[TEST] Network simulator and some initial tests

[panleone]

Abstract

The aim of this PR is improving the unit test coverage by adding a mock to the network class.

How to use it in unit tests:

1. Mock the file vi.mock('../../../scripts/network.js')
2. Create a bunch of wallets with the functions setUpLegacyMainnetWallet(). Those wallets have a non-zero balance and are synced.
3. After creating txs with any wallet call getNetwork().sendTransaction(txHex)
4. Once enough txs are added mint a new block with getNetwork().mintBlock()
5. Trigger download of the block for all wallets in the test by calling the global.js function refreshChainData();

Notice that calling refreshChainData() will emit a signal that is received by wallets as

 getEventEmitter().on('new-block', async (block) => {
            if (this.#isSynced) {
                await this.getLatestBlocks(block);
                getEventEmitter().emit('new-tx');
            }
        });

which makes tests reliable, in the sense that the normal sync flow is followed, with the only difference that instead of blockbook, blocks are provided by the mock class.

I have also added a couple of tests:

• Create a bunch of txs between a HD and a Legacy wallets and verify that txs are received and balance is updated as expected
• Verify that HD wallets are aware of at least MAX_ACCOUNT_GAP addresses after the last used

---

Testing

Tests working as expected

[netlify]

✅ Deploy Preview for cheery-moxie-4f1121 ready!

Name	Link
🔨 Latest commit	899e48a
🔍 Latest deploy log	https://app.netlify.com/sites/cheery-moxie-4f1121/deploys/6634fdea0566e10008c86b8b
😎 Deploy Preview	https://deploy-preview-364--cheery-moxie-4f1121.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[panleone]

new tests will fail until #363 is merged (which will solve the sync bug)

[Duddino]

These looks good, my only nit is that these are no longer unit tests, so just move them in a different folder

[panleone]

These looks good, my only nit is that these are no longer unit tests, so just move them in a different folder

done

[Duddino]

ACK nice tests

[JSKitty]

tACK 899e48a