add test

Author: rtritto

packages/commonjs/test/fixtures/samples/named-cjs-exports/main.cjs

@@ -0,0 +1,4 @@
+exports.$Enums = {};
+exports.AccessLevel = exports.$Enums.AccessLevel = {
+  TEST: 'TEST',
+};

packages/commonjs/test/test.js

@@ -289,6 +289,16 @@ test('import CommonJS module with esm property should get default export ', asyn
   t.is(result2.error.message, 'libExports is not a function');
 });
 
+test('test named exports from cjs', async (t) => {
+  const bundle = await rollup({
+    input: 'fixtures/samples/named-cjs-exports/main.cjs',
+    plugins: [commonjs()]
+  });
+
+  t.plan(3);
+  await testBundle(t, bundle);
+});
+
 test('identifies named exports from object literals', async (t) => {
   const bundle = await rollup({
     input: 'fixtures/samples/named-exports-from-object-literal/main.js',