From e8d736f0fd847f39a46b5774af882c9a8313fbc4 Mon Sep 17 00:00:00 2001
From: peterhpchen <peterhsinpingchen@gmail.com>
Date: Wed, 20 Jan 2021 14:45:10 +0800
Subject: [PATCH] fix: transform commonjs

---
 src/core.js                                  |  2 +-
 test/fixtures/transform-commonjs/actual.js   |  7 +++++++
 test/fixtures/transform-commonjs/expected.js | 19 +++++++++++++++++++
 test/index-test.js                           |  7 +++++++
 4 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 test/fixtures/transform-commonjs/actual.js
 create mode 100644 test/fixtures/transform-commonjs/expected.js

diff --git a/src/core.js b/src/core.js
index 584f7c07..7421043f 100644
--- a/src/core.js
+++ b/src/core.js
@@ -121,7 +121,7 @@ module.exports = function core(defaultLibraryName) {
           }
         }
       }
-      return selectedMethods[methodName];
+      return Object.assign({}, selectedMethods[methodName]);
     }
 
     function buildExpressionHandler(node, props, path, state) {
diff --git a/test/fixtures/transform-commonjs/actual.js b/test/fixtures/transform-commonjs/actual.js
new file mode 100644
index 00000000..6adcdf87
--- /dev/null
+++ b/test/fixtures/transform-commonjs/actual.js
@@ -0,0 +1,7 @@
+import { Button } from 'element-ui';
+
+export default {
+  components: {
+    [Button.name]: Button
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/transform-commonjs/expected.js b/test/fixtures/transform-commonjs/expected.js
new file mode 100644
index 00000000..cbc9b6bb
--- /dev/null
+++ b/test/fixtures/transform-commonjs/expected.js
@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+require("element-ui/lib/button/style.css");
+
+var _button = _interopRequireDefault(require("element-ui/lib/button"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+var _default = {
+  components: _defineProperty({}, _button.default.name, _button.default)
+};
+exports.default = _default;
\ No newline at end of file
diff --git a/test/index-test.js b/test/index-test.js
index 0ed00348..21e66354 100644
--- a/test/index-test.js
+++ b/test/index-test.js
@@ -133,6 +133,13 @@ describe('index', () => {
         }];
       }
 
+      if (caseName === 'transform-commonjs') {
+        cssPlugin = [
+          [plugin], 
+          ['@babel/plugin-transform-modules-commonjs']
+        ];
+      }
+
       const actual = transformFileSync(actualFile, {
         presets: ['@babel/react'],
         plugins: cssPlugin && Array.isArray(cssPlugin[1]) ? cssPlugin : [cssPlugin || plugin],