From b5b95f81dc8bd89997987ccdff759cf6ad86fba5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=B2=20Ribaudo?= <nicolo.ribaudo@gmail.com>
Date: Sun, 6 Dec 2020 19:33:21 +0100
Subject: [PATCH] Add `@babel/traverse` tests for re-exported bindings (#12429)

---
 .../test/fixtures/rename/re-export/input.mjs             | 7 +++++++
 .../test/fixtures/rename/re-export/options.json          | 3 +++
 .../test/fixtures/rename/re-export/output.mjs            | 7 +++++++
 .../test/fixtures/rename/re-export/plugin.js             | 9 +++++++++
 packages/babel-traverse/test/scope.js                    | 7 +++++++
 5 files changed, 33 insertions(+)
 create mode 100644 packages/babel-traverse/test/fixtures/rename/re-export/input.mjs
 create mode 100644 packages/babel-traverse/test/fixtures/rename/re-export/options.json
 create mode 100644 packages/babel-traverse/test/fixtures/rename/re-export/output.mjs
 create mode 100644 packages/babel-traverse/test/fixtures/rename/re-export/plugin.js

diff --git a/packages/babel-traverse/test/fixtures/rename/re-export/input.mjs b/packages/babel-traverse/test/fixtures/rename/re-export/input.mjs
new file mode 100644
index 000000000000..fde48c31e2f4
--- /dev/null
+++ b/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'
diff --git a/packages/babel-traverse/test/fixtures/rename/re-export/options.json b/packages/babel-traverse/test/fixtures/rename/re-export/options.json
new file mode 100644
index 000000000000..14af0e5feac8
--- /dev/null
+++ b/packages/babel-traverse/test/fixtures/rename/re-export/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}
diff --git a/packages/babel-traverse/test/fixtures/rename/re-export/output.mjs b/packages/babel-traverse/test/fixtures/rename/re-export/output.mjs
new file mode 100644
index 000000000000..5dd557e07457
--- /dev/null
+++ b/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';
diff --git a/packages/babel-traverse/test/fixtures/rename/re-export/plugin.js b/packages/babel-traverse/test/fixtures/rename/re-export/plugin.js
new file mode 100644
index 000000000000..8ff77a2c5dd2
--- /dev/null
+++ b/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");
+      }
+    }
+  };
+}
diff --git a/packages/babel-traverse/test/scope.js b/packages/babel-traverse/test/scope.js
index 106c9631e647..129609705b71 100644
--- a/packages/babel-traverse/test/scope.js
+++ b/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", () => {