[kgryte]

Resolves a part of #11352.

Description

What is the purpose of this pull request?

This pull request:

• migrates the tests for math/base/special/logitf from relative-tolerance assertions (delta = absf( y - expected[i] ), tol = EPS * absf( expected[i] ), t.ok( delta <= tol, ... )) to ULP-difference assertions using @stdlib/number/float32/base/assert/is-almost-same-value.
• applies the same migration to both test/test.js and test/test.native.js.
• preserves all existing test cases, structure, and non-tolerance assertions (e.g., special-case values for NaN, values outside [0,1], 0, and 1).

Expected values are converted to single-precision via @stdlib/number/float64/base/to-float32 before comparison, consistent with other migrated single-precision packages (e.g., math/base/special/xlogyf, math/base/special/log10f, math/base/special/rad2degf).

The minimum ULP bounds used per fixture block (identical for test.js and test.native.js) are:

Fixture block	ULP
small ((0,0.25])	1
medium ([0.25,0.75])	1
large ([0.75,1))	1

Each ULP value is the minimum integer N such that isAlmostSameValuef( actual, expected, N ) holds for every fixture entry in that block; the measured maximum ULP difference is 1 for all three blocks (500 fixture values each), and N = 0 fails (113 cases). The JavaScript and C implementations produce identical results across the full fixture set, so both test files use the same bounds. Tests were run twice at the final N (1507 assertions passing per file, native addon built locally so test.native.js was exercised rather than skipped) to confirm deterministic passing.

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.

No.

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 PR was authored by Claude Code: the assistant mechanically converted the tolerance-based assertions to isAlmostSameValuef, agentically searched for the minimum ULP bound per fixture block, verified determinism across two full runs, and ran the local lint and test suites before submitting.

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@stdlib-js/reviewers

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/logitf	$\\color{green}192/192$ $\\color{green}+100.00\\%$	$\\color{green}13/13$ $\\color{green}+100.00\\%$	$\\color{green}2/2$ $\\color{green}+100.00\\%$	$\\color{green}192/192$ $\\color{green}+100.00\\%$

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