It’s easy to take for granted all of the testing that happens behind closed doors before a smartphone or any other consumers electronics gadget makes its way into our hands. We gave readers an inside look back in 2011 at some of the labs and equipment that Sprint uses when testing devices for its network, and now CNET has posted a similar feature on some of the facilities and equipment Samsung uses to test everything from phones and tablets to refrigerators and washing machines. CNET’s Shara Tibken watched along as Samsung engineers zapped cell phones with stun guns, dropped tablets off of shelves, drenched phones with water, shook washing machines around to simulate a bumpy ride on a delivery truck and even used a room full of ovens to… bake cookies. The site also provided a bunch of photos of various test equipment from its tour in the post, which is linked below in our source section.