npm and error messages

node_modules/es5-ext/test/object/ensure-plain-function.js

@@ -0,0 +1,14 @@
+"use strict";
+
+module.exports = function (t, a) {
+	// Just sanity checks, as logic is tested at isPlainFunction
+	var fn = function () {};
+	a(t(fn), fn, "Function");
+	a.throws(
+		function () {
+			t({});
+		},
+		TypeError,
+		"Error"
+	);
+};