Approach changed, added regression test for gh-969

src/compiler/es-next/index.js

@@ -33,11 +33,11 @@ export default class ESNextCompiler {
     static _getBabelOptions (filename) {
         var { presetStage2, transformRuntime, presetEnv } = loadBabelLibs();
 
-        // NOTE: passPrePreset and complex presets is a workaround for https://github.com/babel/babel/issues/2877
+        // NOTE: "[transformRuntime, { polyfill: false }]" is a workaround for https://github.com/babel/babel/issues/2877
         // Fixes https://github.com/DevExpress/testcafe/issues/969
         return {
             presets:       [presetStage2, presetEnv],
-            plugins:       [transformRuntime],
+            plugins:       [[transformRuntime, { polyfill: false }]],
             filename:      filename,
             sourceMaps:    true,
             retainLines:   true,

test/server/compiler-test.js

@@ -1343,6 +1343,21 @@ describe('Compiler', function () {
                 });
         });
 
+        it('Should successfully compile tests if re-export is used', function () {
+            this.timeout(5000);
+
+            var src      = 'test/server/data/test-suites/regression-gh-969/testfile.js';
+            var compiler = new Compiler([src]);
+
+            return compiler
+                .getTests()
+                .then(function (tests) {
+                    var test = tests[0];
+
+                    return test.fn(testRunMock);
+                });
+        });
+
         it('Incorrect callsite stack in error report if "import" is used (GH-1226)', function () {
             this.timeout(5000);
 

test/server/data/test-suites/regression-gh-969/helpers/consts.js

@@ -0,0 +1 @@
+export const FOO = 42;

test/server/data/test-suites/regression-gh-969/helpers/module.js

@@ -0,0 +1 @@
+export * from './consts'

test/server/data/test-suites/regression-gh-969/testfile.js

@@ -0,0 +1,8 @@
+import { expect } from 'chai';
+import * as app from './helpers/module.js';
+
+fixture('Export Issue');
+
+test('re-export', async() => {
+    expect(app.FOO).to.eql(42);
+});