Such that with `--tpdb` passed (sub)actors will engage the `pdbp` REPL
automatically and so that we can use the new `stackscope` support when
complex cases hang Bo
Also,
- simplified some type-annots (ns paths),
- doc-ed an inter-peer test func with some ascii msg flows,
- added a bottom #TODO for replicating the scenario i hit in `modden`
where a separate client actor-tree was hanging on cancelling a `bigd`
sub-workspace..
Drop all the nested `@acm` blocks and defunct comments from initial
validations. Add some todos for cases that are still unclear such as
whether the caller / streamer should have `.cancelled_caught == True` in
it's teardown.
Tests that appropriate `Context` exit state, the relay of
a `ContextCancelled` error and its `.canceller: tuple[str, str]` value
are set when an inter-peer cancellation happens via an "out of band"
request method (in this case using `Portal.cancel_actor()` and that
cancellation is propagated "horizontally" to other peers. Verify that
any such cancellation scenario which also experiences an "error during
`ContextCancelled` handling" DOES NOT result in that further error being
suppressed and that the user's exception bubbles out of the
`Context.open_context()` block(s) appropriately!
Likely more tests to come as well as some factoring of the teardown
state checks where possible.
Pertains to serious testing the major work landing in #357
Move over relevant test from the "context semantics" test module which
was already verifying peer-caused-`ContextCancelled.canceller: tuple`
error info and propagation during an inter-peer cancellation scenario.
Also begin a more general set of inter-peer cancellation tests starting
with the simplest case where when a peer is cancelled the parent should
NOT get an "muted" `trio.Cancelled` and instead
a `tractor.ContextCancelled` with a `.canceller: tuple` which points to
the sibling actor which requested the peer cancel.
Tyler Goodlet