@include test('cmp(..)') {
  $tests: (
    '==': false,
    '===': false,
    '>': true,
    '>=': true,
    '!=': true,
    '!==': true,
    '<': false,
    '<=': false,
  );

  @each $test, $expect in $tests {
    @include assert-equal(cmp('1.2.3', $test, '0.1.2'), $expect, 'Compare both versions.');
  }
}