3.6.12. test - minimal test command like in /bin/sh¶

3.6.12.1. Usage¶

test [EXPR]

Options:
!, =, !=, -eq, -ne, -ge, -gt, -le, -lt, -o, -a, -z, -n, -d, -e,
-f, -L; see 'man test' on your PC for more information.