Xamarin.Forms UI Automation Testing WaitForElement WebView always times out

Question

My Xamarin.Forms app uses Azure AD B2C for authentication. It works great. I'm trying to build UI automation tests now and I ran into my first blocker. I have been trying to wait for the WebView to come on the screen so I can enter the email and password of a test user into my ui test automation script however the WaitForElement method always times out!

[Test]
public void RegistrationStarts()
{
    app.Screenshot("Welcome screen.");

    app.WaitForElement(c => c.WebView());
    app.Tap(c => c.WebView().Css("input#logonIdentifier"));
    app.EnterText("[email protected]");

}

I'm not sure why. I'm only testing in Android. I notice that the Azure AD B2C login web view appears to be inside my app. I can tell this because when I open the Android task switcher I can see Chrome and my app.

Answer 1

Is there a reason you used input before the id? If logonIdentifier is your ID of whatever you want to type, it should just be

app.Tap(c => c.WebView().Css("#logonIdentifier"));

Also, if logonIdentifier is the TextBox in which you want to type, enter text should be

_app.EnterText(c => c.WebView().Css("#logonIdentifier"), "[email protected]");

Answer 2

you can try wait for element with timeout - time in milisecond, second, and min.

app.WaitForElement(x => x.Marked("AutomationID"), timeout:TimeSpan.FromSeconds(90));

or

https://learn.microsoft.com/en-us/dotnet/api/xamarin.uitest.iapp.waitforelement?view=xamarin-uitest-sdk

Answer 3

It seems you are using systembrowser instead of WebView.

Change your method of acquiring token with WebView.

AuthenticationResult authResult = await _pca.AcquireTokenInteractive(B2CConstants.Scopes)
                .WithUseEmbeddedWebView(true)
                .ExecuteAsync();

https://github.com/microsoft/appcenter/issues/287#issuecomment-484151924