fix: skip Multisubnet test for single network infra

[abhay-nutanix]

Guard in the BeforeEach that reuses the existing hasMultiSubnetConfiguration() helper (which returns true only when some failure domain has more than one subnet). When no multi-subnet infrastructure is present, the suite now skips gracefully:

Summary by CodeRabbit

• Tests
  • Multi-subnet conformance checks now skip automatically when the cluster does not use a multi-subnet configuration.
  • Prevents irrelevant validation steps from running in unsupported environments.

[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: cfb2f038-d61c-4110-99bc-967975636d81

📥 Commits

Reviewing files that changed from the base of the PR and between aadf54d and ede8972.

📒 Files selected for processing (1)

• test/e2e/nutanix/multi-subnet.go

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Walkthrough

The Nutanix multi-subnet conformance setup now skips scenarios when the fetched machine networks do not represent a multi-subnet configuration.

Changes

Nutanix multi-subnet test gating

Layer / File(s)	Summary
Configuration-based test skip test/e2e/nutanix/multi-subnet.go	BeforeEach evaluates hasMultiSubnetConfiguration(machineNetworks) and skips the remaining setup and validations for single-subnet clusters.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 14 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Single Node Openshift (Sno) Test Compatibility	⚠️ Warning	The suite has no SNO guard and still assumes multi-node behavior (e.g. node/subnet validation and a MachineSet scale-up/scale-down test).	Add a [Skipped:SingleReplicaTopology] label or a runtime single-node skip (exutil.IsSingleNode/skipOnSingleNodeTopology) for this suite or the scaling test.

✅ Passed checks (14 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: skipping the Multisubnet test when the infrastructure has only a single network.
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	PR only adds a BeforeEach skip guard; all Ginkgo titles in the file are static and deterministic.
Test Structure And Quality	✅ Passed	BeforeEach now skips early via hasMultiSubnetConfiguration, matching repo patterns and avoiding unnecessary cluster work; no new quality issues introduced.
Microshift Test Compatibility	✅ Passed	PASS: All Ginkgo It blocks in the Nutanix suite are tagged [apigroup:machine.openshift.io], so MicroShift CI auto-skips them; the PR only adds a BeforeEach skip.
Topology-Aware Scheduling Compatibility	✅ Passed	Change only adds a BeforeEach skip in an e2e test; it introduces no manifests, controllers, or scheduling constraints.
Ote Binary Stdout Contract	✅ Passed	Change only adds a BeforeEach skip; no process-level stdout writes or suite/init/TestMain hooks appear in the nutanix test package.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	The PR only adds a BeforeEach skip guard; it adds no new IPv4-specific logic or external connectivity, and the test file contains no hardcoded IPv4/public URLs.
No-Weak-Crypto	✅ Passed	The PR only adds a skip guard in an e2e test; no weak crypto primitives, custom crypto, or secret comparisons were introduced.
Container-Privileges	✅ Passed	Only a Go e2e test changed; no container/K8s manifests were added or edited, and the patch contains no privileged/host* or allowPrivilegeEscalation settings.
No-Sensitive-Data-In-Logs	✅ Passed	Only a static skip message was added; no logging or secrets/PII exposure appears in the changed Nutanix test.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 golangci-lint (2.12.2)

Error: can't load config: unsupported version of the configuration: "" See https://golangci-lint.run/docs/product/migration-guide for migration instructions
The command is terminated due to an error: can't load config: unsupported version of the configuration: "" See https://golangci-lint.run/docs/product/migration-guide for migration instructions

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[damdo]

/test unit

[openshift-ci]

@abhay-nutanix: all tests passed!

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[nischawl]

/lgtm

[damdo]

/approve

[openshift-ci]

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This pull-request has been approved by: damdo

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