Function precisionReport

test/big-decimal/precision-comparison.test.ts:72–86

* Run a precision comparison and return a summary string for snapshot testing. * * `ourFn` computes the BigDecimal result at the given precision. * `refFn` computes the reference result (decimal.js or exact) at the given precision.

(
  label: string,
  precisions: number[],
  ourFn: (prec: number) => string,
  refFn: (prec: number) => string
)

 * `refFn` computes the reference result (decimal.js or exact) at the given precision.
 */
function precisionReport(
  label: string,
  precisions: number[],
  ourFn: (prec: number) => string,
  refFn: (prec: number) => string
): string {
  const lines: string[] = [label];
  for (const prec of precisions) {
    const ours = ourFn(prec);
    const ref = refFn(prec);
    const digits = matchingDigits(ours, ref);
    lines.push(`  prec=${prec}: ${digits} matching digits (of ${prec})`);
  }
  return lines.join('\n');
}

// ---------- Tests ----------