transactionCount").innerHTML = "Current Transaction Count: " + highestId;
58    setTimeout("updateTransactionCount();", 1000);
59}
60
61function loaded()
62{
63    db.transaction(function(tx) {
64        tx.executeSql("SELECT COUNT(*) FROM FillerData", [], function(result) { }, function(tx, error) {
65            tx.executeSql("CREATE TABLE FillerData (id REAL UNIQUE, filler)", [], function(result) { 
66            });
67        });
68    });
69
70    setTimeout("testOpen();", 0);
71    setTimeout("updateTransactionCount();", 1000);
72}
73
74addEventListener('load', loaded, false);
75</script>
76</head>
77
78<body>
79This test stresses the database threading code by constantly opening transactions to the test database at a fast rate.<br>
80See radar 5729446 for more details.<br>
81<pre id="transactionCount">Current Transaction Count: 0</pre>
82
83</body>
84</html>
85