test: add test case

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/gapxsumpw/test/test.ndarray.js

@@ -232,6 +232,18 @@ tape( 'if provided a `stride` parameter equal to `0`, the function returns the f
 	t.end();
 });
 
+tape( 'if provided a `stride` parameter equal to `0`, the function returns the first element plus a constant repeated N times (accessors)', function test( t ) {
+	var x;
+	var v;
+
+	x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
+
+	v = gapxsumpw( x.length, 5.0, toAccessorArray( x ), 0, 0 );
+	t.strictEqual( v, x.length * (x[0]+5.0), 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function supports an `offset` parameter', function test( t ) {
 	var x;
 	var v;