Does that Boeing test rig include freezing the airframe to minus 60 and baking it to plus 50 a few times a day?
No, the entire structure resides outdoors at Everett, so operates within the normal meteorological conditions for that location. I don't know for sure, but I think there are a number of small cold-soak and/or baking chambers where examples of critical structure are cycled.
I will check around.