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test: migrate math/base/special/gamma-lanczos-sum-expg-scaled to ULP-based assertions #14336

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Merged
kgryte merged 1 commit into from
Aug 16, 2026
+4 −22
Merged

test: migrate math/base/special/gamma-lanczos-sum-expg-scaled to ULP-based assertions #14336

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13 changes: 2 additions & 11 deletions lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sum-expg-scaled/test/test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,10 @@ var tape = require( 'tape' );
var linspace = require( '@stdlib/array/base/linspace' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var gamma = require( '@stdlib/math/base/special/gamma' );
var abs = require( '@stdlib/math/base/special/abs' );
var exp = require( '@stdlib/math/base/special/exp' );
var pow = require( '@stdlib/math/base/special/pow' );
var EPS = require( '@stdlib/constants/float64/eps' );
var G = require( '@stdlib/constants/float64/gamma-lanczos-g' );
var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
var gammaLanczosSumExpGScaled = require( './../lib' );


Expand All @@ -48,8 +47,6 @@ tape( 'if provided `NaN`, the function returns `NaN`', function test( t ) {

tape( 'the function evaluates the Lanczos sum (scaled by exp(-g))', function test( t ) {
var expected;
var delta;
var tol;
var i;
var x;
var y;
Expand All @@ -60,13 +57,7 @@ tape( 'the function evaluates the Lanczos sum (scaled by exp(-g))', function tes
expected = gamma( x[i] );
expected /= pow( x[i]+G-0.5, x[i]-0.5 ) / ( exp( x[i]+G-0.5 ) );
expected /= exp( G );
if ( y === expected ) {
t.strictEqual( y, expected, 'x: '+x[i]+', y: '+y+', expected: '+expected );
} else {
delta = abs( y - expected );
tol = 10.0 * EPS * abs( expected );
t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. y: '+y+'. E: '+expected+'. Δ: '+delta+'. tol: '+tol );
}
t.strictEqual( isAlmostSameValue( y, expected, 12 ), true, 'returns expected value' );
}
t.end();
});
13 changes: 2 additions & 11 deletions lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sum-expg-scaled/test/test.native.js
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Expand Up @@ -25,11 +25,10 @@ var tape = require( 'tape' );
var linspace = require( '@stdlib/array/base/linspace' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var gamma = require( '@stdlib/math/base/special/gamma' );
var abs = require( '@stdlib/math/base/special/abs' );
var exp = require( '@stdlib/math/base/special/exp' );
var pow = require( '@stdlib/math/base/special/pow' );
var EPS = require( '@stdlib/constants/float64/eps' );
var G = require( '@stdlib/constants/float64/gamma-lanczos-g' );
var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
var tryRequire = require( '@stdlib/utils/try-require' );


Expand Down Expand Up @@ -57,8 +56,6 @@ tape( 'if provided `NaN`, the function returns `NaN`', opts, function test( t )

tape( 'the function evaluates the Lanczos sum (scaled by exp(-g))', opts, function test( t ) {
var expected;
var delta;
var tol;
var i;
var x;
var y;
Expand All @@ -71,13 +68,7 @@ tape( 'the function evaluates the Lanczos sum (scaled by exp(-g))', opts, functi
// eslint-disable-next-line max-len
expected /= pow( x[ i ] + G - 0.5, x[ i ] - 0.5 ) / ( exp( x[ i ] + G - 0.5 ) );
expected /= exp( G );
if ( y === expected ) {
t.strictEqual( y, expected, 'x: '+x[ i ]+', y: '+y+', expected: '+expected );
} else {
delta = abs( y - expected );
tol = 10.0 * EPS * abs( expected );
t.ok( delta <= tol, 'within tolerance. x: '+x[ i ]+'. y: '+y+'. E: '+expected+'. Δ: '+delta+'. tol: '+tol );
}
t.strictEqual( isAlmostSameValue( y, expected, 12 ), true, 'returns expected value' );
}
t.end();
});