UNKNOWN_OPTION could be optional

[flipflopapp]

When I use an app that uses the npm module with mocha (and I want to pass some options to mocha and others to the module being tested), I see an UNKNOWN_OPTION error. For example, I want to pass --no-timeout to mocha.

[flipflopapp]

It requires minor changes

https://github.com/flipflopapp/command-line-args

works for my usecase.

[75lb]

ok, thanks - i had a look at what you did.. I'm considering solutions for handling unknown options but won't be discarding them, as in your case.

Closing as a near-duplicate of #25, which i'm working on as we speak.

[75lb]

btw, is there any reason you can't create a definition for --no-timeout if it's an option your app accepts?

[75lb]

i've almost finished implementing a new feature to allow unknown options.. could you send an example of how your app was failing with mocha please, so i can test it?

[flipflopapp]

(oops late response - missed the mail notifications). I can create a --no-timeouts option in my app but I thought I would have to add options everytime I wanted to pass a new option to mocha. The command line looks like below,

$ mocha test/test-file.js --some_option_for_app --some_option_for_mocha

My nodejs app accepts some parameters from command line arguments. It was failing when it saw arguments that were meant for mocha. Please let me know if I can provide anymore information.

[75lb]

ok, thanks for the example - i understand what you're doing now, thanks.

[75lb]

with the new version of command-line-args, if you have this mocha script:

/* demonstrates use in a mocha test script */
const assert = require('assert')
const commandLineArgs = require('../')

const options = commandLineArgs({ name: 'value', type: Number }, { partial: true })

describe('Array', function () {
  describe('#indexOf()', function () {
    it('should return -1 when the value is not present', function () {
      assert.equal(options.value, [ 1, 2, 3 ].indexOf(4))
    })
  })
})

you can run the script with a command like this and it will not throw a UNKNOWN_OPTION error:

$ mocha --no-colors example/mocha.js --value -1


  Array
    #indexOf()
      ✓ should return -1 when the value is not present


  1 passing (7ms)

options will look like this:

{
  "value": -1,
  "_unknown": [
    "--no-colors",
    "example/mocha.js"
  ]
}

[75lb]

i've released a beta version which implements this feature.. for details, see #25 and let me know your thoughts. Thanks!

[flipflopapp]

Looks perfect. Thanks for the quick turnaround. Cheers