take into consideration default export specifiers in common module formatter - fixes #1071

src/babel/transformation/modules/_default.js

@@ -63,7 +63,7 @@ var exportsVisitor = traverse.explode({
       }
 
       if (!t.isExportDefaultDeclaration(node)) {
-        var onlyDefault = node.specifiers && t.isExportDefaultSpecifier(node.specifiers[0]) && node.specifiers.length === 1;
+        var onlyDefault = node.specifiers && node.specifiers.length === 1 && t.isSpecifierDefault(node.specifiers[0]);
         if (!onlyDefault) {
           formatter.hasNonDefaultExports = true;
         }

src/babel/transformation/modules/amd.js

@@ -91,6 +91,10 @@ export default class AMDFormatter extends DefaultFormatter {
     ]));
   }
 
+  exportSpecifier() {
+    CommonFormatter.prototype.exportSpecifier.apply(this, arguments);
+  }
+
   exportDeclaration(node) {
     if (this.doDefaultExportInterop(node)) {
       this.passModuleArg = true;

test/core/fixtures/transformation/es6.modules-amd/exports-default/actual.js

@@ -6,3 +6,4 @@ export default function () {}
 export default class {}
 export default function foo () {}
 export default class Foo {}
+export { foo as default };

test/core/fixtures/transformation/es6.modules-amd/exports-default/expected.js

@@ -28,4 +28,5 @@ define(["exports", "module"], function (exports, module) {
   };
 
   module.exports = Foo;
+  module.exports = foo;
 });

test/core/fixtures/transformation/es6.modules-common/exports-default/actual.js

@@ -6,3 +6,4 @@ export default function () {}
 export default class {}
 export default function foo () {}
 export default class Foo {}
+export { foo as default };

test/core/fixtures/transformation/es6.modules-common/exports-default/expected.js

@@ -27,3 +27,4 @@ var Foo = function Foo() {
 };
 
 module.exports = Foo;
+module.exports = foo;

test/core/fixtures/transformation/es6.modules-umd/exports-default/actual.js

@@ -6,3 +6,4 @@ export default function () {}
 export default class {}
 export default function foo () {}
 export default class Foo {}
+export { foo as default };

test/core/fixtures/transformation/es6.modules-umd/exports-default/expected.js

@@ -34,4 +34,5 @@
   };
 
   module.exports = Foo;
+  module.exports = foo;
 });