feat: add unit test

[jimenezz22]

Closes #13

@ElliotFriend

Unit tests added for horizonQueries.js:

fetchAccount.test.js

• Verifies that, given a valid publicKey, the function returns the account details.
• Test with an invalid publicKey that should throw an error with the message "invalid public key".
• Simulate an unfunded account (status 404) and throw an appropriate error.

fetchAccountBalances.test.js

• Verifies that given a valid publicKey, the function returns an array of balances.

fetchRecentPayments.test.js

• Verifies that the function returns an array of recent payments for a valid account.

fundWithFriendbot.test.js

• Verifies that the function correctly calls the friendbot service on the testnet to fund the account.

startTransaction.test.js

• Verifies that a transaction is correctly initialized.

submit.test.js

• Verifies that a transaction is successfully submitted.

findStrictSendPaths.test.js

• Verifies that the function returns valid payment paths.

findStrictReceivePaths.test.js

• Verifies that the function returns valid payment paths.

Al tests passed successfully:

[ElliotFriend]

Hi, there @jimenezz22!

This looks pretty great! As I've mentioned I'm not too familiar with setting up unit tests, but it looks like the tests you've written are looking at the right things for the horizon queries.

Looks like you're still planning to work on the other files, but let me know if there's anything else you need. Thanks!

Edit: We've also merged in #23, which updates a lot of package versions, so you'll need to bring in those changes to your branch so there aren't any conflicts.

[ElliotFriend]

Hey, there! Thanks for the work on this! Looks like there are a couple regressions from the previously updated packages to take care of, and some changes to incorporate the newer usage patterns of @stellar/stellar-sdk.

Let me know if you have any questions about the comments I left. Thanks!

[jimenezz22]

@ElliotFriend I will review the comments and make the requested changes 🫡

[jimenezz22]

@ElliotFriend All changes for versions applied, some tests doesn't works after the version change, I will focus on solving this 🫡

[jimenezz22]

gm @ElliotFriend
All unit tests pass according to previously requested version changes

[ElliotFriend]

Hi, @jimenezz22! Thanks again for the work on these tests!

One small JSDoc change, I've requested. Other than that, everything is looking good! Excited to get this merged!

[ElliotFriend]

Looks great! Thanks for all the hard work!