Investigate if object rest works correctly in tests on master

[gaearon]

I want to hold off releasing 0.7.0 until we figure out if this is an issue: #892 (comment).

I would appreciate help trying to reproduce this in tests in master, and if it reproduces, a fix. I presume that the fix would include whitelisting destructuring transform regardless of Node version.

[gaearon]

To provide more context:

• We switched to using babel-preset-env for tests only in Disable ES2015 transforms based on node version using babel-preset-env #878
• However apparently spread/rest transform doesn't work without destructuring transform per Make target browsers configurable #892 (comment)
• We need to make sure spread/rest works on Node 6 in tests

[JeffreyATW]

I have Node 6.7.0 installed. Checked out master and created a my-app project. Modified the App.test.js like so:

it('renders without crashing', () => {
  const obj = {
    a: 'a',
    b: 'b',
    c: 'c'
  };

  const { a, ...z } = obj;

  console.log(a);
  console.log(z);

  const div = document.createElement('div');
  ReactDOM.render(<App />, div);
});

Got a SyntaxError:

 FAIL  src/App.test.js
  ● Test suite failed to run

    /Users/jeffreyatw/Documents/repos/create-react-app/testo/src/App.test.js:12
      const { a, ...z } = obj;
                 ^^^
    SyntaxError: Unexpected token ...

      at transformAndBuildScript (node_modules/jest-runtime/build/transform.js:284:10)
      at process._tickCallback (internal/process/next_tick.js:103:7)

[paulyoung]

I imagine this is blocked by babel/babel#4074

[hzoo]

@gaearon will work on fixing it in babel next babel/babel#4755

[hzoo]

Fixed in babel-plugin-transform-object-rest-spread@6.19.0