fix es6 visitor keys

test/fixtures/modules/exports-default/expected.js

@@ -1,8 +1,22 @@
 module.exports = exports = 42;
 module.exports = exports = {};
+
 module.exports = exports = [];
+
 module.exports = exports = foo;
+
 module.exports = exports = function () {}
-module.exports = exports = class {}
+
+module.exports = exports = function () {
+  function Anonymous() {
+  }
+  return Anonymous;
+}();
+
 module.exports = exports = function foo () {}
-module.exports = exports = class foo {}
+
+module.exports = exports = function () {
+  function foo() {
+  }
+  return foo;
+}();

test/fixtures/modules/exports-variable/actual.js

@@ -1,8 +1,8 @@
 export var foo = 1;
-export var foo = function () {};
-export var bar;
-export let foo = 2;
-export let bar;
-export const foo = 3;
-export function foo () {}
-export class foo {}
+export var foo2 = function () {};
+export var foo3;
+export let foo4 = 2;
+export let foo5;
+export const foo6 = 3;
+export function foo7 () {}
+export class foo8 {}

test/fixtures/modules/exports-variable/expected.js

@@ -1,23 +1,32 @@
-var foo = 1;
-exports.foo = foo;
+var foo;
+var foo2;
+var foo3;
+var foo8;
+(function () {
+  foo = 1;
+  exports.foo = foo;
 
-var foo = function () {};
-exports.foo = foo;
+  foo2 = function () {};
+  exports.foo2 = foo2;
 
-var bar;
-exports.bar = bar;
+  exports.foo3 = foo3;
 
-let foo = 2;
-exports.foo = foo;
+  var foo4 = 2;
+  exports.foo4 = foo4;
 
-let bar;
-exports.bar = bar;
+  var foo5;
+  exports.foo5 = foo5;
 
-const foo = 3;
-exports.foo = foo;
+  var foo6 = 3;
+  exports.foo6 = foo6;
 
-function foo () {}
-exports.foo = foo;
+  function foo7 () {}
+  exports.foo7 = foo7;
 
-class foo {}
-exports.foo = foo;
+  foo8 = function () {
+    function foo8() {
+    }
+    return foo8;
+  }();
+  exports.foo8 = foo8;
+}());