> - Using an IDE is not cheating.
> - Using StackOverflow is not cheating.
> - Reading the documentation is not cheating.
That's not how any form of testing works.
The person taking the test doesn't get to determine the parameters of the test. Imagine a college student pulling out their cellular phone and looking up Wikipedia during their final because "Wikipedia is not cheating"
The test is also supposed to be administered to everyone on equal footing. If some candidates are substituting their own definition of cheating then they're putting everyone else at a disadvantage.
It doesn't matter what you expect or how you would interview someone. When you participate in someone else's interview, you play by their rules. You don't substitute your own.