aglinxinyuan opened a new issue, #4739:
URL: https://github.com/apache/texera/issues/4739
### Task Summary
`WorkerStateManager`
(`amber/src/main/scala/org/apache/texera/amber/engine/common/statetransition/WorkerStateManager.scala`)
wires the worker-side state-transition graph but currently has no dedicated
unit tests. Add `WorkerStateManagerSpec` covering the graph contract:
- Default initial state is UNINITIALIZED; explicit initial state is honored
- Allowed: UNINITIALIZED → READY, READY → {RUNNING, PAUSED, COMPLETED},
RUNNING → {PAUSED, COMPLETED}, PAUSED → RUNNING
- COMPLETED is terminal: rejects forward transitions; self-transition is a
no-op
- TERMINATED is absent from the graph and rejected from any state
- PAUSED → COMPLETED is rejected (only RUNNING → COMPLETED is permitted)
### Priority
P3 – Low
### Task Type
- [x] Testing / QA
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