* refactor(heart): extract logic into heartbeatTimer fn
To make it easier to test, I extract heartbeatTimer into it's own
function.
* feat(testing): add tests for heart.ts
* fixup
* fixup!: remove unneeded heart call
* Update src/node/heart.ts
Co-authored-by: Asher <ash@coder.com>
* fixup!: use mockResolvedValue everywhere
* fixup!: add stat test for timestamp check
Co-authored-by: Asher <ash@coder.com>
