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Auto: s7-c5 — pre-flight PUT/GET enablement test

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Closes #298
This commit is contained in:
Joseph Doherty
2026-04-26 01:31:48 -04:00
parent 4bc8aa2478
commit 64a11ef285
9 changed files with 625 additions and 3 deletions
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12
docs/drivers/S7-Test-Fixture.md
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@@ -113,6 +113,18 @@ arrays of structs — not covered.
lab rig but not CI.
3. **Real S7 lab rig** — cheapest physical PLC (CPU 1212C) on a dedicated
network port, wired via self-hosted runner.
4. **PR-S7-C5 — PUT/GET-disabled pre-flight rejection.** Snap7 does *not*
model the hardened-CPU PUT/GET response (it accepts every read once the
COTP handshake completes), so the **failure** path of the pre-flight
probe — `S7PutGetDisabledException` thrown from `InitializeAsync` when
the PLC rejects the probe read with `ErrorCode.WrongCPU_Type` /
`ErrorCode.ReadData` — needs a real S7-1500 with PUT/GET disabled in TIA
Portal. The integration suite covers the *happy* path
(`Driver_preflight_passes_when_probe_address_seeded`); the failure path
should be added as a `--with-real-plc` opt-in test that the self-hosted
runner with the lab rig executes. The classifier branch
(`S7PreflightClassifier.IsPutGetDisabled`) is unit-tested without a
network in `S7PreflightTests.Classifier_matches_only_PUT_GET_disabled_error_codes`.
Without any of these, S7 driver correctness against real hardware is trusted
from field deployments, not from the test suite.