Gingerbread MR1  |  2.3.7_r1
Html程序  |  104行  |  3.24 KB 

<html>
<head>
<script>

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

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

function openTestDatabase()
{
    return openDatabase("ReadAndWriteTransactionsDontRunTogetherTest",
                        "1.0",
                        "Test to make sure that read and write transactions on different DB handles to the same DB don't run at the same time.",
                        32768);
}

var readTransactionsInProgress = 0;
var writeTransactionsInProgress = 0;
var totalTransactions = 0;
var finishedTransactions = 0;

function runTransaction(db, readOnly)
{
    var transactionFunction = (readOnly ? db.readTransaction : db.transaction);
    transactionFunction.call(db, function(tx) {
            if (readOnly) {
                if (writeTransactionsInProgress != 0) {
                    log("Read transaction starting while write transaction in progress.");
                    terminateTest();
                }
                readTransactionsInProgress++;
            } else {
                if ((readTransactionsInProgress != 0) || (writeTransactionsInProgress != 0)) {
                    log("Write transaction starting while another transaction in progress.");
                    terminateTest();
                }
                writeTransactionsInProgress++;
            }
            tx.executeSql("SELECT * FROM Test;");
        }, function(error) {
            log((readOnly ? "Read" : "Write") + " transaction failed: " + error.message);
            terminateTest();
        }, function() {
             finishedTransactions++;
             if (readOnly)
                 readTransactionsInProgress--;
             else
                 writeTransactionsInProgress--;
             log("Transaction successful.");
             if ((finishedTransactions == totalTransactions) && (readTransactionsInProgress == 0) && (writeTransactionsInProgress == 0))
                 terminateTest();
        });
}

function runReadAndWriteTransactions(db1, db2, db3)
{
    totalTransactions = 10;
    finishedTransactions = 0;
    runTransaction(db1, true);
    runTransaction(db2, true);
    runTransaction(db1, false);
    runTransaction(db1, true);
    runTransaction(db2, true);
    runTransaction(db3, true);
    runTransaction(db1, false);
    runTransaction(db2, false);
    runTransaction(db1, true);
    runTransaction(db3, true);
}

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

    try {
        var db1 = openTestDatabase();
        var db2 = openTestDatabase();
        var db3 = 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() {
                runReadAndWriteTransactions(db1, db2, db3);
            });
     } catch(err) {}
}
</script>
</head>
<body onload="runTest();">
This test tests that read and write transactions on different handles to the same database don't run together.<br>
</body>
</html>