1 files changed, 112 insertions, 0 deletions
diff --git a/LayoutTests/storage/hash-change-with-xhr.js b/LayoutTests/storage/hash-change-with-xhr.js
new file mode 100644
index 0000000..4290681
--- /dev/null
+++ b/LayoutTests/storage/hash-change-with-xhr.js
@@ -0,0 +1,112 @@
+var DB_UPDATE_INTERVAL = 100;
+var SEND_XHR_INTERVAL = 100;
+var BACK_INTERVAL = 100;
+var CREATE_HEALTH_TABLE = 'CREATE TABLE IF NOT EXISTS health (key VARCHAR(16) PRIMARY KEY);';
+var UPDATE_DATA = 'REPLACE INTO health VALUES("health-check-key");';
+ 
+var db = openDatabaseWithSuffix('bug25710', '1.0', 'LayoutTest for bug 25710', 102400);
+var backIterations;
+var xhrFctIntervalId;
+var backFctIntervalId;
+var successCheckIntervalId;
+var dbFctIntervalId;
+var successes;
+var databaseUpdates;
+var stoppedIntervals;
+ 
+function stopIntervals()
+{
+    stoppedIntervals = true;
+    clearInterval(dbFctIntervalId);
+    clearInterval(xhrFctIntervalId);
+    clearInterval(backFctIntervalId);
+}
+
+function stopTest(message)
+{
+    if (!stoppedIntervals)
+        stopIntervals();
+
+    log(message);
+
+    if (window.layoutTestController)
+        layoutTestController.notifyDone();
+}
+    
+function updateDatabase()
+{
+    databaseUpdates++;  
+    db.transaction(function(transaction) {
+        transaction.executeSql(UPDATE_DATA, [], function() {}, errorHandler);
+    }, errorHandler, function() {
+        successes++;
+    });
+}
+
+function checkForSuccess()
+{
+    if (successes == databaseUpdates) {
+        stopTest('Test Complete, SUCCESS');
+        clearInterval(successCheckIntervalId);
+    }
+}
+ 
+function errorHandler(tx, error)
+{
+    log('DB error, code: ' + error.code + ', msg: ' + error.message);
+    stopTest('Test Complete, FAILED');
+}
+ 
+function sendXhr()
+{
+    xhr = new XMLHttpRequest();
+    xhr.open('GET', location.href, true);
+    xhr.send('');
+}
+ 
+function invokeBack()
+{
+    backIterations--;
+    if (backIterations) {
+        history.back();
+    } else {
+        stopIntervals();
+        // Allow a little time for all the database transactions to complete now we've stopped making them.
+        successCheckIntervalId = setInterval(checkForSuccess, 250);
+        // If we don't finish before this time, then we consider the test failed.
+        setTimeout(function() { stopTest('Timed out waiting for transactions to complete. FAILED'); }, 20000);
+        
+    }
+}
+
+function runTest()
+{
+    backIterations = 10;
+    consecutiveFailures = 0;
+    successes = 0;
+    databaseUpdates = 0;
+    stoppedIntervals = false;
+
+    // Create some hashes so we can call history.back().
+    log('Changing the hash to create history entries.');
+    for (var i = 0; i < backIterations; i++) {
+        setLocationHash(i);
+    }
+
+    // Init the database.
+    db.transaction(function(transaction) {
+        transaction.executeSql(CREATE_HEALTH_TABLE, [], function() {}, errorHandler);
+    }, errorHandler, function() {
+        // Give a little for the database to 'warm up' before making xhr requests
+        // and calling history.back().
+        setTimeout(function() {
+            log('Db is warmed up');
+
+            // NOTE: If we don't make any xhr requests, then the test
+            // successfully passes (comment this line out).
+            xhrFctIntervalId = setInterval(sendXhr, SEND_XHR_INTERVAL);
+            backFctIntervalId = setInterval(invokeBack, BACK_INTERVAL);
+            dbFctIntervalId = setInterval(updateDatabase, DB_UPDATE_INTERVAL);
+        }, 500);
+    });
+}