test: add test

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

Author: kgryte

lib/node_modules/@stdlib/stats/array/max-by/test/test.js

@@ -220,6 +220,25 @@ tape( 'the function supports providing a callback execution context', function t
 	}
 });
 
+tape( 'the function supports providing a callback execution context (accessors)', function test( t ) {
+	var ctx;
+	var x;
+
+	x = [ 1.0, 2.0, 3.0, 4.0, 5.0 ];
+	ctx = {
+		'count': 0
+	};
+	maxBy( toAccessorArray( x ), accessor, ctx );
+
+	t.strictEqual( ctx.count, x.length, 'returns expected value' );
+	t.end();
+
+	function accessor( v ) {
+		this.count += 1; // eslint-disable-line no-invalid-this
+		return v * 2.0;
+	}
+});
+
 tape( 'if provided an empty array, the function returns `NaN`', function test( t ) {
 	var v = maxBy( [], accessor );
 	t.strictEqual( isnan( v ), true, 'returns expected value' );