I am currently assisting in a proof of concept using Selenium 2 / WebDriver with C# against an ASP.NET MVC application using the InternetExplorerDriver.
The application uses a standard pattern for notifying users that a record has saved. This works by settings TempData to include "Record saved successefully", and if TempData is present in the View, the view will alert the message.
Whilst working on Selenium tests for this functionality, we are receiving inconstitant behaviour from the below C# / Selenium test code:
_driver.Navigate().GoToUrl(_baseUrl + "/Amraam/List");
_driver.FindElement(By.LinkText("Create New")).Click();
_driver.FindElement(By.Id("txtAmraamSerialNumber")).SendKeys("CC12345");
var selectElement = new SelectElement(_driver.FindElement(By.Id("LocationId")));
selectElement.SelectByText("Tamworth");
_driver.FindElement(By.Id("btnSave")).Click();
var wait = new WebDriverWait(_driver, defaultTimeout);
IAlert alert = wait.Until(drv => drv.SwitchTo().Alert());
_alertText = alert.Text;
alert.Accept();
Assert.That(_alertText, Is.EqualTo("Record successfully saved"));
Approximately 50% of the time, Selinium will fail with a
OpenQA.Selenium.NoAlertPresentException : No alert is active
I struggle to find an exact way to replicate the issue, and worry regarding the inconsistency aspect. If it failed consistently, then we could debug and track the problem down.
The handling of alerts and prompts within Selenium 2 is pretty new and is still under active development.
Your failures are probably due to timing, so I would suggest writing a wrapper method around the call to SwitchTo().Alert() so that you catch the OpenQA.Selenium.NoAlertPresentException and ignore it until the timeout expires.
Something as simple as this should work:
private IAlert AlertIsPresent(IWebDriver drv)
{
try
{
// Attempt to switch to an alert
return drv.SwitchTo().Alert();
}
catch (OpenQA.Selenium.NoAlertPresentException)
{
// We ignore this execption, as it means there is no alert present...yet.
return null;
}
// Other exceptions will be ignored and up the stack
}
This line
IAlert alert = wait.Until(drv => drv.SwitchTo().Alert());
would then become
IAlert alert = wait.Until(drv => AlertIsPresent(drv));
Hope this will be helpful for waiting and click
WebDriverWait(driver,4).until(EC.alert_is_present())
driver.switch_to.alert.accept()
Related
I have an activity indicator on xaml page. Initially its IsVisible property is false. I have a button on page. When user click on button it calls a web service to get data. I change the value of IsVisible property to true before calling the service so that activity indicator starts to display on page and after successful calling of service I change its value to again false so that it doesn't show any more on page.
But it is not working. I know the actual problem. When we call the web service the UI thread gets block and it doesn't show the activity indicator.
How I can enable the UI thread when web service gets called so that activity indicator can show on page until we get the data?
Try making your webservice call into an async and await it.
Depending on how you've structured things you may have to use a TaskCompletionSource as the following example demonstrates.
In this example when the button is clicked, the button is made invisible, and the ActivityIndicator is set to IsRunning=True to show it.
It then executes your long running task / webservice in the function ExecuteSomeLongTask using a TaskCompletionSource.
The reason for this is that in our button click code, we have the final lines:-
objActivityIndicator1.IsRunning = false;
objButton1.IsVisible = true;
That stop the ActivityIndicator from running and showing, and also set the button back to a visible state.
If we did not use a TaskCompletionSource these lines would execute immediately after calling the ExecuteSomeLongTask if it was a normal async method / function, and would result in the ActivityIndicator not running and the button still being visible.
Example:-
Grid objGrid = new Grid()
{
};
ActivityIndicator objActivityIndicator1 = new ActivityIndicator();
objGrid.Children.Add(objActivityIndicator1);
Button objButton1 = new Button();
objButton1.Text = "Execute webservice call.";
objButton1.Clicked += (async (o2, e2) =>
{
objButton1.IsVisible = false;
objActivityIndicator1.IsRunning = true;
//
bool blnResult = await ExecuteSomeLongTask();
//
objActivityIndicator1.IsRunning = false;
objButton1.IsVisible = true;
});
objGrid.Children.Add(objButton1);
return objGrid;
Supporting function:-
private Task<bool> ExecuteSomeLongTask()
{
TaskCompletionSource<bool> objTaskCompletionSource1 = new TaskCompletionSource<bool>();
//
Xamarin.Forms.Device.StartTimer(new TimeSpan(0, 0, 5), new Func<bool>(() =>
{
objTaskCompletionSource1.SetResult(true);
//
return false;
}));
//
return objTaskCompletionSource1.Task;
}
You need to do your work in an asynchronous way. Or in other words: Use Asnyc & Await to ensure, that you UI works well during the call.
You can find more informations in the Xamarin Docs.
async and await are new C# language features that work in conjunction
with the Task Parallel Library to make it easy to write threaded code
to perform long-running tasks without blocking the main thread of your
application.
