print_horizontal_rule.sh

#!/usr/bin/env bats

load 'test_helper/bats-support/load'
load 'test_helper/bats-assert/load'

print_horizontal_rule () {
  let width="$(tput cols)"
  # echo -n '─' | hexdump -C
  printf -v dash "%b" "\xe2\x94\x80" && printf "%*s\n" "$width" | sed "s/ /${dash}/g"
}

# test
@test "header format uses a native line-drawing character" {
  run printf "%s" "$(print_horizontal_rule)"
  assert_line --index 0 --partial "─────"
}