[kgryte]

Description

What is the purpose of this pull request?

This pull request:

• migrates the tests for @stdlib/stats/base/dists/erlang/stdev from computed EPS-based relative tolerance assertions to ULP-based assertions using @stdlib/assert/is-almost-same-value, as described in [RFC]: Migrate math/base/special packages from relative tolerance testing to ULP difference testing (tracking issue) #11352.
• replaces the if ( y === expected[i] ) { ... } else { delta/tol ... } idiom in test/test.js and test/test.native.js with t.strictEqual( isAlmostSameValue( y, expected[ i ], 2 ), true, 'returns expected value' );.
• removes the now unused @stdlib/math/base/special/abs and @stdlib/constants/float64/eps requires.

Only test files are modified; no implementation changes.

ULP bounds

Both test/test.js and test/test.native.js use a bound of 2 ULP, which is the measured minimum over the full Julia fixture set:

File	ULP	Notes
test/test.js	2	max observed ULP difference over all 217 fixture values is 2 (worst case: k = 19, lambda = 18.453885592489083); a bound of 1 fails
test/test.native.js	2	native addon built locally and exercised; identical worst case, 1 fails

Verification performed:

• Started at N = 64, then tightened to the measured minimum by computing, for every fixture value, the smallest N for which isAlmostSameValue returns true.
• Confirmed N = 1 fails in both test/test.js and test/test.native.js, and N = 2 passes.
• Ran the full suite twice at N = 2 for both files with identical results (217/217 and 215/215 passing), confirming determinism.
• The native addon was compiled locally (make install-node-addons) so the test.native.js assertions actually executed rather than being skipped. This is expected, since both implementations compute sqrt( k ) / lambda with a correctly rounded square root and division, leaving no room for FMA-related divergence.
• eslint (tests configuration) is clean for both files.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• [RFC]: Migrate math/base/special packages from relative tolerance testing to ULP difference testing (tracking issue) #11352

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

Note that make lint-editorconfig-files could not be run in this environment, as it attempts to download the editorconfig-checker binary from a GitHub release which is not reachable here. The changed files were instead checked manually for tab indentation, absence of trailing whitespace, LF line endings, UTF-8 encoding, and a final newline.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

This PR was authored by Claude Code running as an unattended task. The test conversion mirrors the idiom already established in previously converted packages (e.g. stats/base/dists/erlang/skewness), and the ULP bound was determined empirically by measuring the maximum ULP difference across the fixture set.

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@stdlib-js/reviewers

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/erlang/stdev	$\\color{green}200/200$ $\\color{green}+100.00\\%$	$\\color{green}9/9$ $\\color{green}+100.00\\%$	$\\color{green}2/2$ $\\color{green}+100.00\\%$	$\\color{green}200/200$ $\\color{green}+100.00\\%$

The above coverage report was generated for the changes in this PR.