test: update test case

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

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

@@ -21,7 +21,7 @@
 // MODULES //
 
 var tape = require( 'tape' );
-var abs = require( '@stdlib/math/base/special/abs' );
+var f16 = require( '@stdlib/number/float64/base/to-float16' );
 var sqrt = require( '@stdlib/math/base/special/sqrt' );
 var FLOAT16_SQRT_HALF = require( './../lib' );
 
@@ -39,10 +39,7 @@ tape( 'the exported value is a half-precision floating-point number equal to 0.7
 	t.end();
 });
 
-tape( 'the exported value is close to sqrt(0.5) within float16 precision', function test( t ) {
-	var expected = sqrt( 0.5 );
-	var delta = abs( FLOAT16_SQRT_HALF - expected );
-	var tol = 1.0e-3; // float16 tolerance
-	t.ok( delta <= tol, 'within tolerance. expected: '+expected+'. actual: '+FLOAT16_SQRT_HALF+'. delta: '+delta+'. tol: '+tol+'.' );
+tape( 'the exported value is equal to sqrt(0.5) within half-precision', function test( t ) {
+	t.strictEqual( FLOAT16_SQRT_HALF, f16( sqrt( 0.5 ) ), 'returns expected value' );
 	t.end();
 });