const testEncode = (to: 'toHex' | 'toString' | 'toU8a', expected: string | Uint8Array): void =>
      it(`can encode ${to}`, (): void => {
        const a = registry.createType('EthereumLookupSource', '0x4119b2e6c3Cb618F4f0B93ac77f9BeeC7FF02887');

        expect(a[to]()).toEqual(expected);