

test(function () {
  assert_equals(getComputedValueFor('invalid_digits_calc_10_minus_3'), 'none');
}, 'Computed value for `text-combine-upright: digits calc(10 - 3)` is `none`');

test(function () {
  assert_equals(getComputedValueFor('invalid_digits_calc_3_times_1_0'), 'none');
}, 'Computed value for `text-combine-upright: digits calc(3 * 1.0)` is `none`');

test(function () {
  assert_equals(getComputedValueFor('invalid_digits_calc_2_0_times_2'), 'none');
}, 'Computed value for `text-combine-upright: di