From 7257d3e9619603410ad62c52b0c120d327ada8b4 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Fri, 18 Sep 2026 22:15:47 +0000
Subject: [PATCH] test: migrate `stats/incr/prod` to ULP-based assertions

Migrate the relative tolerance assertions in `stats/incr/prod` tests to
ULP-based assertions using `@stdlib/assert/is-almost-same-value`. Both
converted assertions were tightened to a measured minimum of 1 ULP.

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_01FsMJkqn6MeCqGA4HCRiJEe
---
 .../@stdlib/stats/incr/prod/test/test.js        | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/incr/prod/test/test.js b/lib/node_modules/@stdlib/stats/incr/prod/test/test.js
index 1b0f6725ce82..e5cf3532c1b7 100644
--- a/lib/node_modules/@stdlib/stats/incr/prod/test/test.js
+++ b/lib/node_modules/@stdlib/stats/incr/prod/test/test.js
@@ -24,12 +24,11 @@ var tape = require( 'tape' );
 var zeros = require( '@stdlib/array/zeros' );
 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 randu = require( '@stdlib/random/base/randu' );
 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' );
@@ -131,8 +130,6 @@ 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;
@@ -150,10 +147,7 @@ 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();
 });
 
@@ -169,8 +163,6 @@ 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;
@@ -191,10 +183,7 @@ 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();
 });