XrayEyeAlign.gui is a property delegating to lamni.xeyegui and has no setter. Mock lamni.xeyegui in the update_frame tests; drop the redundant alignment_images reset, which __init__ already handles.
XrayEyeAlign.gui is a property delegating to lamni.xeyegui and has no setter. Mock lamni.xeyegui in the update_frame tests; drop the redundant alignment_images reset, which __init__ already handles.