If you need further asistance, please update your question and post your code or what you have tried so far.
I have been working on a WCF web service, which is used by a mobile app that would send some data to it and save to DB.
One of the test case is that we try to append 2 (or more) records in the app, and the service is called to do a batch insert / update action.
Everything goes fine when I test using localhost, but when we test it using production server, only
the first record is saved, while the other record triggers the error message
Unable to determine a valid ordering for dependent operations...store-generated values.
I have no idea what is the cause and how to solve it. I have done some research and I am quite sure that the related model/DB table has NO circular dependency or self dependency.
Below is a snippet of the web service:
public void submit(List<SubmissionParameter> param){
using (var context = ObjectContextManager.AuditEnabledInstance){
foreach (var item in param){
ReadingSubmission readingSubmission = context.ReadingSubmissions.Where(p => p.ReadingSubmissionUniqueIdentifier == item.Readingsubmissionuniqueidentifier).SingleOrDefault();
if (readingSubmission == null){
readingSubmission = new ReadingSubmission();
context.ReadingSubmissions.AddObject(readingSubmission);
}
readingSubmission.ReadingSubmissionUniqueIdentifier = item.Readingsubmissionuniqueidentifier;
readingSubmission.SystemID = item.Systemid;
readingSubmission.UserID = item.Userid;
foreach (var record in item.Readings){
SystemReading systemReading = context.SystemReadings.Where(p => p.SystemReadingUniqueIdentifier == record.Systemreadinguniqueidentifier).SingleOrDefault();
if (systemReading == null){
systemReading = new SystemReading();
readingSubmission.SystemReadings.Add(systemReading);
}
systemReading.SystemReadingUniqueIdentifier = record.Systemreadinguniqueidentifier;
systemReading.MeasurementID = record.Measurementid;
}
context.SaveChanges();
}
}
}
ReadingSubmission and SystemReading is a 1 to many relation
SubmissionParameter is just a transmission object as the mobile client will send the JSON object to this web service.
I use Telerik Fiddler to post the JSON into this web service for testing, so I am quite sure the problem is not at the mobile client side.
Any help is appreciated! Thanks!
Finally I solve the problem though I am not quite sure why it works.
I move the context.SaveChanges() out of the foreach loop then it all works again for
both localhost and production
Hope it can help someone to save some time
I have an ASP.NET Web Forms application. I want to have a button to post back to the server that will use my fields on my form (after validation) as parameters to a server process that will generate a document and stream it back to the browser. I want the form to be updated with some status results.
What is the best way to achieve this? Right now, I've got the button click generating the document and streaming it back to the browser (it's a Word document and the dialog pops up, and the Word document can be opened successfully) but the page doesn't get updated.
I have jQuery in my solution, so using js isn't an issue if that is required.
I have a very similar process on one of my servers, and the way I've handled it is to create a temporary document on the server rather than doing a live stream. It requires a bit of housekeeping code to tidy it up, but it does mean that you can return the results of the generation and then do a client-side redirect to the generated document if successful. In my case, I'm using jQuery and AJAX to do the document generation and page update, but the same principle should also apply to a pure WebForms approach.
This was way more difficult to do than I thought. The main issue is with opening a new browser window for a Word document. The window briefly flashes up, then closes - no Word document appears. It seems to be a security issue.
If i click a button on my page, I can stream the Word doc back as the response, and the browser dialog pops up allowing me to Open/Save/Cancel, but of course, my page doesn't refresh.
My final solution to this was to use a client script on the button click to temporarily set the form's target to _blank. This forces the response to the click on the postback to go to a new browser window (which automatically closes after the download dialog is dismissed):
<asp:Button Text="Generate Doc" runat="server" ID="btnGenerateDoc"
onclick="btnGenerateDoc_Click" OnClientClick="SetupPageRefresh()" />
My SetupPageRefresh function is as follows:
function SetupPageRefresh() {
// Force the button to open a new browser window.
form1.target = '_blank';
// Immediately reset the form's target back to this page, and setup a poll
// to the server to wait until the document has been generated.
setTimeout("OnTimeout();", 1);
}
Then my OnTimeout function resets the target for the form, then starts polling a web service to wait until the server process is complete. (I have a counter in my Session that I update once the process has completed.)
function OnTimeout() {
// Reset the form's target back to this page (from _blank).
form1.target = '_self';
// Poll for a change.
Poll();
}
And the Poll function simply uses jQuery's ajax function to poll my web service:
function Poll() {
var currentCount = $("#hidCount").val();
$.ajax({
url: "/WebService1.asmx/CheckCount",
data: JSON.stringify({ currentCount: currentCount }),
success: function (data) {
var changed = data.d;
if (changed) {
// Change recorded, so refresh the page.
window.location = window.location;
}
else {
// No change - check again in 1 second.
setTimeout("Poll();", 1000);
}
}
});
}
So this does a 1 second poll to my web service waiting for the Session's counter to change from the value in the hidden field on the page. This means it doesn't matter how long the server process takes to generate the Word document (and update the database, etc.) the page won't refresh until it's done.
