[14_11] Add a unit test for get_completions() in TestDatabaseBasicFunction

[rachelxhoot]

The tests cover some scenarios to ensure the completions feature works as expected, including:

• Completions for multiple full matches ("abcd": "abcd", "abcd5678")
• Completions for a partial match starting with a specific prefix

[da-liii]

Here is the guide on how to format your code: https://github.com/XmacsLabs/mogan/blob/branch-1.2/docs/guide/Format.md

[rachelxhoot]

Here is the guide on how to format your code: https://github.com/XmacsLabs/mogan/blob/branch-1.2/docs/guide/Format.md

Thank you!! I will refer to it to modify my code.

[da-liii]

Thanks for creating the first pull request, and now you have meet the 1 of the two baselines of a OSPP candidates.

And now, you may learn how to create a pull request to add scheme tests.

[rachelxhoot]

Thanks for creating the first pull request, and now you have meet the 1 of the two baselines of a OSPP candidates.

And now, you may learn how to create a pull request to add scheme tests.

Thanks for your patient guidance on my first GitHub PR 🥹, and I'm excited to explore more about Mogan!