From e825d7446f77961508d953d7e9a3e0e9e450d8f7 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 16 Sep 2026 09:16:33 +0000
Subject: [PATCH] test: migrate `stats/base/dists/halfnormal/mean` to ULP-based
 assertions

Replaces the computed EPS-based tolerance check with a ULP-based
comparison via `isAlmostSameValue`, tightened to the minimum ULP
distance (0) that passes across the full fixture set.

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

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wskwga4jToojqTe7wRCnNR

---
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: passed
  - task: lint_markdown_pkg_readmes
    status: na
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  - task: lint_javascript_src
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    status: passed
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  - task: lint_c_src
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  - task: lint_c_examples
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  - task: lint_license_headers
    status: passed
---
---
 .../stats/base/dists/halfnormal/mean/test/test.js | 15 ++++-----------
 .../dists/halfnormal/mean/test/test.native.js     | 15 ++++-----------
 2 files changed, 8 insertions(+), 22 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.js
index fd0dc03d50bf..8267e6d86ab3 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.js
@@ -21,10 +21,9 @@
 // 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 NINF = require( '@stdlib/constants/float64/ninf' );
-var EPS = require( '@stdlib/constants/float64/eps' );
 var mean = require( './../lib' );
 
 
@@ -64,24 +63,18 @@ tape( 'if provided a nonpositive `sigma`, the function returns `NaN`', function
 
 tape( 'the function returns the expected value of a half-normal distribution', function test( t ) {
 	var expected;
-	var delta;
 	var sigma;
-	var tol;
+	var ULP;
 	var y;
 	var i;
 
 	sigma = data.sigma;
 	expected = data.expected;
 
+	ULP = 0;
 	for ( i = 0; i < sigma.length; i++ ) {
 		y = mean( sigma[i] );
-		delta = abs( y - expected[i] );
-		tol = 1.0 * EPS * abs( expected[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'sigma: '+sigma[i] );
-		} else {
-			t.ok( delta <= tol, 'within tolerance. σ: '+sigma[i]+'. y: '+y+'. E: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[i], ULP ), true, 'returns expected value' );
 	}
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.native.js
index 18f943c5158f..3a0cc67a9385 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/mean/test/test.native.js
@@ -23,9 +23,8 @@
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+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 EPS = require( '@stdlib/constants/float64/eps' );
 
 
 // FIXTURES //
@@ -69,24 +68,18 @@ tape( 'if provided a nonpositive `sigma`, the function returns `NaN`', opts, fun
 
 tape( 'the function returns the expected value of a half-normal distribution', opts, function test( t ) {
 	var expected;
-	var delta;
 	var sigma;
-	var tol;
+	var ULP;
 	var y;
 	var i;
 
 	expected = data.expected;
 	sigma = data.sigma;
 
+	ULP = 0;
 	for ( i = 0; i < sigma.length; i++ ) {
 		y = mean( sigma[i] );
-		delta = abs( y - expected[i] );
-		tol = 1.0 * EPS * abs( expected[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'sigma: '+sigma[i] );
-		} else {
-			t.ok( delta <= tol, 'within tolerance. σ: '+sigma[i]+'. y: '+y+'. E: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
-		}
+		t.strictEqual( isAlmostSameValue( y, expected[i], ULP ), true, 'returns expected value' );
 	}
 	t.end();
 });