test0: false
test0: false
test1: 1
test1: false
test2: 1
test2: false
test3: -10
test3: -10
test4: -10
test4: -10
test5: 1
test5: null
test6: 0.1
test6: undefined
test7: 0
test7: 0
test8: undefined
test8: undefined