test: migrate stats/incr/mmaape to ULP-based assertions

[kgryte]

Resolves a part of #11352.

Description

What is the purpose of this pull request?

This pull request:

• migrates the tests for stats/incr/mmaape from relative tolerance testing to ULP difference testing, as proposed in [RFC]: Migrate math/base/special packages from relative tolerance testing to ULP difference testing (tracking issue) #11352.

Specifically, in test/test.js:

• replaces the computed relative tolerance (delta = abs( expected[i] - actual ), tol = 1.0 * EPS * abs( expected[i] )) with isAlmostSameValue( actual, expected[i], 1 ).
• adds the @stdlib/assert/is-almost-same-value require and removes the now unused @stdlib/math/base/special/abs and @stdlib/constants/float64/eps requires.
• normalizes the assertion message to 'returns expected value'.

ULP bound: 1 ULP (one call site).

The bound is the measured minimum. The maximum observed ULP difference over the full fixture set is 1, occurring at windows 4 and 5:

window	actual	expected	ULP diff
0	0.3217505543966422	0.3217505543966422	0
1	0.7144496360953663	0.7144496360953663	0
2	0.8038976651460206	0.8038976651460206	0
3	0.6966474803471399	0.6966474803471399	0
4	0.5311732292121792	0.5311732292121791	1
5	0.26937384141302984	0.2693738414130298	1

Tightening to 0 ULP fails exactly those two assertions, confirming 1 is the minimum. The suite was run twice at the final bound to confirm determinism (98 passing, 0 failing both times):

$ make test TESTS_FILTER=".*/stats/incr/mmaape/.*"
  total:     98
  passing:   98

The test fixtures are hardcoded, so the result is independent of any PRNG state.

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.

Only test/test.js is modified; no source, documentation, or benchmark files are touched. The package has no test.native.js, so there is no JS vs. C discrepancy to account for here.

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. The migration was performed mechanically against the idiom established by previously merged stats/incr conversions, and the ULP bound was determined empirically via @stdlib/number/float64/base/ulp-difference rather than guessed.

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🤖 Generated with Claude Code

https://claude.ai/code/session_01Dtg5oB6tbJnvp5MUwBBMeT

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Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/mmaape	$\\color{green}144/144$ $\\color{green}+100.00\\%$	$\\color{green}8/8$ $\\color{green}+100.00\\%$	$\\color{green}2/2$ $\\color{green}+100.00\\%$	$\\color{green}144/144$ $\\color{green}+100.00\\%$

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