add a test case to test both nodejs and es6 format

Author: bobzhang

jscomp/test/build.ninja

@@ -168,6 +168,8 @@ o test/epsilon_test.cmi test/epsilon_test.cmj : cc test/epsilon_test.ml | test/m
 o test/equal_box_test.cmi test/equal_box_test.cmj : cc test/equal_box_test.ml | test/mt.cmj $stdlib
 o test/equal_exception_test.cmi test/equal_exception_test.cmj : cc test/equal_exception_test.ml | test/mt.cmj $stdlib
 o test/equal_test.cmi test/equal_test.cmj : cc test/equal_test.ml | $stdlib
+o test/es6_export.cmi test/es6_export.cmj : cc test/es6_export.ml | $stdlib
+o test/es6_import.cmi test/es6_import.cmj : cc test/es6_import.ml | test/es6_export.cmj $stdlib
 o test/es6_module_test.cmi test/es6_module_test.cmj : cc test/es6_module_test.ml | test/mt.cmj $stdlib
 o test/escape_esmodule.cmi test/escape_esmodule.cmj : cc test/escape_esmodule.ml | $stdlib
 o test/esmodule_ref.cmi test/esmodule_ref.cmj : cc test/esmodule_ref.ml | test/escape_esmodule.cmj $stdlib

jscomp/test/es6_export.js

@@ -0,0 +1,9 @@
+'use strict';
+
+
+var $$default = 3;
+
+exports.$$default = $$default;
+exports.default = $$default;
+exports.__esModule = true;
+/* No side effect */

jscomp/test/es6_export.mjs

@@ -0,0 +1,11 @@
+
+
+
+var $$default = 3;
+
+export {
+  $$default ,
+  $$default as default,
+  
+}
+/* No side effect */

jscomp/test/es6_export.ml

@@ -0,0 +1,2 @@
+[@@@config{flags = [|"-bs-package-output"; "es6:jscomp/test:.mjs"|]}]
+let default = 3

jscomp/test/es6_import.js

@@ -0,0 +1,7 @@
+'use strict';
+
+var Es6_export = require("./es6_export.js");
+
+console.log(Es6_export.$$default);
+
+/*  Not a pure module */

jscomp/test/es6_import.mjs

@@ -0,0 +1,10 @@
+
+
+import * as Es6_export from "./es6_export.mjs";
+
+console.log(Es6_export.$$default);
+
+export {
+  
+}
+/*  Not a pure module */

jscomp/test/es6_import.ml

@@ -0,0 +1,2 @@
+[@@@config{flags = [|"-bs-package-output"; "es6:jscomp/test:.mjs"|]}]
+;; Js.log (Es6_export.default)