test: add test case for accessor array buffers

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/ctor/test/test.js

@@ -27,6 +27,7 @@ var Uint8Array = require( '@stdlib/array/uint8' );
 var Complex64Array = require( '@stdlib/array/complex64' );
 var Complex128Array = require( '@stdlib/array/complex128' );
 var BooleanArray = require( '@stdlib/array/bool' );
+var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
 var Complex64 = require( '@stdlib/complex/float32/ctor' );
 var Complex128 = require( '@stdlib/complex/float64/ctor' );
 var hasOwnProp = require( '@stdlib/assert/has-own-property' );
@@ -3508,6 +3509,37 @@ tape( 'an ndarray has a custom `toString()` method (boolean type)', function tes
 	t.end();
 });
 
+tape( 'an ndarray has a custom `toString()` method (underlying accessor array)', function test( t ) {
+	var expected;
+	var strides;
+	var actual;
+	var buffer;
+	var offset;
+	var dtype;
+	var order;
+	var shape;
+	var arr;
+
+	dtype = 'generic';
+	buffer = toAccessorArray( [ 1, 0, 1, 0 ] );
+	shape = [ 2, 2 ];
+	order = 'row-major';
+	strides = [ 2, 1 ];
+	offset = 0;
+
+	arr = ndarray( dtype, buffer, shape, strides, offset, order );
+
+	t.strictEqual( hasOwnProp( arr, 'toString' ), false, 'does not have own property' );
+	t.strictEqual( hasProp( arr, 'toString' ), true, 'has property' );
+	t.strictEqual( isFunction( arr.toString ), true, 'has method' );
+
+	expected = 'ndarray( \'generic\', [ 1, 0, 1, 0 ], [ 2, 2 ], [ 2, 1 ], 0, \'row-major\' )';
+	actual = arr.toString();
+	t.strictEqual( actual, expected, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'an ndarray has a custom `toString()` method (0d)', function test( t ) {
 	var expected;
 	var strides;