[Planeshifter]

Resolves a part of #11352.

Description

What is the purpose of this pull request?

This pull request:

• Migrates math/base/special/cfloorn test cases from relative-tolerance (EPS-based) comparisons to ULP-difference-based assertions, per the RFC in [RFC]: Migrate math/base/special packages from relative tolerance testing to ULP difference testing (tracking issue) #11352.
• In test/test.js and test/test.native.js, the single test case using the old delta = abs( ... ); tol = EPS * abs( ... ); t.strictEqual( delta <= tol, true, ... ) idiom (subnormal-rounding test) is replaced with t.strictEqual( isAlmostSameValue( ..., ..., 1 ), true, 'returns expected value' ), dropping the now-unused EPS and abs requires in favor of @stdlib/assert/is-almost-same-value.
• The ULP bound was tightened empirically: 1 passes the full fixture set (890 assertions in test.js); 0 (exact equality) fails 12 of those assertions, so 1 is the minimum required bound.

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.

test/test.native.js mirrors the same conversion for the native addon test file; those tests are skipped in this environment (no compiled native addon available), but test/test.js was run twice to confirm deterministic results at ULP=1.

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, mirroring the ULP-migration idiom from prior merged PRs in the same package family (e.g. math/base/special/cceiln, math/base/special/floorn) and empirically tightening the ULP bound as described above.

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/cfloorn	$\\color{green}179/179$ $\\color{green}+100.00\\%$	$\\color{green}5/5$ $\\color{green}+100.00\\%$	$\\color{green}2/2$ $\\color{green}+100.00\\%$	$\\color{green}179/179$ $\\color{green}+100.00\\%$

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