Function assert

examples/acceptance/ohlc-sample.ts:10–12

(condition: unknown, message: string)

// and handles edge cases properly for both tuple and object input formats.

const assert = (condition: unknown, message: string): void => {
  if (!condition) throw new Error(message);
};

const assertEqual = <T>(label: string, actual: T, expected: T): void => {
  assert(