Merge pull request 'fix: do not claim update reading or applying QTS cannot do' (#2) from fix/no-update-reader into main

QTS has no apt, dnf or opkg, so the update readers inherited from
LinuxDriver find no package manager, and QPKG updates are not implemented.
get_available_updates, refresh_available_updates and apply_updates are None,
the same opt-out as manage_service: netOrk's patch groups and compliance
report include a driver only when these are callable.

napalm_qnap_qts/qnap_qts.py

@@ -73,6 +73,11 @@ class QnapQtsDriver(StorageDriver, HypervisorDriver, LinuxDriver):
     #: makes every "can it control services?" check -- is ``manage_service``
     #: callable -- answer no, rather than offering buttons that cannot work.
     manage_service = None  # type: ignore[assignment]
+    #: The same for updates: QTS has no apt, dnf or opkg, and QPKG updates are
+    #: not implemented. netOrk leaves a driver without them out of patching.
+    get_available_updates = None  # type: ignore[assignment]
+    refresh_available_updates = None  # type: ignore[assignment]
+    apply_updates = None  # type: ignore[assignment]
 
     SNMP_OBJECT_ID_PREFIX = QNAP_ENTERPRISE_OID
     SNMP_FINGERPRINT = [

tests/test_qnap_qts.py

@@ -192,3 +192,13 @@ def test_services_cannot_be_controlled():
 
     assert callable(getattr(LinuxDriver, "manage_service", None))
     assert not callable(getattr(QnapQtsDriver, "manage_service", None))
+
+
+
+def test_updates_are_not_read_or_applied_here():
+    """QTS has no apt, dnf or opkg: the readers inherited from LinuxDriver find no
+    package manager, and QPKG updates are not implemented. Saying so keeps QNAP out
+    of netOrk's patch groups and compliance report, which ask whether these
+    methods are callable."""
+    for method in ("get_available_updates", "refresh_available_updates", "apply_updates"):
+        assert not callable(getattr(QnapQtsDriver, method, None)), method