From 1d953b3a40cf950765d8b204665f9dd9237da2eb Mon Sep 17 00:00:00 2001
From: Athan Reines <kgryte+claude@gmail.com>
Date: Wed, 7 Oct 2026 02:23:53 +0000
Subject: [PATCH] test: migrate `stats/incr/nanprod` to ULP-based assertions

Migrate the test cases for `stats/incr/nanprod` from relative tolerance
assertions to ULP-based assertions using
`@stdlib/assert/is-almost-same-value`.

The ULP bound was tightened to the minimum passing integer value: `1`
for both the transient overflow and transient underflow test cases.

Ref: https://github.com/stdlib-js/stdlib/issues/11352

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012q26xGJXEMSDYX3oukdEbc

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: skipped
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
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    status: na
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    status: na
  - task: lint_repl_help
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  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
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  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
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  - task: lint_python
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  - task: lint_r
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  - task: lint_c_src
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  - task: lint_c_examples
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  - task: lint_c_benchmarks
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  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
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  - task: lint_typescript_declarations
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  - task: lint_typescript_tests
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  - task: lint_license_headers
    status: passed
---
---
 .../@stdlib/stats/incr/nanprod/test/test.js     | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/incr/nanprod/test/test.js b/lib/node_modules/@stdlib/stats/incr/nanprod/test/test.js
index a275b34031cf..cde5e80f4749 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanprod/test/test.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanprod/test/test.js
@@ -23,11 +23,10 @@
 var tape = require( 'tape' );
 var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
-var EPSILON = require( '@stdlib/constants/float64/eps' );
 var normal = require( '@stdlib/random/base/normal' );
 var ldexp = require( '@stdlib/math/base/special/ldexp' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var isnan = require( '@stdlib/assert/is-nan' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var isEven = require( '@stdlib/math/base/assert/is-even' );
 var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
 var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
@@ -135,8 +134,6 @@ tape( 'the accumulator function can return a result which overflows', function t
 
 tape( 'overflow may be transient', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var acc;
 	var x;
 	var y;
@@ -155,10 +152,7 @@ tape( 'overflow may be transient', function test( t ) {
 	acc( y );
 	acc( z );
 
-	delta = abs( expected - acc() );
-	tol = EPSILON * abs( expected );
-
-	t.strictEqual( delta <= tol, true, 'within tolerance. Expected: '+expected+'. Actual: '+acc()+'. Delta: '+delta+'. Tol: '+tol+'.' );
+	t.strictEqual( isAlmostSameValue( acc(), expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -175,8 +169,6 @@ tape( 'the accumulator function can return a result which underflows', function
 
 tape( 'underflow may be transient', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var acc;
 	var x;
 	var y;
@@ -198,10 +190,7 @@ tape( 'underflow may be transient', function test( t ) {
 
 	acc( z );
 
-	delta = abs( acc() - expected );
-	tol = EPSILON * abs( expected );
-
-	t.strictEqual( delta <= tol, true, 'within tolerance. Expected: '+expected+'. Actual: '+acc()+'. Delta: '+delta+'. Tol: '+tol+'.' );
+	t.strictEqual( isAlmostSameValue( acc(), expected, 1 ), true, 'returns expected value' );
 	t.end();
 });