it('creates a keccak hash', (): void => {
    expect(
      hasher('keccak', 'abc')
    ).toEqual(
      new Uint8Array([78, 3, 101, 122, 234, 69, 169, 79, 199, 212, 123, 168, 38, 200, 214, 103, 192, 209, 230, 227, 58, 100, 160, 54, 236, 68, 245, 143, 161, 45, 108, 69])