Function oracle

test/big-decimal/utils.test.ts:99–99

(n: bigint)

  test('exact digit count across every power-of-ten boundary and the 2^53 seam', () => {
    const oracle = (n: bigint) => (n < 0n ? -n : n).toString(10).length;
    for (let k = 0n; k <= 30n; k++) {
      const p = 10n ** k;
      for (let d = -2n; d <= 2n; d++) {