it('converts known bytes to their correct values (upper/lower)', (): void => {
    expect(
      hexToU8a('0x68656C6c6f20776F726c64') // hello world (11 bytes, non-aligned)
    ).toEqual(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64]));
  });