Yeah we have that at uni right now... they are cross checking the exams for plagiarism
10 pdf open and the faster ctrl+c, ctrl+f, ctrl+v you ever seen
I had a teacher in college last year that swung the other way. She encouraged you to use any resource you could. Internet, textbooks, etc. You had additional time to take the test as well. instead of 1 hour she gave you 2. She made the questions harder to compensate, meaning they weren't simple yes/no/ or google-able questions. If you got less than 80% correct, you get a 0 for the test. Those were the most stressful tests I've ever taken in my life. Her reasoning was that in the workplace you have all resources available to solve your problems, but you need to be accurate in doing so. I get it. But the fear of the 0 if you don't get an 80 on your final exam (thereby failing the course, since the final was weighted high enough that a 0 would fail you) was brutal.
The best tests I ever took were open book. Not because they were easy but that they pushed my understanding.
Funny thing is this year I made an exam with half of the class doing in in class, the other half online with twice the time. Then an other one with the group switched. In each case the students in class with a shorter time did better than online... They suck so much that they even suck at cheating...