LayoutTests/storage/websql/read-transactions-running-concurrently.html - WebKit - Git at Google

 <html>
 <head>
 <script>

 function log(message)
 {
     document.body.innerHTML += message + "<br>";
 }

 function terminateTest()
 {
     if (window.testRunner)
         testRunner.notifyDone();
 }

 function openTestDatabase()
 {
     return openDatabase("ReadTransactionsRunningConcurrentlyTest",
                         "1.0",
                         "Test to make sure that multiple read transactions on different DB handles to the same DB run concurrently.",
                         32768);
 }

 var readTransactionsInProgress = 0;

 function runReadTransaction(db)
 {
     db.readTransaction(function(tx) {
             readTransactionsInProgress++;
         }, function(error) {
             log("Read transaction failed: " + error.message);
             terminateTest();
         }, function() {
             if (readTransactionsInProgress == 2)
                 log("Read transactions running concurrently.");
             readTransactionsInProgress--;
             if (readTransactionsInProgress == 0)
                 terminateTest();
         });
 }

 function runTest() {
     if (window.testRunner) {
         testRunner.clearAllDatabases();
         testRunner.dumpAsText();
         testRunner.waitUntilDone();
     }

     try {
         var db1 = openTestDatabase();
         var db2 = openTestDatabase();
         db1.transaction(function(tx) {
                 tx.executeSql("CREATE TABLE IF NOT EXISTS Test (Foo int);");
             }, function(error) {
                 log("Cannot create the Test table: " + error.message);
                 terminateTest();
             }, function() {
                 runReadTransaction(db1);
                 runReadTransaction(db2);
             });
      } catch(err) { log(err); }
 }
 </script>
 </head>
 <body onload="runTest();">
 This test tests that two read-only transactions on different handles to the same database run concurrently.<br>
 </body>
 </html>
	<html>
	<head>
	<script>

	function log(message)
	{
	document.body.innerHTML += message + "<br>";
	}

	function terminateTest()
	{
	if (window.testRunner)
	testRunner.notifyDone();
	}

	function openTestDatabase()
	{
	return openDatabase("ReadTransactionsRunningConcurrentlyTest",
	"1.0",
	"Test to make sure that multiple read transactions on different DB handles to the same DB run concurrently.",
	32768);
	}

	var readTransactionsInProgress = 0;

	function runReadTransaction(db)
	{
	db.readTransaction(function(tx) {
	readTransactionsInProgress++;
	}, function(error) {
	log("Read transaction failed: " + error.message);
	terminateTest();
	}, function() {
	if (readTransactionsInProgress == 2)
	log("Read transactions running concurrently.");
	readTransactionsInProgress--;
	if (readTransactionsInProgress == 0)
	terminateTest();
	});
	}

	function runTest() {
	if (window.testRunner) {
	testRunner.clearAllDatabases();
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	try {
	var db1 = openTestDatabase();
	var db2 = openTestDatabase();
	db1.transaction(function(tx) {
	tx.executeSql("CREATE TABLE IF NOT EXISTS Test (Foo int);");
	}, function(error) {
	log("Cannot create the Test table: " + error.message);
	terminateTest();
	}, function() {
	runReadTransaction(db1);
	runReadTransaction(db2);
	});
	} catch(err) { log(err); }
	}
	</script>
	</head>
	<body onload="runTest();">
	This test tests that two read-only transactions on different handles to the same database run concurrently.<br>
	</body>
	</html>