NO-JIRA: fix flaky test TestNodeTopologyCR_DeleteNode

[mdbooth]

Backports an exiting upstream fix for a flake we're seeing frequently in unit runs.

Summary by CodeRabbit

• Tests
  • Improved test reliability for node topology handling by waiting for reconciliation to finish before proceeding.
  • Added a check to ensure the expected default subnet is present before node add/delete scenarios run, reducing flaky test behavior.

[openshift-ci-robot]

@mdbooth: This pull request explicitly references no jira issue.

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In response to this:

Backports an exiting upstream fix for a flake we're seeing frequently in unit runs.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository: openshift/coderabbit/.coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 3b6f345e-ccf1-438a-a9b3-124e9104cd42

📥 Commits

Reviewing files that changed from the base of the PR and between 1a542ec and c45b018.

📒 Files selected for processing (1)

• pkg/controller/nodeipam/ipam/cloud_cidr_allocator_test.go

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Walkthrough

A test in the node IPAM allocator suite was updated to wait for the default node/topology reconciliation before proceeding, adding a poll-based check that the NodeTopology CR contains the default subnet prior to test node creation.

Changes

Test synchronization fix

Layer / File(s)	Summary
Add wait for default subnet before node deletion test pkg/controller/nodeipam/ipam/cloud_cidr_allocator_test.go	Adds a wait.PollImmediate block to TestNodeTopologyCR_DeleteNode that waits for verifySubnetsInCR to confirm subnet-def presence before adding the test node, to avoid a race condition.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 15

✅ Passed checks (15 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: fixing the flaky TestNodeTopologyCR_DeleteNode test.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Stable And Deterministic Test Names	✅ Passed	The PR only adds synchronization logic; it introduces no Ginkgo titles or dynamic test names, and the existing test function name is static.
Test Structure And Quality	✅ Passed	PASS: The test stays single-purpose, uses defer close(stopCh), and every poll has wait.ForeverTestTimeout with clear t.Fatalf messages.
Microshift Test Compatibility	✅ Passed	PASS: This is a Go unit test, not a Ginkgo e2e test, and it uses only fake Kubernetes clients with no MicroShift-unsupported OpenShift APIs/features.
Single Node Openshift (Sno) Test Compatibility	✅ Passed	This change only modifies a Go unit test; it contains no Ginkgo e2e test or cluster-topology assumptions that would affect SNO.
Topology-Aware Scheduling Compatibility	✅ Passed	Only a unit test changed, adding a wait for NodeTopology sync; no manifests, controllers, or scheduling constraints were introduced.
Ote Binary Stdout Contract	✅ Passed	Only a test file changed, and it contains no main/init/TestMain/suite-level stdout writes or stdout logging setup.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	Changed test only waits on internal fake NodeTopology CR; no new Ginkgo/e2e test, IPv4 literals, or external network calls were added.
No-Weak-Crypto	✅ Passed	The PR only adds a test wait/assertion flow; no MD5/SHA1/DES/RC4/3DES/Blowfish/ECB, custom crypto, or secret comparisons appear in the touched code.
Container-Privileges	✅ Passed	The PR only updates a Go test, and the touched file contains no privileged/hostPID/hostNetwork/hostIPC/allowPrivilegeEscalation/securityContext settings.
No-Sensitive-Data-In-Logs	✅ Passed	The diff only adds a wait/poll in a test; no new logging calls or sensitive data fields were introduced.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[mdbooth]

/test e2e-gcp-ovn

[openshift-ci]

@mdbooth: all tests passed!

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