example mocha with custom args

package.json

{
  	"name": "test"
	, "version": "0.0.1"
	, "description": "mocha"
	, "keywords": ["test", "tutorial"]
	, "author": "skw"
	, "main": "index"
	, "engines": { "node": "*" }
	, "scripts": {
		"test": "make test"
	}
	, "devDependencies": {
		"mocha": "*",
		"optimist": "*",
		"xunit-file": "*",
		"lodash": "*"
	}
}

test->config.json

{
  "url": "http://dev-catalyst.viso.tv/"
}

test->example.js

// deps
...

// grab options
var options = require( './config.json' );

// tests
describe('do stuff with config.url', function() {
  //...
});

test.js

/*
  example mocha with custom args
  
  // pass url with
  // ``` $ test --url http://dev-catalyst.viso.tv/ ```
  
  see: https://github.com/visionmedia/mocha/wiki/Using-mocha-programmatically
*/

var Mocha = require('mocha'),
    fs = require('fs'),
    path = require('path'),
    optimist = require( 'optimist' ),
    _ = require( 'lodash' ),
    defaults;

// check default config
if( fs.existsSync( __dirname + '/test/_config.json' )){
  defaults = require( __dirname + 'test/_config.json' );
} else {
  process.exit( 1 );
}

var options = _.clone( defaults );

// check for arg
if( typeof optimist.argv.url !== 'undefined' ){
  options.url = optimist.argv.url;
} 

// write file config.json
fs.writeFileSync(
  __dirname + '/test/config.json',
  JSON.stringify( options ) //think this needs to be parsed but require auto parses
);

// do mocha stuff, could drop options into json file or args

var mocha = new Mocha({
  // options
  ui: 'bdd'
});

fs.readdirSync( __dirname + '/test' ).filter( function( file ){
    // Only keep the .js files
    return file.substr( -3 ) === '.js';
}).forEach( function( file ){
    // Use the method "addFile" to add the file to mocha
    mocha.addFile(
        path.join( __dirname + '/test', file )
    );
});

// Now, you can run the tests.
mocha.run( function( failures ){
  process.on( 'exit', function () {
    process.exit( failures );
  });
});