Add @babel/traverse tests for re-exported bindings (#12429)

packages/babel-traverse/test/fixtures/rename/re-export/input.mjs

@@ -0,0 +1,7 @@
+// https://github.com/babel/babel/issues/9266
+
+export function x() {
+  return "YES";
+}
+
+export { x as someFunction } from './lib2.js'

packages/babel-traverse/test/fixtures/rename/re-export/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-traverse/test/fixtures/rename/re-export/output.mjs

@@ -0,0 +1,7 @@
+// https://github.com/babel/babel/issues/9266
+function a() {
+  return "YES";
+}
+
+export { a as x };
+export { x as someFunction } from './lib2.js';

packages/babel-traverse/test/fixtures/rename/re-export/plugin.js

@@ -0,0 +1,9 @@
+module.exports = function() {
+  return {
+    visitor: {
+      Function(path) {
+        path.scope.rename("x", "a");
+      }
+    }
+  };
+}

packages/babel-traverse/test/scope.js

@@ -351,6 +351,13 @@ describe("scope", () => {
 
       expect(path.scope.generateUid("Cls")).toBe("_Cls2");
     });
+
+    it("re-exports are not references", () => {
+      const path = getPath("export { x } from 'y'", {
+        sourceType: "module",
+      });
+      expect(path.scope.hasGlobal("x")).toBe(false);
+    });
   });
 
   describe("duplicate bindings", () => {