Unit test: Blocky

[metal-pony]

Description

Create unit tests for Blocky, assuming it's brought over from https://github.com/sparklicorn/bucket as-is or with similar functionality.

Objectives

• Create unit tests

[metal-pony]

Most of the methods worth testing are currently protected.
#36 would change them to public, allowing them to be tested easier.

❗Blocking this by #36

❗This will rollover 2023-09-10 -> 2023-09-24

❗Updating priority Low -> Medium, due to defect with clearing lines and updating the gravity timer, preventing the game from being played. See #33