Fix app crash trying to show the search results page

[AndrewKeepCoding]

Description

Set the placeholder image "Placeholder.png" in case that ControlInfoDataPath item's ImagePath is null.

Motivation and Context

Fixes #1438.

How Has This Been Tested?

Tested on the updated app.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[karkarl]

Thanks so much for the fix! We should definitely add a test to avoid future regressions, do you mind appending that to this PR?

[AndrewKeepCoding]

Thanks so much for the fix! We should definitely add a test to avoid future regressions, do you mind appending that to this PR?

Good point!
But I'm having issues trying to run the UI Tests. I followed the instructions but I'm getting the exceptions below:

All NuGet packages are installed. I also updated them but got the same exception...

I need to find time to take a look at this later. Any tips?

[marcelwgn]

Hi @AndrewKeepCoding thank you for creating this PR! Can you try running the WinUI Gallery Packaged workload from Visual Studio and then see if the testsw are able to pick up the application?

If that does not help, can you try running the following command Get-AppxPackage and show the packages that have WinUI3ControlsGallery in the name?

[AndrewKeepCoding]

@marcelwgn Thanks for the tips. It worked but not sure if it was the WinAppDriver version (v1.2.99 -> v1.2.1) or the "alternatives" on the instructions...🙃

@karkarl I added an UI test that shows the results page and click each group result menu item. Let me know if can improve it since this is my first time writing a test with WinAppDriver.🙃

[karkarl]

@karkarl I added an UI test that shows the results page and click each group result menu item. Let me know if can improve it since this is my first time writing a test with WinAppDriver.🙃

Thanks so much for your help! I've added some suggestions to your PR, can't wait to get this in!

[AndrewKeepCoding]

@karkarl Thanks for the tips. Updated the test.

[karkarl]

/azp run