No way to use custom mocha ui

Currently it’s impossible to use custom mocha ui. What I want is extra config option which allow to specify which files I want to load before bootstraping mocha (before adapter.js)

var initMocha = function (files, mochaConfig) {
  var mochaPath = path.dirname(require.resolve('mocha'))
  files.unshift(createPattern(__dirname + '/adapter.js'))
  // HERE: I want to iterate over config.mochaFiles and add them right after mocha.js
  files.unshift(createPattern(mochaPath + '/mocha.js'))

  if (mochaConfig && mochaConfig.reporter) {
    files.unshift(createPattern(mochaPath + '/mocha.css'))
  }
}

[christian-schulze]

@stalniy I’ve had some success getting your https://github.com/stalniy/bdd-lazy-var mocha ui to work by making the following changes to lib/index.js#initMocha:

var initMocha = function (files, mochaConfig) {
  var mochaPath = path.dirname(require.resolve('mocha'))
  var bddLazyVarPath = path.dirname(require.resolve('bdd-lazy-var'))
  files.unshift(createPattern(path.join(__dirname, 'adapter.js')))
  files.unshift(createPattern(path.join(bddLazyVarPath, 'bdd_lazy_var_global.js')))
  files.unshift(createPattern(path.join(mochaPath, 'mocha.js')))

  if (mochaConfig && mochaConfig.reporter) {
    files.unshift(createPattern(path.join(mochaPath, 'mocha.css')))
  }
}

I’ve generalised this solution, by using @dtothefp idea of a require array:

client: {
  mocha: {
    ui: 'my-ui',
    require: [ require.resolve('bdd-lazy-var/bdd_lazy_var_global') ]
  }
}

lib/index.js#initMocha

var initMocha = function (files, mochaConfig) {
  files.unshift(createPattern(path.join(__dirname, 'adapter.js')))

  if (mochaConfig.require) {
    for (var requirePath of mochaConfig.require) {
      files.unshift(createPattern(requirePath));
    }
  }

  var mochaPath = path.dirname(require.resolve('mocha'))
  files.unshift(createPattern(path.join(mochaPath, 'mocha.js')))

  if (mochaConfig && mochaConfig.reporter) {
    files.unshift(createPattern(path.join(mochaPath, 'mocha.css')))
  }
}

Also need to exclude the require array from being sent to mocha in the adapter. Will throw a PR together asap.

[dtothefp]

Think this is related but it would be nice to have a require option similar to gulp-mocha where we could hook into the --require functionality.

ex.

client: {
  mocha: {
    ui: 'my-ui',
    require: [ path.join(__dirname, 'some-script.js') ]
  }
}

Specifically this would be useful for me to do something like https://labnotes.org/yield-to-the-test-using-mocha-with-es6-generators/ where you could hook into something like mocha.Runnable.prototype.run before instantiation