interface orientation errors on all local snapshot tests

[jrames]

I'm testing out Local Snapshot Generation. I was able to get it working in a simple repo, but in my primary application all of the generated tests fail with the following:

failed - Error Error Domain=UISceneErrorDomain Code=101 "The current windowing mode does not allow for programmatic changes to interface orientation." UserInfo={NSLocalizedDescription=The current windowing mode does not allow for programmatic changes to interface orientation.}

I tried drastically simplifying things by returning a single very simple Preview via snapshotPreviews() and still hit this. It must be related to my project config in some way but I'm not sure. I'm also running on a sim and have tried a few different ones. Any ideas / suggestions would be appreciated.

[noahsmartin]

Hey @jrames There are a couple things I can think of here. First, are any of your previews directly setting the orientation with previewOrientation(...) If not it would default to portrait and should never attempt to change orientation assuming your simulator is already in portrait. If this is the case, can you try adding a breakpoint in UIKitRenderingStrategy around line 47 and see what the difference is between targetOrientation and windowScene.interfaceOrientation?

Also, are you running on an iPad? If so the app needs to have "UIRequiresFullScreen" set to true in Info.plist in order to programmatically rotate. If you run it on an iPhone it shouldn't have this issue.

Also can you check if you are overriding this method? https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1623107-application

[iltercengiz]

I'm having the same problem. I don't have any preview interface orientation modifiers on the previews, I even tried adding one but it's the same.

Based on my initial investigation, it looks like snapshot previews assumes tests will run with a host app in place. I'm currently trying this in a Swift package where my product is a Swift library. I'm actively looking for ways to get this to work but I'd love if this is something known and if there's a way forward.

[jrames]

Apologies for the delay!

We did get this resolved, though to be honest I don't recall the root cause exactly. I believe in the initial attempt, I was attempting this with an SPM package test target. In the current implementation, I have it pointing to an Xcode test target created for snapshot tests. That seems to work, and I didn't have to change anything else to resolve the orientation error.