running "ng test" fails with error "EMFILE: too many open files"

[girishla]

1. OS? Windows 7, 8 or 10. Linux (which distribution). Mac OSX (Yosemite? El Capitan?)
   Windows 7
2. Versions. Please run ng --version. If there's nothing outputted, please
   run in a Terminal:
   node --version
   angular-cli: 1.0.0-beta.5
   node: 4.4.2
   os: win32 x64
3. Repro steps. Was this an app that wasn't created using the CLI? What change did you
   do on your code? etc.

vanilla app created using cli. No customisations.,

1. The log given by the failure. Normally this include a stack trace and some
   more information.

Error: EMFILE: too many open files, open 'C:\working\esl\node_modules@angular\core\src\di.d.ts'
at Error (native)
at Object.fs.openSync (fs.js:549:18)
at Object.fs.readFileSync (fs.js:397:15)
at CustomLanguageServiceHost.getScriptSnapshot (C:\working\esl\node_modules\angular-cli\lib\broccoli\broccoli-typescript.js:392:44)
at HostCache.createEntry (C:\working\esl\node_modules\typescript\lib\typescript.js:48033:44)
at HostCache.getOrCreateEntry (C:\working\esl\node_modules\typescript\lib\typescript.js:48056:25)
at Object.getOrCreateSourceFile as getSourceFile
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40307:29)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)
at processImportedModules (C:\working\esl\node_modules\typescript\lib\typescript.js:40388:44)
at findSourceFile (C:\working\esl\node_modules\typescript\lib\typescript.js:40352:17)

The broccoli plugin was instantiated at:
at BroccoliTypeScriptCompiler.Plugin (C:\working\esl\node_modules\angular-cli\node_modules\broccoli-caching-writer\node_modules\broccoli-plugin\index.js:10:31)
at BroccoliTypeScriptCompiler.CachingWriter as constructor
at BroccoliTypeScriptCompiler (C:\working\esl\node_modules\angular-cli\lib\broccoli\broccoli-typescript.js:31:10)
at Angular2App._getTsTree (C:\working\esl\node_modules\angular-cli\lib\broccoli\angular2-app.js:321:18)
at Angular2App._buildTree (C:\working\esl\node_modules\angular-cli\lib\broccoli\angular2-app.js:116:23)
at new Angular2App (C:\working\esl\node_modules\angular-cli\lib\broccoli\angular2-app.js:53:23)
at module.exports (C:\working\esl\angular-cli-build.js:6:10)
at Class.module.exports.Task.extend.setupBroccoliBuilder (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\lib\models\builder.js:55:19)
at Class.module.exports.Task.extend.init (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\lib\models\builder.js:89:10)
at new Class (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\node_modules\core-object\core-object.js:18:12)
at Class.module.exports.Task.extend.run (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\lib\tasks\build-watch.js:17:16)
at C:\working\esl\node_modules\angular-cli\addon\ng2\commands\test.js:69:46
at lib$rsvp$$internal$$tryCatch (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\node_modules\rsvp\dist\rsvp.js:1036:16)
at lib$rsvp$$internal$$invokeCallback (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\node_modules\rsvp\dist\rsvp.js:1048:17)
at lib$rsvp$$internal$$publish (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\node_modules\rsvp\dist\rsvp.js:1019:11)
at lib$rsvp$asap$$flush (C:\working\esl\node_modules\angular-cli\node_modules\angular-cli\node_modules\rsvp\dist\rsvp.js:1198:9)

1. Mention any other details that might be useful.

   ---

   Thanks! We'll be in touch soon.

[girishla]

closing as it probably is duplicate of #864

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