desc: Test that UUIDs work
tests:
  - cd: r.uuid()
    ot: uuid()
  - cd: r.expr(r.uuid())
    ot: uuid()
  - cd: r.type_of(r.uuid())
    ot: 'STRING'
  - cd: r.uuid().ne(r.uuid())
    ot: true
  - cd: r.uuid('magic')
    ot: ('97dd10a5-4fc4-554f-86c5-0d2c2e3d5330')
  - cd: r.uuid('magic').eq(r.uuid('magic'))
    ot: true
  - cd: r.uuid('magic').ne(r.uuid('beans'))
    ot: true
  - py: r.expr([1,2,3,4,5,6,7,8,9,10]).map(lambda u:r.uuid()).distinct().count()
    js: r([1,2,3,4,5,6,7,8,9,10]).map(function(u) {return r.uuid();}).distinct().count()
    rb: r.expr([1,2,3,4,5,6,7,8,9,10]).map {|u| r.uuid()}.distinct().count()
    ot: 10
