From 7a99c80d3cc228fcbf6f5912233fb9aadef8bda9 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 6 Aug 2026 10:24:00 +0000
Subject: [PATCH] test: migrate `math/base/special/expit` to ULP-based
 assertions

Migrate the `math/base/special/expit` tests from relative tolerance
(`EPS`-scaled) assertions to ULP-based assertions using
`@stdlib/assert/is-almost-same-value`. The ULP bound was tightened to
the measured minimum of `2` for both the JavaScript and native test
files.

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_014zrHEc6Qt61uPr8oo1zWcM
---
 .../math/base/special/expit/test/test.js      | 25 ++++---------------
 .../base/special/expit/test/test.native.js    | 25 ++++---------------
 2 files changed, 10 insertions(+), 40 deletions(-)

diff --git a/lib/node_modules/@stdlib/math/base/special/expit/test/test.js b/lib/node_modules/@stdlib/math/base/special/expit/test/test.js
index 9949d6a5998b..1938569dff7e 100644
--- a/lib/node_modules/@stdlib/math/base/special/expit/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/expit/test/test.js
@@ -21,11 +21,10 @@
 // MODULES //
 
 var tape = require( 'tape' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var expit = require( './../lib' );
 
 
@@ -69,46 +68,32 @@ tape( 'the function returns `0.0` when provided `-Infinity`', function test( t )
 
 tape( 'the function evaluates the standard logistic function for negative numbers', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
 
 	expected = negative.expected;
 	x = negative.x;
+
 	for ( i = 0; i < x.length; i++ ) {
 		y = expit( x[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] );
-		} else {
-			delta = abs( y - expected[i] );
-			tol = 1.5 * EPS * abs( expected[i] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. v: '+y+'. E: '+expected[i]+' Δ: '+delta+'. tol: '+tol );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the standard logistic function for positive numbers', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
 
 	expected = positive.expected;
 	x = positive.x;
+
 	for ( i = 0; i < x.length; i++ ) {
 		y = expit( x[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] );
-		} else {
-			delta = abs( y - expected[i] );
-			tol = 1.5 * EPS * abs( expected[i] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. v: '+y+'. E: '+expected[i]+' Δ: '+delta+'. tol: '+tol );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/math/base/special/expit/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/expit/test/test.native.js
index dfba0fbc0ff8..a12fb62ac3b4 100644
--- a/lib/node_modules/@stdlib/math/base/special/expit/test/test.native.js
+++ b/lib/node_modules/@stdlib/math/base/special/expit/test/test.native.js
@@ -22,12 +22,11 @@
 
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
 var tryRequire = require( '@stdlib/utils/try-require' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
 
 
 // FIXTURES //
@@ -78,46 +77,32 @@ tape( 'the function returns `0.0` when provided `-Infinity`', opts, function tes
 
 tape( 'the function evaluates the standard logistic function for negative numbers', opts, function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
 
 	expected = negative.expected;
 	x = negative.x;
+
 	for ( i = 0; i < x.length; i++ ) {
 		y = expit( x[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] );
-		} else {
-			delta = abs( y - expected[i] );
-			tol = 1.5 * EPS * abs( expected[i] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. v: '+y+'. E: '+expected[i]+' Δ: '+delta+'. tol: '+tol );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the standard logistic function for positive numbers', opts, function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
 
 	expected = positive.expected;
 	x = positive.x;
+
 	for ( i = 0; i < x.length; i++ ) {
 		y = expit( x[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+', expected: '+expected[i] );
-		} else {
-			delta = abs( y - expected[i] );
-			tol = 1.5 * EPS * abs( expected[i] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. v: '+y+'. E: '+expected[i]+' Δ: '+delta+'. tol: '+tol );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });