test(bdd): group required environment checks

[sbaum1994]

TL;DR

Adds a table-driven required-environment-variable step and uses it in every BDD feature with grouped prerequisites. Each variable remains visible in Gherkin while repeated one-line checks are removed.

Additional Details

The live install features repeat the same prerequisite operation up to nine times per background, which makes the operator inputs harder to scan.

• Validate a one-column name table and report the first missing variable.
• Share validation with the existing singular step.
• Cover valid, missing, empty, and malformed tables.
• Migrate all local, observability, and EKS prerequisite groups.
• Keep runtime-derived EKS exports explicit because they are actions, not prerequisites.

Usage:

Given these environment variables are set:
  | name            |
  | NGC_API_KEY     |
  | SAMPLE_NGC_ORG  |
  | SAMPLE_NGC_TEAM |

Customer release notes: Not customer visible.

Plan summary: Not applicable.

Dependencies: None. No license or NOTICE changes.

Related Pull Requests: #1018

For the Reviewer

Please confirm the table keeps operator prerequisites explicit and that runtime-produced EKS values remain separate export steps.

For QA

Passed on rebased commit 21d4d475:

• go test -short ./...
• golangci-lint run --config .golangci.yml ./...
• All four observability profile features: 4 scenarios, 136 steps
• TestMultiClusterUp: 4 scenarios, 49 steps
• TestSingleClusterUpOneClick: 1 scenario, 15 steps

Additional local coverage reached the expected existing-feature drift after the migrated prerequisites and install paths passed:

• TestSingleClusterUp: all 41 steps passed with a temporary current-main localhost:10081 profile expectation; the committed feature still expects grpc.localhost:10081.
• Single- and multi-cluster Helmfile: control-plane install, registration, compute-plane install, and healthy NVCA passed; the sample workload then failed because NCP.GPU.H100_8x is no longer accepted.
• Upstream-images Helmfile: prerequisites and render passed; its manifest assertion still expects the previous out/*-nats directory layout.

The branch now includes the Cassandra image correction merged in #1018. Temporary live-test overrides and all ncp-local clusters were removed. EKS wiring is covered by the short suite; live EKS features were not run because no EKS clusters were in scope.

QA needed: No separate DSL QA.

Issues

Closes #860

Relates to #858

Checklist

• I am familiar with the Contributing Guidelines.
• I have signed off my commits for Developer Certificate of Origin (DCO) compliance.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

Summary by CodeRabbit

• New Features

  • Added table-based validation for checking multiple required environment variables at once.
  • Reports the first missing variable clearly and rejects invalid or blank variable names.

• Documentation

  • Updated environment setup guidance and examples to use the consolidated table format.

• Tests

  • Added coverage for successful validation, missing variables, invalid tables, and blank names.
  • Updated observability and deployment scenarios to use consolidated environment checks.

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📥 Commits

Reviewing files that changed from the base of the PR and between 21d4d47 and 3ce33fd.

📒 Files selected for processing (2)

• tests/bdd/dsl/env_test.go
• tests/bdd/steps/steps_test.go

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📝 Walkthrough

Walkthrough

The BDD DSL now validates multiple environment variables from a table. The step validates table structure, rejects blank names, reports the first missing variable, and replaces repeated prerequisite steps across BDD features.

Changes

Environment-variable validation

Layer / File(s)	Summary
Environment validation helper tests/bdd/dsl/env.go, tests/bdd/dsl/env_test.go	Added RequireEnvironmentVariables with ordered checks, blank-name validation, missing-variable errors, and unit tests.
Table step wiring and coverage tests/bdd/steps/file_steps.go, tests/bdd/steps/steps_test.go	Added and registered the table-based step. The handler validates the name column and delegates checks to the DSL helper.
Feature and DSL documentation migration tests/bdd/PLAN.md, tests/bdd/features/*.feature	Documented the new step and replaced repeated environment-variable checks while preserving the required variable names.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to 3ce33

The change groups BDD environment checks while keeping runtime-derived EKS exports explicit; no actionable merge-blocking risk remains after normal checks and review.

Sequence Diagram(s)

sequenceDiagram
  participant FeatureBackground
  participant GodogStep
  participant DSLHelper
  FeatureBackground->>GodogStep: provide environment-variable table
  GodogStep->>GodogStep: validate the name header and rows
  GodogStep->>DSLHelper: pass ordered variable names
  DSLHelper-->>GodogStep: return success or first missing variable
  GodogStep-->>FeatureBackground: continue or report validation error

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Suggested reviewers: nv-lacm

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 18.18% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title uses valid Conventional Commits syntax and accurately describes the BDD environment-check grouping change.
Linked Issues check	✅ Passed	Issue [#860] is addressed through documented table validation, empty-name rejection, missing-variable reporting, tests, and prerequisite migration.
Out of Scope Changes check	✅ Passed	All changes support grouped BDD environment-variable checks and the linked issue; no unrelated changes are evident.

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/bdd-required-env-vars-dsl

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Actionable comments posted: 1

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Inline comments:
In `@tests/bdd/dsl/env_test.go`:
- Around line 33-41: Make both missing-variable tests independent of inherited
environment values: in tests/bdd/dsl/env_test.go lines 33-41, set
BDD_ENV_MISSING_EXACT to an empty value before calling
RequireEnvironmentVariables; in tests/bdd/steps/steps_test.go lines 174-188, set
BDD_TMP_REQUIRED_MISSING to an empty value before calling
environmentVariablesAreSet.

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Fix all unresolved CodeRabbit comments on this PR:

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Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

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📥 Commits

Reviewing files that changed from the base of the PR and between d8c4a5b and 0c2fbfb.

📒 Files selected for processing (9)

• tests/bdd/PLAN.md
• tests/bdd/dsl/env.go
• tests/bdd/dsl/env_test.go
• tests/bdd/features/observability-all.feature
• tests/bdd/features/observability-compute.feature
• tests/bdd/features/observability-control.feature
• tests/bdd/features/observability-disabled.feature
• tests/bdd/steps/file_steps.go
• tests/bdd/steps/steps_test.go

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