test() does not support -w and -x options

[dundalek]

These are sometimes useful and are not supported as of latest shelljs (v0.7.8):

• -w file exists and write permission is granted
• -x file exists and execute permission is granted

Usage:

require('shelljs').test('-x', '/bin/bash')
// => test: option not recognized: x

It can be implemented using fs.accessSync. Would you be interested in a PR?

[nfischer]

@dundalek that approach SGTM as long as we can support Windows. We unfortunately had to drop a lot of chmod support because Windows handles modes very differently. Take a look at test/chmod.js for all the skipOnWin tests.

Feel free to send a PR with tests. Appveyor will verify if the feature works for Windows.

[dundalek]

Yeah, good point. It would do nothing on windows, nevermind.

[nfischer]

Maybe -w is ok? It seems to be allowed on Windows.