From 36d2fdcd727380234800bcc6e819742bc27a0c3d Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Fri, 7 Aug 2026 14:31:30 +0000
Subject: [PATCH] test: migrate `stats/base/dists/erlang/skewness` to ULP-based
 assertions

Migrate the tests for `stats/base/dists/erlang/skewness` from relative
tolerance testing to ULP difference testing using
`@stdlib/assert/is-almost-same-value`.

All 200 fixture values are bit-for-bit exact for both the JavaScript and
the C implementations, so the ULP bound is tightened to the measured
minimum of 0.

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_01T1qAkJFoiG9eerDmaEhcUC
---
 .../stats/base/dists/erlang/skewness/test/test.js   | 13 ++-----------
 .../base/dists/erlang/skewness/test/test.native.js  | 13 ++-----------
 2 files changed, 4 insertions(+), 22 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.js
index e41c2fded4f7..a572f7aad479 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.js
@@ -21,11 +21,10 @@
 // MODULES //
 
 var tape = require( 'tape' );
-var abs = require( '@stdlib/math/base/special/abs' );
+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 skewness = require( './../lib' );
 
 
@@ -106,8 +105,6 @@ tape( 'if provided `lambda <= 0`, the function returns `NaN`', function test( t
 tape( 'the function returns the skewness of an Erlang distribution', function test( t ) {
 	var expected;
 	var lambda;
-	var delta;
-	var tol;
 	var k;
 	var i;
 	var y;
@@ -117,13 +114,7 @@ tape( 'the function returns the skewness of an Erlang distribution', function te
 	lambda = data.lambda;
 	for ( i = 0; i < expected.length; i++ ) {
 		y = skewness( k[i], lambda[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'k: '+k[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. k: '+k[i]+'. 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/erlang/skewness/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.native.js
index afb974b61f8e..5e14b9185913 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/erlang/skewness/test/test.native.js
@@ -22,12 +22,11 @@
 
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
-var abs = require( '@stdlib/math/base/special/abs' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
-var EPS = require( '@stdlib/constants/float64/eps' );
 
 
 // FIXTURES //
@@ -109,8 +108,6 @@ tape( 'if provided `lambda <= 0`, the function returns `NaN`', opts, function te
 tape( 'the function returns the skewness of an Erlang distribution', opts, function test( t ) {
 	var expected;
 	var lambda;
-	var delta;
-	var tol;
 	var k;
 	var i;
 	var y;
@@ -120,13 +117,7 @@ tape( 'the function returns the skewness of an Erlang distribution', opts, funct
 	lambda = data.lambda;
 	for ( i = 0; i < expected.length; i++ ) {
 		y = skewness( k[i], lambda[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'k: '+k[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. k: '+k[i]+'. 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();
 });