describe('conversion tests', (): void => {
    TESTS.forEach(([isLe, isNegative, numarr, strval], i): void => {
      it(`#${i}: creates ${strval} (bitLength=${numarr.length * 8}, isLe=${isLe}, isNegative=${isNegative})`, (): void => {
        expect(
          u8aToBigInt(