Election: add unit tests for core algorithm

[baumanj]

Exhaustive testing using end-to-end or integration tests is time and resource intensive. However, the core elections algorithm is contained in just a handful of functions:

• start_election
• instert_election
• restart_elections
• merge

Creating testable, purely functional interfaces (as with elections_to_restart_impl) can allow for the creation of efficient tests of a wide variety of scenarios to help validate the algorithm in a variety of scenarios that are hard to achieve with other types of testing.

[stale]

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. We value your input and contribution. Please leave a comment if this issue still affects you.