From ad782492728bcb47222729a3d27d93947f1631ca Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Fri, 2 Oct 2026 06:27:22 +0000
Subject: [PATCH] test: migrate `stats/base/dists/planck/variance` to ULP-based
 assertions

Migrates unit tests from relative tolerance checks (`delta <= tol`) to
ULP-based assertions using `@stdlib/assert/is-almost-same-value`.

The measured maximum ULP difference over the 1000-element Python fixture
set is 1, so the assertions use a bound of 1 ULP, which is the tightest
integer bound which passes (a bound of 0 fails 103 of the 1000 cases).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017VFfQViBwsnjm37sqzyMF6
---
 .../stats/base/dists/planck/variance/test/test.js   | 13 ++-----------
 .../base/dists/planck/variance/test/test.native.js  | 13 ++-----------
 2 files changed, 4 insertions(+), 22 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.js
index 58ea9f4caede..95ba96879d52 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.js
@@ -21,9 +21,8 @@
 // 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 EPS = require( '@stdlib/constants/float64/eps' );
 var variance = require( './../lib' );
 
 
@@ -60,8 +59,6 @@ tape( 'if provided a shape parameter `lambda` which is nonpositive, the function
 tape( 'the function returns the variance of a Planck distribution', function test( t ) {
 	var expected;
 	var lambda;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
@@ -69,13 +66,7 @@ tape( 'the function returns the variance of a Planck distribution', function tes
 	lambda = data.lambda;
 	for ( i = 0; i < expected.length; i++ ) {
 		y = variance( 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 ], 1 ), true, 'returns expected value' );
 	}
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.native.js
index 8b4207032eb3..7bdab4c934b9 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/planck/variance/test/test.native.js
@@ -22,9 +22,8 @@
 
 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 abs = require( '@stdlib/math/base/special/abs' );
-var EPS = require( '@stdlib/constants/float64/eps' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -69,8 +68,6 @@ tape( 'if provided a shape parameter `lambda` which is nonpositive, the function
 tape( 'the function returns the variance of a Planck distribution', opts, function test( t ) {
 	var expected;
 	var lambda;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
@@ -78,13 +75,7 @@ tape( 'the function returns the variance of a Planck distribution', opts, functi
 	lambda = data.lambda;
 	for ( i = 0; i < expected.length; i++ ) {
 		y = variance( 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 ], 1 ), true, 'returns expected value' );
 	}
 	t.end();
 });