test: migrate math/base/special/log1pexp to ULP-based testing

PR-URL: #13937
Ref: #11352

Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: ujjwalv01

lib/node_modules/@stdlib/math/base/special/log1pexp/test/test.js

@@ -21,9 +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 randu = require( '@stdlib/random/base/randu' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var exp = require( '@stdlib/math/base/special/exp' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var log1pexp = require( './../lib' );
@@ -79,18 +79,14 @@ tape( 'the function computes the natural logarithm of `1+exp(x)` (`x > 33.3`)',
 
 tape( 'the function accurately computes the natural logarithm of `1+exp(x)`', function test( t ) {
 	var actual;
-	var delta;
-	var tol;
 	var i;
 
 	for ( i = 0; i < data.length; i++ ) {
 		actual = log1pexp( data[ i ] );
 		if ( actual === expected[ i ] ) {
 			t.strictEqual( actual, expected[ i ], 'returns '+actual+' when provided ' + data[ i ]);
 		} else {
-			delta = abs( actual - expected[ i ] );
-			tol = 85.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. x: '+data[ i ]+'. actual: '+actual+'. expected: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
+			t.strictEqual( isAlmostSameValue( actual, expected[ i ], 2 ), true, 'returns expected value' );
 		}
 	}
 	t.end();

lib/node_modules/@stdlib/math/base/special/log1pexp/test/test.native.js

@@ -22,9 +22,9 @@
 
 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 randu = require( '@stdlib/random/base/randu' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var exp = require( '@stdlib/math/base/special/exp' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 var EPS = require( '@stdlib/constants/float64/eps' );
@@ -88,18 +88,14 @@ tape( 'the function computes the natural logarithm of `1+exp(x)` (`x > 33.3`)',
 
 tape( 'the function accurately computes the natural logarithm of `1+exp(x)`', opts, function test( t ) {
 	var actual;
-	var delta;
-	var tol;
 	var i;
 
 	for ( i = 0; i < data.length; i++ ) {
 		actual = log1pexp( data[ i ] );
 		if ( actual === expected[ i ] ) {
 			t.strictEqual( actual, expected[ i ], 'returns '+actual+' when provided ' + data[ i ]);
 		} else {
-			delta = abs( actual - expected[ i ] );
-			tol = 85.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. x: '+data[ i ]+'. actual: '+actual+'. expected: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
+			t.strictEqual( isAlmostSameValue( actual, expected[ i ], 2 ), true, 'returns expected value' );
 		}
 	}
 	t.end();