Detox: demo-react-native : SyntaxError: Unexpected token (

[lc3t35]

There is some babel problems with demo-react-native :
````
detox test --configuration ios.sim.release
node_modules/.bin/mocha e2e --opts e2e/mocha.opts --configuration ios.sim.release
/Users/laurent/dev/react-native/detox/examples/demo-react-native/e2e/example.spec.js:2
beforeEach(async () => {
^
SyntaxError: Unexpected token (
at Object.exports.runInThisContext (vm.js:76:16)
at Module._compile (module.js:528:28)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at /Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/mocha.js:230:27
at Array.forEach (native)
at Mocha.loadFiles (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/mocha.js:227:14)
at Mocha.run (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/mocha.js:495:10)
at Object. (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/bin/_mocha:460:18)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.runMain (module.js:590:10)
at run (bootstrap_node.js:394:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:509:3
child_process.js:526
throw err;
^

Error: Command failed: node_modules/.bin/mocha e2e --opts e2e/mocha.opts --configuration ios.sim.release
at checkExecSyncError (child_process.js:483:13)
at Object.execSync (child_process.js:523:13)
at Object. (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/detox/local-cli/detox-test.js:34:4)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.runMain (module.js:590:10)
at run (bootstrap_node.js:394:7)
I was able to fix this with a .babelrc file and adding --compilers js:babel-core/register in mocha.opts
{
"presets": [ "latest" ]
}
But now I have the following error
detox test --configuration ios.sim.release
node_modules/.bin/mocha e2e --opts e2e/mocha.opts --configuration ios.sim.release
/Users/laurent/dev/react-native/detox/examples/demo-react-native/e2e/example.spec.js:6
beforeEach(_asyncToGenerator(regeneratorRuntime.mark(function _callee() {
^

ReferenceError: regeneratorRuntime is not defined
at Suite. (/Users/laurent/dev/react-native/detox/examples/demo-react-native/e2e/example.spec.js:2:3)
at Object.create (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/interfaces/common.js:114:19)
at context.describe.context.context (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/interfaces/bdd.js:44:27)
at Object. (/Users/laurent/dev/react-native/detox/examples/demo-react-native/e2e/example.spec.js:1:1)
at Module._compile (module.js:556:32)
at loader (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/babel-register/lib/node.js:154:7)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at /Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/mocha.js:230:27
at Array.forEach (native)
at Mocha.loadFiles (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/mocha.js:227:14)
at Mocha.run (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/lib/mocha.js:495:10)
at Object. (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/mocha/bin/_mocha:460:18)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.runMain (module.js:590:10)
at run (bootstrap_node.js:394:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:509:3
child_process.js:526
throw err;
^

Error: Command failed: node_modules/.bin/mocha e2e --opts e2e/mocha.opts --configuration ios.sim.release
at checkExecSyncError (child_process.js:483:13)
at Object.execSync (child_process.js:523:13)
at Object. (/Users/laurent/dev/react-native/detox/examples/demo-react-native/node_modules/detox/local-cli/detox-test.js:34:4)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.runMain (module.js:590:10)
at run (bootstrap_node.js:394:7)
Thank to http://stackoverflow.com/questions/33527653/babel-6-regeneratorruntime-is-not-defined-with-async-await, I modified mocha.opts
--recursive
--timeout 120000
--bail
--compilers js:babel-core/register
--require babel-polyfill
````
This fixes the issue

For information :
````
npm ls --depth 0
[email protected] /Users/laurent/dev/react-native/detox/examples/demo-react-native
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── UNMET PEER DEPENDENCY [email protected]
└── [email protected]

npm ERR! peer dep missing: react@~15.4.0-rc.4, required by [email protected]
package.json
"devDependencies": {
"babel-polyfill": "^6.23.0",
"babel-preset-latest": "^6.24.1",
"detox": "^5.0.0",
"mocha": "^3.2.0"
},
````

[rotemmiz]

Hi there, I just added a clarification here https://github.com/wix/detox/commit/bcf540391f23c34d9ee9af8f27b41f4f5c5b068f

Personally I prefer not to babel my tests, and since node 7.6.0 supports async-await there is no need to. It makes it much easier and saves lots of boilerplate configuration.

[rotemmiz]

Did not intend to close the issue, reopening. feel free to close it if it solves your problem.

[lc3t35]

Works fine with node 7.6.0 (installed with "n 7.6.0")
thank you.

[Monte9]

Upgrading my node version fixed this for me. Was running v7.1.0 and upgraded to v0.8.0

The easiest way to do this is using nvm. Here's how to upgrade