1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/non262/Function/regress-518103.js b/js/src/tests/non262/Function/regress-518103.js
new file mode 100644
index 0000000000..70bab0d572
--- /dev/null
+++ b/js/src/tests/non262/Function/regress-518103.js
@@ -0,0 +1,27 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var BUGNUMBER = 518103;
+var summary = 'lambda constructor "method" vs. instanceof';
+var actual;
+var expect;
+
+printBugNumber(BUGNUMBER);
+printStatus(summary);
+
+var Y = {widget: {}};
+
+Y.widget.DataSource = function () {};
+Y.widget.DS_JSArray = function (A) { this.data = A; };
+Y.widget.DS_JSArray.prototype = new Y.widget.DataSource();
+
+var J = new Y.widget.DS_JSArray( [ ] );
+
+actual = J instanceof Y.widget.DataSource;
+expect = true;
+
+reportCompare(expect, actual, summary);
+
+printStatus("All tests passed!");