[PR] test: widen HandshakeRetrySpec buffered-message timeout [pekko]

["He-Pin (via GitHub)" <gi...@apache.org>]

He-Pin opened a new pull request, #3012:
URL: https://github.com/apache/pekko/pull/3012

   ## Motivation
   
   `HandshakeRetrySpec` *"be retried during handshake-timeout (no message loss)"* is intermittently flaky in CI, timing out at `expectMsg` while waiting for `"hello"` (#560, #634, #276).
   
   The first message is sent **before** `systemB` exists, so it is buffered while the outbound handshake is retried, and is only delivered once the handshake completes. With `handshake-timeout = 10s`, delivery can legitimately take longer than the default expect timeout (`single-expect-default`, ~6s under `timefactor = 2` in CI), so the assertion fires before the message arrives — even though no message is actually lost.
   
   ## Modification
   
   Wait for the buffered `"hello"` with an explicit `15s` timeout (dilated by `pekko.test.timefactor`), comfortably above the `10s` `handshake-timeout`.
   
   ## Result
   
   The test no longer races the handshake window under CI load; it still passes locally.
   
   ```
   [info] HandshakeRetrySpec:
   [info] - must be retried during handshake-timeout (no message loss) (1 second, 241 milliseconds)
   [info] All tests passed.
   ```
   
   ## Tests
   
   `remote/testOnly org.apache.pekko.remote.artery.HandshakeRetrySpec` — passes. `scalafmt` run on the changed file. Test-only change.
   
   ## References
   
   Fixes #560
   Fixes #634
   Fixes #276


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Re: [PR] test: widen HandshakeRetrySpec buffered-message timeout [pekko]

["He-Pin (via GitHub)" <gi...@apache.org>]

He-Pin merged PR #3012:
URL: https://github.com/apache/pekko/pull/3012


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