. "$BST_LIB"
require usleep usleep/present

# /bin/usleep must be the standalone meta-oe utility (update-alternatives priority
# 80), not the busybox applet at 50 — the busybox applet takes a bare count and
# knows none of the popt long options asserted below.
check_out usleep/version "usleep version 1.2" usleep --version

# popt option dispatch: --oot is a standalone-only flag, and POPT_AUTOHELP builds
# --help from the option table plus poptSetOtherOptionHelp's "[microseconds]".
check_out usleep/oot  "oot says hey"   usleep --oot
check_out usleep/help "[microseconds]" usleep --help

# no argument -> count defaults to 1 us; a plain count sleeps and exits 0.
check usleep/default usleep
check usleep/count   usleep 200000

# two arguments is the documented usage error (rc 2), which also proves poptGetArg
# walked the residual argv rather than the option table.
check_rc usleep/two-args 2 usleep 1 2

# The clock must actually advance: 3 x 999999 us ~ 3.0 s, so a second-granularity
# sample reads >= 2 even with truncation at both ends. Each count stays under 1e6,
# where usleep(3) is defined. This is what separates a real sleep from a no-op.
t0=$(date +%s)
usleep 999999; usleep 999999; usleep 999999
t1=$(date +%s)
el=$((t1 - t0))
if [ "$el" -ge 2 ]; then bst_ok usleep/elapsed
else bst_notok usleep/elapsed "3 x 999999us advanced the clock only ${el}s"; fi