Tobias Grieger dad8208a4d raft: avoid panics during *node tests ...

`StartNode` runs a naked goroutine, so it's impossible to test against
it in a way that will reliably produce contained test failures when
assertions are hit on the `(*node).run` goroutine.

This commit introduces a harness that we can use in tests to wrap
this goroutine and allow it to defer errors to `*testing.T`.

Note that tests of `Node` still need to be architected carefully
since it's easy to produce a deadlock in them should things not
go exactly as planned.

Signed-off-by: Tobias Grieger <tobias.b.grieger@gmail.com>

2022-09-20 08:59:37 +02:00

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