mengw15 opened a new issue, #6374:
URL: https://github.com/apache/texera/issues/6374
### Task Summary
`agent-service/src/agent/tools/workflow-execution-tools.ts` (codecov ~7.5% —
the service's single biggest gap, ~484 uncovered lines) has
`executeOperatorAndFormat(...)`: it validates a logical plan, runs it via
`executeWorkflowHttp`, and formats the target operator's result. Unit-testable
with `bun test` by mocking the HTTP call (`executeWorkflowHttp` / the
`execution-api` module) to return canned `SyncExecutionResult`s — no live
backend; `getBackendConfig` and the workflow mutex can be stubbed.
### Behavior to cover
- empty `logicalPlan.operators` -> `createErrorResult("Cannot execute:
workflow has no operators.")`
- pre-exec validation fails with target-operator errors -> error listing them
- `executeWorkflowHttp` returns `result.success === false` -> error with the
returned error text
- target operator info missing from the result -> error
- target `opInfo.error` present -> error via `formatExecutionError`
- `opInfo.result` missing / not an array -> `"(no result data)"`
- result string exceeds the char limit -> truncated output
- success path -> formatted operator result; `options.onResult` callback
invoked when provided
### Task Type
- [ ] Refactor / Cleanup
- [ ] DevOps / Deployment / CI
- [x] Testing / QA
- [ ] Documentation
- [ ] Performance
- [ ] Other
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