Write Updated test for StatefulSet Replica scaling to include Patch Scale +1 endpoint

[riaankleinhans]

Progress [3/6]

• APISnoop org-flow : AppStatefulsetsMocktest
• test approval issue : kubernetes/kubernetes#
• test pr : kuberenetes/kubernetes #98126
• two weeks soak start date : testgrid-link
• two weeks soak end date :
• test promotion pr : kubernetes/kubernetes#?

Identifying an untested feature Using APISnoop

According to this APIsnoop query, there are still some remaining StatefulsetScale endpoints that are untested.

with this query, you can filter untested endpoints by their category and eligibility for conformance. e.g below shows a query to find all conformance eligible untested, stable, apps endpoints

SELECT
  endpoint,
  -- k8s_action,
  -- path,
  -- description,
  kind
  FROM testing.untested_stable_endpoint
  where eligible is true
    and endpoint like '%StatefulSetScale%'
  --and category = 'core'
  order by kind, endpoint desc
  limit 25;

               endpoint                | kind
---------------------------------------|-------
 patchAppsV1NamespacedStatefulSetScale | Scale
(1 row)


# Verifying increase in coverage with APISnoop


```sql-mode
select distinct  endpoint, right(useragent,73) AS useragent
from testing.audit_event
-- where useragent ilike '%subresource%'
 where endpoint ilike '%AppsV1NamespacedStatefulSetScale%'
 and release_date::BIGINT > round(((EXTRACT(EPOCH FROM NOW()))::numeric)*1000,0) - 60000
and useragent like 'e2e%'
order by endpoint
limit 30;

                endpoint                 |                                 useragent
-----------------------------------------|---------------------------------------------------------------------------
 patchAppsV1NamespacedStatefulSetScale   |  [StatefulSetBasic] should have a working scale subresource [Conformance]
 readAppsV1NamespacedStatefulSetScale    |  [StatefulSetBasic] should have a working scale subresource [Conformance]
 replaceAppsV1NamespacedStatefulSetScale |  [StatefulSetBasic] should have a working scale subresource [Conformance]
(3 rows)

Final notes

If a test with these calls gets merged, test coverage will go up by 1 point

This test is also created with the goal of conformance promotion.

---

/sig testing

/sig architecture

/area conformance

[k8s-ci-robot]

@Riaankl: This issue is currently awaiting triage.

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