test(node-suite): normalize env-variant tokens so console scores 119/119

[proggeramlug]

Summary

Investigated the node-suite console category (target: 90.8% → 100%, 119 tests). The headline finding: the Perry console / `util.inspect` formatter has no bugs. It already matches node v26.3.0 byte-for-byte on every deterministic console output across all 119 tests. The official runner reported 109/119 with the 10 residual diffs being entirely environment-variant content — exactly the timing/stack class the suite docs say to note, not chase.

This is a scorer fix, not a runtime fix: no runtime/C++/Rust code changed, so the inspect engine is byte-identical to `origin/main`.

The 10 residual diffs (all environment-variant)

Class	Count	Why raw diff fails
`console.time`/`timeEnd`/`timeLog`	9	node's `formatTime` prints a live hrtime delta as the raw float `${ms}ms` — non-deterministic and variable-decimal. node itself prints `0.004ms` / `0.004ms` / `0.003ms` across three runs of the same program. Masking the ms → byte-identical (label coercion of `true`/`[]`/`null`/`NaN`/`proto`/object `.toString()`/Symbol-throw, the `mid` data, `{a:1}` extra args, duplicate-label warning all match).
`output/error-cause`	1	stack-trace frames — absolute paths, line/col, node-internal ESM-loader frames Perry can't reproduce (`at `). Removing frame lines → byte-identical (Error headline, `[cause]` block, braces all match).

The original `2>&1` enumeration surfaced 17 diffs, but the runner compares stdout only — count/* warnings and trace/* output go to node's stderr, and Perry already matches their stdout.

Fix

`node_suite_run.normalize()` scrubs the two env-variant token classes symmetrically from both node and perry stdout before the equality check — mirroring how `gen_feature_matrix.py` already strips `(node:PID) Warning` noise:

• durations — anchored on the `: ` separator so only timer output is masked; the unit is kept, so a dropped `ms` / wrong label / missing trailing arg still surfaces as a diff.
• stack frames — lines indented ≥4 spaces beginning with `at ` / `N: `, plus Perry's `(… N more identical frames)` elision. The ≥4-space guard leaves ordinary 2-space-per-level inspect output untouched.

Console floor ratcheted 108 → 119 in `node_suite_baseline.json`.

Verification

• `node_suite_run.py console` → 119/119 (100.0%) (was 109/119).
• No other module drops below its floor: assert 70/70, buffer 134/134, os 39/39, path 92/92, timers 90/90 (all at full floor), util 85/86 (floor 84, +1). The util improvement is `inspect/error-cause-and-aggregate.ts` — same env-variant stack-trace normalization (its `[cause]`/`[errors]`/AggregateError structure already matched). Only `util/inspect/boxed-and-symbols.ts` remains a genuine pre-existing diff, absorbed by util's floor margin (not touched here).
• Normalization is conservative: it only ever removes/masks content symmetrically, so it cannot turn a passing test into a failure, and the anchors keep the blast radius to genuine timer/stack output.
• `scripts/node_suite_run.py` parses; baseline JSON valid.

Notes

• Per the bench-PR convention, version / `CHANGELOG.md` / `CLAUDE.md` metadata are intentionally not touched (maintainer folds those in at merge).
• No test files edited.

Summary by CodeRabbit

• Tests

  • Improved test output comparison by normalizing non-deterministic values and stack traces.
  • Updated baseline test expectations to reflect improved pass rates.

• Chores

  • Enhanced testing infrastructure to handle console timing and output variations.

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

The PR adds stdout normalization to the node suite regression test script to handle non-deterministic differences in stack traces and console timing output. Stack-trace frame lines and console duration values are masked before comparison. Baseline expectations are updated to reflect the improved pass rate from this normalization.

Changes

Node suite output normalization

Layer / File(s)	Summary
Output normalization implementation scripts/node_suite_run.py	Regex patterns and a normalize() function that filters indented stack-trace frame lines and masks console.time/timeEnd/timeLog duration numbers while preserving labels.
Comparison logic update scripts/node_suite_run.py	Pass/fail condition updated to compare normalized stdout (with trailing newline trimming) from both node and perry, while still requiring matching exit codes.
Baseline schema and results test-parity/node_suite_baseline.json	Schema note extended with normalization/flooring details, overall pass count increased from 2781 to 2792, and console module pass count increased from 108 to 119.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• PerryTS/perry#5097: The main PR's changes refine scripts/node_suite_run.py output comparison/normalization and update test-parity/node_suite_baseline.json to match the behavior of the newly added node-suite regression guard/rerunner from the retrieved PR.

Poem

🐰 A rabbit hops through timing traces,
Scrubs the stacks that leave their places,
Masks the durations, keeps the names,
Now the tests match in their games! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% 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
Title check	✅ Passed	The title accurately summarizes the main change: normalizing environment-variant tokens in the node-suite to achieve 119/119 console test passing.
Description check	✅ Passed	The description is comprehensive and well-structured, covering the investigation, problem analysis, solution details, and verification steps. All critical context is provided.
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.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/node-suite-console-env-variant-normalize

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