From e47c62ec1ba7f78c3f3fd0bfc6252e0ec3d06109 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 3 Sep 2026 14:28:39 +0000
Subject: [PATCH] test: migrate `stats/base/dists/exponential/stdev` to
 ULP-based assertions

Migrate the standard deviation tests for the exponential distribution
from relative tolerance comparisons to ULP-based assertions using
`@stdlib/assert/is-almost-same-value`.

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_019Ba3VZAiNQUyCZRWJuJQqw
---
 .../stats/base/dists/exponential/stdev/test/test.js | 13 ++-----------
 .../dists/exponential/stdev/test/test.native.js     | 13 ++-----------
 2 files changed, 4 insertions(+), 22 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.js
index 659b83c3825b..1d5aa922d38e 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.js
@@ -21,10 +21,9 @@
 // MODULES //
 
 var tape = require( 'tape' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
-var EPS = require( '@stdlib/constants/float64/eps' );
 var stdev = require( './../lib' );
 
 
@@ -62,8 +61,6 @@ tape( 'if provided a rate parameter `lambda` that is not a nonnegative number, t
 tape( 'the function returns the standard deviation of an exponential distribution', function test( t ) {
 	var expected;
 	var lambda;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
@@ -71,13 +68,7 @@ tape( 'the function returns the standard deviation of an exponential distributio
 	lambda = data.lambda;
 	for ( i = 0; i < expected.length; i++ ) {
 		y = stdev( lambda[i] );
-		if ( y === expected[ i ] ) {
-			t.strictEqual( y, expected[i], 'lambda: '+lambda[i]+', y: '+y+', expected: '+expected[i] );
-		} else {
-			delta = abs( y - expected[ i ] );
-			tol = 1.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. lambda: '+lambda[i]+'. y: '+y+'. E: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[ i ], 0 ), true, 'returns expected value' );
 	}
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.native.js
index 5ae6c79cf1f1..40777297d48c 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/exponential/stdev/test/test.native.js
@@ -22,11 +22,10 @@
 
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
-var EPS = require( '@stdlib/constants/float64/eps' );
 
 
 // VARIABLES //
@@ -71,8 +70,6 @@ tape( 'if provided a rate parameter `lambda` that is not a nonnegative number, t
 tape( 'the function returns the standard deviation of an exponential distribution', opts, function test( t ) {
 	var expected;
 	var lambda;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
@@ -80,13 +77,7 @@ tape( 'the function returns the standard deviation of an exponential distributio
 	lambda = data.lambda;
 	for ( i = 0; i < expected.length; i++ ) {
 		y = stddev( lambda[i] );
-		if ( y === expected[ i ] ) {
-			t.strictEqual( y, expected[i], 'lambda: '+lambda[i]+', y: '+y+', expected: '+expected[i] );
-		} else {
-			delta = abs( y - expected[ i ] );
-			tol = 1.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. lambda: '+lambda[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. tol: '+tol+'.' );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[ i ], 0 ), true, 'returns expected value' );
 	}
 	t.end();
 });