third_party/WebKit/ManualTests/database-threading-stress-test.html

   1 <!doctype html>
   2 <html>
   3 <head>
   4
   5 <style>
   6 pre { padding: 5px; border: 1px solid black; }
   7 </style>
   8
   9 <script>
  10 var db;
  11
  12 try {
  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
  21 var highestId = 0;
  22 var allData = new Array();
  23
  24 function 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
  34 function testOpen()
  35 {
  36     for (var i = 0; i < 4; i++) {
  37         newData();
  38     }
  39
  40     setTimeout("testClose();", 0);
  41 }
  42
  43 function 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
  55 function updateTransactionCount()
  56 {
  57     document.getElementById("transactionCount").innerHTML = "Current Transaction Count: " + highestId;
  58     setTimeout("updateTransactionCount();", 1000);
  59 }
  60
  61 function 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
  74 addEventListener('load', loaded, false);
  75 </script>
  76 </head>
  77
  78 <body>
  79 This test stresses the database threading code by constantly opening transactions to the test database at a fast rate.<br>
  80 See radar 5729446 for more details.<br>
  81 <pre id="transactionCount">Current Transaction Count: 0</pre>
  82
  83 </body>
  84 </html>