feat: support SpreadElement

package.json

@@ -10,11 +10,13 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "babel-core": "^6.26.0"
+    "babel-core": "^6.26.0",
+    "babel-plugin-transform-object-rest-spread": "^6.26.0"
   },
   "devDependencies": {
     "@types/babel-core": "^6.25.3",
     "@types/node": "^9.4.6",
+    "ava": "^0.25.0",
     "typescript": "^2.7.2"
   }
 }

src/evaluate.ts

@@ -7,7 +7,8 @@ import {
   _classCallCheck,
   _createClass,
   _possibleConstructorReturn,
-  _inherits
+  _inherits,
+  _extends
 } from "./runtime";
 
 const BREAK_SINGAL: {} = {};
@@ -647,6 +648,9 @@ const evaluate_map = {
   },
   Super(node: types.Super, scope: Scope) {
     return function() {};
+  },
+  SpreadElement(node: types.SpreadElement, scope: Scope) {
+    return evaluate(node.argument, scope);
   }
 };
 

src/runtime.ts

@@ -50,4 +50,18 @@ export function _inherits(subClass, superClass) {
     Object.setPrototypeOf
       ? Object.setPrototypeOf(subClass, superClass)
       : (subClass.__proto__ = superClass);
-}
+}
+
+export const _extends =
+  Object.assign ||
+  function(target) {
+    for (var i = 1; i < arguments.length; i++) {
+      var source = arguments[i];
+      for (var key in source) {
+        if (Object.prototype.hasOwnProperty.call(source, key)) {
+          target[key] = source[key];
+        }
+      }
+    }
+    return target;
+  };

src/vm.ts

@@ -24,7 +24,9 @@ class Vm {
     scope.$const("module", $module);
     scope.$const("exports", $exports);
 
-    const {ast} = transform(code);
+    const {ast} = transform(code, {
+      plugins: ["transform-object-rest-spread"]
+    });
 
     ast && evaluate(ast, scope);
 

test/SpreadElement.test.ts

@@ -0,0 +1,48 @@
+import test from "ava";
+import * as fs from "fs";
+
+import vm from "../src/vm";
+
+test("SpreadElement-1", t => {
+  const sandbox: any = vm.createContext({});
+
+  const obj: any = vm.runInContext(
+    `
+const obj = {
+  isTrue: false
+};
+
+module.exports = {...obj};
+  `,
+    sandbox
+  );
+
+  t.true(typeof obj.isTrue === "boolean");
+  t.false(obj.isTrue);
+});
+
+test("SpreadElement-2", t => {
+  const sandbox: any = vm.createContext({});
+
+  const obj: any = vm.runInContext(
+    `
+const obj1 = {
+  1: true,
+  2: false
+};
+
+const obj2 = {
+  1: false,
+  2: true,
+  name: "hello"
+};
+
+module.exports = {...obj1, ...obj2};
+  `,
+    sandbox
+  );
+
+  t.false(obj[1]);
+  t.true(obj[2]);
+  t.deepEqual(obj.name, "hello");
+});

yarn.lock

@@ -484,7 +484,7 @@ babel-plugin-syntax-exponentiation-operator@^6.8.0:
   version "6.13.0"
   resolved "https://registry.npmjs.org/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz#9ee7e8337290da95288201a6a57f4170317830de"
 
-babel-plugin-syntax-object-rest-spread@^6.13.0:
+babel-plugin-syntax-object-rest-spread@^6.13.0, babel-plugin-syntax-object-rest-spread@^6.8.0:
   version "6.13.0"
   resolved "https://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
 
@@ -564,6 +564,13 @@ babel-plugin-transform-exponentiation-operator@^6.8.0:
     babel-plugin-syntax-exponentiation-operator "^6.8.0"
     babel-runtime "^6.22.0"
 
+babel-plugin-transform-object-rest-spread@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.npmjs.org/babel-plugin-transform-object-rest-spread/-/babel-plugin-transform-object-rest-spread-6.26.0.tgz#0f36692d50fef6b7e2d4b3ac1478137a963b7b06"
+  dependencies:
+    babel-plugin-syntax-object-rest-spread "^6.8.0"
+    babel-runtime "^6.26.0"
+
 babel-plugin-transform-strict-mode@^6.24.1:
   version "6.24.1"
   resolved "https://registry.npmjs.org/babel-plugin-transform-strict-mode/-/babel-plugin-transform-strict-mode-6.24.1.tgz#d5faf7aa578a65bbe591cf5edae04a0c67020758"