Version: 0.1.00.2.00.2.10.2.20.2.30.2.40.2.50.2.60.2.70.2.80.2.90.2.110.2.120.2.130.2.140.2.150.2.200.2.210.2.220.2.230.3.20.4.00.4.10.4.20.4.30.4.40.4.51.0.01.0.11.0.21.1.11.1.21.2.01.2.11.3.01.3.11.4.0
test_sgn = ->
run_test [
"sgn(-3)",
"-1",
"sgn(0)",
"0",
"sgn(3)",
"1",
]