test: migrate constants/float16/ln-half to ULP-based assertions

PR-URL: #16173
Reviewed-by: Athan Reines <kgryte@gmail.com>
Ref: #11352

Author: kgryte

lib/node_modules/@stdlib/constants/float16/ln-half/test/test.js

@@ -22,8 +22,8 @@
 
 var tape = require( 'tape' );
 var lnf = require( '@stdlib/math/base/special/lnf' );
-var absf = require( '@stdlib/math/base/special/absf' );
-var EPS = require( '@stdlib/constants/float16/eps' );
+var isAlmostSameValue = require( '@stdlib/number/float16/base/assert/is-almost-same-value' );
+var float64ToFloat16 = require( '@stdlib/number/float64/base/to-float16' );
 var FLOAT16_LN_HALF = require( './../lib' );
 
 
@@ -41,15 +41,7 @@ tape( 'export is a half-precision floating-point number equal to `-0.693359375`'
 });
 
 tape( 'export equals `lnf(0.5)`', function test( t ) {
-	var delta;
-	var tol;
-	var v;
-
-	v = lnf( 0.5 );
-	delta = absf( v - FLOAT16_LN_HALF );
-	tol = EPS;
-
-	t.ok( delta <= tol, 'equals ln(0.5) within tolerance '+tol );
-
+	var v = float64ToFloat16( lnf( 0.5 ) );
+	t.strictEqual( isAlmostSameValue( v, FLOAT16_LN_HALF, 0 ), true, 'returns expected value' );
 	t.end();
 });