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NRE on getting the main window

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Al
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Al asked on 16 Nov 2013, 09:08 AM
I was just about to test drive this, on the first attempt I was trying to run the app, get the main window, but stopped right there. Here's the exception I got on accessing MainWindow:

   at ArtOfTest.Common.Win32.Connector.InjectCode(IntPtr handle, String assemblyAndClass, String pipename, String pid, Boolean waitForDocument)
   at ArtOfTest.WebAii.Wpf.WpfWindow.ConnectToWindow(IntPtr handle, String pipename, String pid)
   at ArtOfTest.WebAii.Wpf.WpfApplication.get_MainWindow()
   at ArtOfTest.WebAii.Core.Manager.LaunchNewApplication(ProcessStartInfo pinfo)
   at NServiceBus.Profiler.FunctionalTests.StudioTestBase.Can_show_shell_window() in c:\Projects\NSBProfiler\NServiceBus.Profiler.FunctionalTests\StudioTestBase.cs:line 31

And what I did was pretty standard:

[Test]
public void Can_show_shell_window()
{
    var appPath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), ApplicationProcess);
    var processStartInfo = new ProcessStartInfo
    {
        FileName = appPath,
        UseShellExecute = false,
        CreateNoWindow = true,
        RedirectStandardOutput = true,
        RedirectStandardError = true,
    };
 
    var config = new Settings();
    var manager = new Manager(config);
 
    var app = manager.LaunchNewApplication(processStartInfo);
    var mainWindow = app.MainWindow;
 
    var barManager = mainWindow.Find.ByAutomationId("BarManager");
    Assert.IsNotNull(barManager);
}


The app displays a splash screen on startup, maybe that's why getting the main window fails? Whatever the reason, I didn't expect a NRE.

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Velin Koychev
Telerik team
answered on 20 Nov 2013, 01:46 PM
Hi Al,

One thing that I see that you miss is to start the manager  right before you launch the application. You just need to insert the following line of code:
manager.Start();
right before this line of code: var app = manager.LaunchNewApplication(processStartInfo);

I hope this helps.

Regards,
Velin Koychev
Telerik
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Al
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Velin Koychev
Telerik team
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