%prep
  autoload -Uz is-at-least

%test

  versions=(
    1 1.1 1.1.1 1.2 1.2.1
    2 2.1 2.1.1 2.2 2.2.1
    3 3.1 3.1.1 3.2 3.2.1
  )
  for (( i = 1; i <= $#versions; ++i)); do
    for (( j = i+1; j <= $#versions; ++j)); do
      is-at-least $versions[i] $versions[j] || echo "$versions[i] ≰ $versions[j]"
      { ! is-at-least $versions[j] $versions[i] } || echo "$versions[j] ≤ $versions[i]"
    done
  done
0:is-at-least smoke test

# versions in v1 should be equal
# versions in v2 should be newer than those in v1
  v1=( 1 1.0 1.0.0 1.0.0.0 1-b 1.X-0 )
  v2=( 1.0.0.1 1.0.1 1.0.1.0 1.0.1.1 1-a-0-1 1-0-a.1)
  for (( i = 1; i < $#v1; ++i )); do
    for (( j = 1; j < $#v1; ++j )); do
      is-at-least $v1[i] $v1[j] || echo "$v1[i] ≰ $v1[j]"
    done
  done
  for (( i = 1; i < $#v1; ++i )); do
    for (( j = 1; j < $#v2; ++j )); do
      is-at-least $v1[i] $v2[j] || echo "$v1[i] ≰ $v2[j]"
      { ! is-at-least $v2[j] $v1[i] } || echo "$v2[j] ≤ $v1[i]"
    done
  done
0:trailing zeroes are filled in, text-only segments are ignored

  local min cur
  for min cur in 1.2 1.12   1.2b 1.12a   1-a3 1-b1; do
    is-at-least $min $cur || echo  "$min ≰ $cur"
  done
0:numerical or lexical order

%clean