I'm trying to "slide in" a file through the upload mechanism without actually uploading it.
I think I got it all figured out so far, but now I try to use the wp_handle_upload function. I override the "test_upload" check to avoid that the function blocks my file because it was NOT uploaded.
That works up to the point where the function uses "move_uploaded_file" to move the file.
I would expect the function to use "normal move" when overriding "test_upload".