When the web service call comes back with true, the page is refreshed with the window.location = window.location statement.
For completeness, my Web Service looks like this:
/// <summary>
/// Summary description for WebService1
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class WebService1 : WebService
{
[WebMethod(EnableSession=true)]
public bool CheckCount(int currentCount)
{
if (Session["Count"] == null)
Session["Count"] = 0;
var count = (int)Session["Count"];
var changed = count != currentCount;
return changed;
}
}
Hopefully that helps somebody else!
I don't know much about Flash but we are working on a site that has a flash form and when the users pick an option, like selecting a value from a drop down list, we need the value to be passed to asp.net server-side code. What's the easiest way to do this?
Flash can invoke server side service. So use GET or POST to pass data
You could explore these options:
1) Communicate between the SWF and the containing page through JavaScript
2) Communicate via asp.net webservices from the SWF directly to the webservice.
3) Not sure but could probably do a POST to a processing aspx page?
HTH
I think a good option is to use the XML class so consider this:
var xmlRequest = new XML();
xmlRequest.onLoad = parseXMLResponse;
xmlRequest.load("http://yourpathtoyourserver/file.aspx?listselectedvalue=something");
function parseXMLRequest(loaded)
{
trace("hi");
}
You can also have the page give you data back this way so it's not just one way communication.
Assuming you are using Action Script 2.
Read the important notes at the bottom of each codes pertain to sending and retrieving data from flash to .net page. Explanation of the code is in the comment inside the code.
Flash Part (Action Script 2)
//function to send collected form data to asp.net page
//use other control/button to call this function
//important: in order for the 'onLoad' event to work correctly, this function has to be 'Void'
function sendForm():Void
{
//create LoadVars object
var lv_in:LoadVars = new LoadVars();
var lv_out:LoadVars = new LoadVars();
//set onLoad event
lv_in.onLoad = function(success:Boolean)
{
//if success, meaning data has received from .net page, run this code
if (success)
{
//lv_in.status is use to get the posted data from .Net page
statusMsg.text = "Thank you for filling up the form!" + lv_in.status;
}
//if fail, run this code
else
{
statusMsg.text = "The form you are trying to fill up has an error!";
}
}
//this is the collected data from the form
lv_out.userName = txtUserName.text;
lv_out.userAddress = txtUserAddress.text;
lv_out.userBirthday = txtUserBirthday.text;
//begin invoke .net page
lv_out.sendAndLoad("ProcessDataForm.aspx", lv_in, "POST");
}
Important note:
The function that contain onLoad event, in this case sendForm function, has to be Void function, meaning it's not returning value. If this function return value, what happen is the function will be executed all the way without waiting for the returned data from .net page, thus the onLoad event will not be set properly.
.Net Part
public void ProcessData
{
//process the data here
Response.Write("status=processed&");
}
Important note:
To send data/message back to flash, you can use Response.Write. However, if you want Action Script to parse the posted message/data from .Net page keep in mind you have to include & symbol at the end of the message. When parsing data/message, Action Script will stop at & symbol, thus leave the rest of the message alone and only get the message under sent variable.
Whenever I debug my AIR app it keeps suspending at a certain line of code...it doesn't give me a reason why, it just says Main Thread (Suspended) No error, no breakpoint at this location either. If I comment out the code so that, that line does not execute, it just does the same thing on a different line of code.
I have no clue why.... What should I do?
Thanks!!
Here is the function it happens in:
public function update (): void
{
dispatchEvent ( new Event ( EVENT_UPDATE_DOWNLOAD_STARTED ) );
var request: URLRequest = new URLRequest ( _newVersionUrl );
urlStream = new URLStream();
updateFileData = new ByteArray();
urlStream.addEventListener ( Event.COMPLETE, streamDownloadComplete );
urlStream.addEventListener ( ProgressEvent.PROGRESS, streamDownloadProgress );
urlStream.addEventListener ( IOErrorEvent.IO_ERROR, versionCheckIOErrorHandler );
urlStream.load(request);
}
this is the line it suspends on:
updateFileData = new ByteArray();
updateFileData is defined outside the function like so:
protected var updateFileData: ByteArray;
I should mention...this code is the code that Updates the version of air..could this be suspending because its trying to update while in adl.exe?
Thanks
Are you using FlexBuilder?
If you are, have you made sure there isn't a breakpoint set somewhere in your SDK source (I sometimes do this by mistake)?
Try checking, via the Debugging profile (Window > Perspective > Flex Debugging), the the Breakpoints view to see whether there's anything in there you don't recognize.
Also, when you're hung up, try stepping through the code (e.g., using F5 or F6) to see if that helps you figure out where the debugger's stopped.
Not 100% sure, because you're not hitting the error but - This might be an issue caused because the docs say you can't do the update while in the debugger:
When testing an application using the
AIR Debug Launcher (ADL) application,
attempting to update the application
results in an IllegalOperationError
exception.
This is from the livedocs.