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      1 <html>
      2 <head>
      3 <script>
      4 
      5 function log(message)
      6 {
      7     document.body.innerHTML += message + "<br>";
      8 }
      9 
     10 function GC()
     11 {
     12     // Force GC.
     13     if (window.GCController)
     14         GCController.collect();
     15     else {
     16         for (var i = 0; i < 10000; ++i) {
     17             ({ });
     18         }
     19     }
     20 }
     21 
     22 // Variable for the database that will never be forgotten
     23 var persistentDB = 0;
     24 // Variable for the forgotten database
     25 var forgottenDB = 0;
     26 
     27 var completed = 0;
     28 function checkCompletion()
     29 {
     30     if (++completed == 2 && window.layoutTestController)
     31         layoutTestController.notifyDone();
     32 }
     33 
     34 function runTest()
     35 {
     36     if (window.layoutTestController) {
     37         layoutTestController.dumpAsText();
     38         layoutTestController.waitUntilDone();
     39     }
     40     
     41     persistentDB = openDatabase("MultipleDatabasesTest1", "1.0", "Test one out of a set of databases being destroyed (1)", 32768);
     42     forgottenDB = openDatabase("MultipleDatabasesTest2", "1.0", "Test one out of a set of databases being destroyed (2)", 32768);
     43 
     44     persistentDB.transaction(function(tx) {
     45         tx.executeSql("CREATE TABLE IF NOT EXISTS DataTest (randomData)", [], function(tx, result) { 
     46             for (var i = 0; i < 25; ++i)
     47                 tx.executeSql("INSERT INTO DataTest (randomData) VALUES (1)", []);
     48         }); 
     49     }, function(err) {
     50         log("Persistent Database Transaction Errored - " + err);
     51         checkCompletion();
     52     }, function() {
     53         log("Persistent Database Transaction Complete");
     54         checkCompletion();
     55     });
     56 
     57     forgottenDB.transaction(function(tx) {
     58         tx.executeSql("CREATE TABLE IF NOT EXISTS EmptyTable (unimportantData)", []);
     59     }, function(err) {
     60         log("Forgotten Database Transaction Errored - " + err);
     61         forgottenDB = 0;
     62         GC();
     63         checkCompletion();
     64     }, function() {
     65         log("Forgotten Database Transaction Complete");
     66         forgottenDB = 0;
     67         GC();
     68         checkCompletion();
     69     });
     70 }
     71 
     72 </script>
     73 <body onload="runTest();">
     74 This test opens two databases, queues up a series of operations on both, then "forgets" about one of them.
     75 After forcing GC, resources associated with that database should be freed gracefully.<br>
     76 </body>
     77 </html>
     78