In my experience (New York State) they tend to side with the employee at the first level of appeal. If the employer contests that decision it goes before an administrative law judge, where anything can happen, though even there they tend to favor the employee in this blue state.
I quit a job once upon a time and secured unemployment. The employer attempted to retroactively impose random drug testing, I asked for an opt-out since it wasn't part of the conditions of employment when I was hired, they said no. I cited the applicable case law with HR, they still said no, so I quit. Won that one at both levels of appeal, found a new job three weeks later, started it two weeks after that, using the interim to take a nice vacation to Finland on the ex-employer's dime. I may have sent them an unsigned post card from Helsinki saying thanks for 50% of the salary for 0% of the work.....