add test for #esperanto/161

test/function/export-from-external/_config.js

@@ -0,0 +1,14 @@
+var assert = require( 'assert' );
+var path = require( 'path' );
+
+module.exports = {
+	description: 'exports directly from an external module',
+	options: {
+		external: [ 'path' ]
+	},
+	exports: function ( exports ) {
+		assert.equal( exports.sep, path.sep );
+	}
+};
+
+// https://github.com/esperantojs/esperanto/issues/161

test/function/export-from-external/main.js

@@ -0,0 +1 @@
+export { sep } from 'path';