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david_vickers's avatar
david_vickers
Occasional Contributor
5 years ago

Waiting for OCR checkpoint to appear as screen loads

I'm using a OCR checkpoint to wait for a Citrix application and display a login prompt.  When the window appears there's a brief loading screen that displays before the login prompt that I'm using th...
Checkpoints
Keyword Tests
  • david_vickers's avatar
    david_vickers
    5 years ago

    AlexKaras  Discovered the reason for the "Invalid Text" error.  When selecting the parameters in the Keyword test area, for setting the parameter I was using a String type instead of Object type.  The solution from the support site actually works really well for me. The only issue with it is that it's a infinite loop, so I modified the sample code and used a for loop instead to emulate a 10 second timeout (I could also pass another parameter for the seconds) 

     

    function CheckTextContents(textToSearch)
{
  // Recognize the text contents of the specified onscreen object (Citrix window)
  var text = OCR.Recognize(Aliases.wfica32.wndTransparentWindowsClient).FullText;
  // Search for the occurrence of the specified substring in the recognized text
  return (aqString.Find(text, textToSearch, 0, false) > -1)
}
function WaitForText(textToWait)
{
  for (x = 0; x < 10; x++) { 
    if (! CheckTextContents(textToWait))
      Delay(1000);
    else
      break;
  }
}

     

     

     

AlexKaras's avatar
AlexKaras
Champion Level 3
5 years ago

david_vickers :
Hi,

 

To rephrase what was written by BenoitB :

By definition, checkpoint is an action that performs some validation. In your scenario you are not validating, but waiting for some object/image to appear. Thus you should not use checkpoint but need to wait (via one of the .WaitXXX() methods) or wait in a loop until the sought for object/image appears or timeout occurs.

 

  • BenoitB's avatar
    BenoitB
    Community Hero
    5 years ago

    I think he can't use Waitxxx because it's on a Citrix receiver so only graphic (image or OCR).

  • david_vickers's avatar
    david_vickers
    Occasional Contributor
    5 years ago

    Thanks AlexKaras,

     

    Is there a sample that you could point me to on how to implement a loop check?  I would be using it multiple times within my test script as I navigate screens, so hopefully I can use it in a function/subroutine.

    • AlexKaras's avatar
      AlexKaras
      Champion Level 3
      5 years ago

      Hi,

       

      Exact implementation might depend on your needs and tested application.

       

      >  there's a brief loading screen that displays before the login prompt

      For example, one project had this code to wait until the spinner object disappears:

       

        // wait until spinner is hidden and control is populated with data
  oSpinner = oCombo.Parent.FindChild(
      ["ClrClassName", "WPFControlOrdinalNo"], ["ProgressIndicator", oCombo.WPFControlOrdinalNo], 3);
  iStartTime = Win32API.GetTickCount();
  iStopTime = iStartTime + timeout;
  while(((oSpinner.Visible) || (0 == oCombo.wItemCount)) && (iStopTime >= Win32API.GetTickCount()))
    aqUtils.Delay(500);

  if(Win32API.GetTickCount() > iStopTime)
    Log.Warning(
        aqString.Format("Control was not populated with data within %i sec timeout",
          aqConvert.VarToInt(timeout / 1000)),
        aqString.Format("Target combo-box: %s", oCombo.FullName),
        BuiltIn.pmNormal, null, Aliases.<tested app window>.Picture());
...

       

       

      Hope, you got the idea.

       

      • BenoitB's avatar
        BenoitB
        Community Hero
        5 years ago

        Two questions and one remark if you don't mind on your sample :

         

        - Good idea to use getTickCount, it's not using a Timer object like StopWatch (HISUtils) so ligther on the system, ;^)

         

        - Why checking Visible and not VisibleOnScreen ? I've lot of projects where spinner or toaster are Visible because preloaded on page but not VisibleOnScreen till they need for.

         

        - Why checking count of items of the combo, so here if items = 0 it's not the combo not available but the data of the combo which aren't available (data vs ihm) ?