## STACK TEST
# entry depth 1
1
-> stack size should be 1

# entry depth 2
2 3
-> stack size should be 3
-> stack should be 1, 2, 3

# drop
drop
-> stack size should be 2

# drop2
drop2
-> stack size should be 0

# drop error
drop
-> error should be 2

# drop2 error
drop2
-> error should be 2

# drop2 error
1 drop2
-> error should be 2
drop

# test dup
1 dup
-> stack size should be 2
-> stack should be 1, 1

# test dup2
drop 2 dup2
-> stack size should be 4
-> stack should be 1, 2, 1, 2
drop2 drop2

# test rot
1 2 3 rot
-> stack size should be 3
-> stack should be 2, 3 ,1

# test depth
depth
-> stack size should be 4
-> stack should be 3, 2, 3 ,1
drop2 drop2

# test pick
1 2 3 4 2 pick
-> stack size should be 5
-> stack should be 2, 1, 2, 3, 4

# test erase
erase
-> stack size should be 0