Attempt fixing #240

[qgustavor]

1. Fix .downloadId handling
2. Attempt adding a unit test for that
3. Realize mega-mock doesn't handle sharing yet and have to skip the test
4. Fix a warning in the tests by replacing shell: true with cross-spawn

[qgustavor]

@cyperdark Since I could not test this issue using unit testing, can you checking if this fix looks correct (and, if possible, test it)?

Edit: BTW, I don't mean I didn't test it, but I just tried it with a single test case, which may be prone and, since I wrote it, maybe I have skipped something. I'm human after all (and I don't trust AI to do that).

[cyperdark]

did a small script to compare links in account and on website

1. looks like decryption key is correct one
2. file id is different from account one
3. decryption key for a folder is different

Draw Skin 1.3.osk:
in account
--- https://mega.nz/file/3EYzGJYD#n10rKwpykh31pXZzsp8pNrYGTYp6Sp6uvmxMvBjHdAw
+++ https://mega.nz/file/eFBAAbBA#n10rKwpykh31pXZzsp8pNrYGTYp6Sp6uvmxMvBjHdAw

on website
--- https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA/file/eFBAAbBA
+++ https://mega.nz/file/eFBAAbBA#n10rKwpykh31pXZzsp8pNrYGTYp6Sp6uvmxMvBjHdAw


Draw Skin 1.3_ultra_lite.osk:
in account
--- https://mega.nz/file/KVYAjB7Z#oqLheFMBn08thwUF7tPSs9W9Ev-6u2dt8gY7hLUWHHY
+++ https://mega.nz/file/zVIADbzK#oqLheFMBn08thwUF7tPSs9W9Ev-6u2dt8gY7hLUWHHY

on website
--- https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA/file/zVIADbzK
+++ https://mega.nz/file/zVIADbzK#oqLheFMBn08thwUF7tPSs9W9Ev-6u2dt8gY7hLUWHHY


Draw Skin 1.3_extra.zip:
in account
--- https://mega.nz/file/LJw0gYDC#O7nKMQamR14ca3JSaS2k6EXtYDi04xtB3xk8-TdFu-Q
+++ https://mega.nz/file/mBIilB7S#O7nKMQamR14ca3JSaS2k6EXtYDi04xtB3xk8-TdFu-Q

on website
--- https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA/file/mBIilB7S
+++ https://mega.nz/file/mBIilB7S#O7nKMQamR14ca3JSaS2k6EXtYDi04xtB3xk8-TdFu-Q


folder url
--- https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA
+++ https://mega.nz/folder/jQAQkCba#0U0BKQQFqJMm0tcNztFopg

import { File } from 'megajs';


const links_in_account: any = {
  'Draw Skin 1.3.osk': 'https://mega.nz/file/3EYzGJYD#n10rKwpykh31pXZzsp8pNrYGTYp6Sp6uvmxMvBjHdAw',
  'Draw Skin 1.3_ultra_lite.osk': 'https://mega.nz/file/KVYAjB7Z#oqLheFMBn08thwUF7tPSs9W9Ev-6u2dt8gY7hLUWHHY',
  'Draw Skin 1.3_extra.zip': 'https://mega.nz/file/LJw0gYDC#O7nKMQamR14ca3JSaS2k6EXtYDi04xtB3xk8-TdFu-Q',
};

const links_on_website: any = {
  'Draw Skin 1.3.osk': 'https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA/file/eFBAAbBA',
  'Draw Skin 1.3_ultra_lite.osk': 'https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA/file/zVIADbzK',
  'Draw Skin 1.3_extra.zip': 'https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA/file/mBIilB7S',
};


async function parse_mega(url: string) {
  try {
    const folder = await File.fromURL(url).loadAttributes();


    const array = folder.children || [];
    console.log('```diff');

    for (let i = 0; i < array.length; i++) {
      const file = array[i];
      console.log(`${file.name}:`);
      console.log('in account');

      console.log('---', links_in_account[file.name!]);
      console.log('+++', await file.link({ key: file.key! }));
      console.log('');

      console.log('on website');

      console.log('---', links_on_website[file.name!]);
      console.log('+++', await file.link({ key: file.key! }));
      console.log('\n');
    };


    console.log('folder url');

    console.log('---', url);
    console.log('+++', await folder.link({ key: folder.key! }));

    console.log('```');
  } catch (error) {
    console.log('mega', error);
  };
};


parse_mega('https://mega.nz/folder/jQAQkCba#PdM_L91G4PVLCUx4fPWVrA');

edit: used local build with pr changes

[qgustavor]

I guess I have to fix that and implement sharing on mega-mock so we can unit test that.