Set and Get tests

[ayo-ajayi]

Wrote a test file to address the issues listed in issue #69 and #71

1. covers the correctness of single command
2. covers the correctness when multiple commands are fired
3. no commands are dropped abruptly
4. ensure we check for small, large, and massive inputs

[arpitbbhayani]

@JyotinderSingh what do you think about this?

[JyotinderSingh]

@JyotinderSingh what do you think about this?

LGTM.

nit: I prefer to use the assert library for checks for consistency, but the PR is quite old so we can do that separately.