No coverage information was collected, exit without writing coverage information

[Negaihoshi]

I try to use grunt-mocha-istanbul, but it always show me "No coverage information was collected, exit without writing coverage information".

my grunt config

module.exports = (grunt) ->
  grunt.config.set 'mocha_istanbul',
  coverage:
    src: 'test/controllers/'
    options:
      coverageFolder: 'coverage'
      root: 'api/'
  grunt.loadNpmTasks 'grunt-mocha-istanbul'
  return

project use sails.

[pocesar]

what version of mocha and istanbul are you using? are you executing the tests using coffeescript? or trying to coverage .coffee files?

also, are you forking a process? if so, you need to set istanbulOptions: ['--hook-run-in-context']

also, is there anything in the coverage folder?

[Negaihoshi]

I use mocha 1.18.2, istanbul 0.3.17.
I try to use new config with mocha 2.2.5, following:

module.exports = (grunt) ->
  grunt.config.set 'mocha_istanbul',
  coverage:
    src: 'test/controllers/'
    options:
      coverageFolder: 'coverage'
      istanbulOptions: ['--hook-run-in-context']
      mask: '**/*.spec.coffee'
      root: 'api/'
  grunt.loadNpmTasks 'grunt-mocha-istanbul'
  return

but coverage folder also is empty.
Result also is "No coverage information was collected, exit without writing coverage information".

[pocesar]

istanbul can't instrument .coffee files by default, for that you need to use ibrik.

set your scriptPath to the ibrik command line bin, like:

options:
    scriptPath: require.resolve('ibrik/bin/ibrik')
    mochaOptions: ['--compilers coffee:coffee-script/register']

[Negaihoshi]

I try to use ibrik, But it not work too.
I new a project to try this issue.

https://github.com/Negaihoshi/sails-starter-toolkit/blob/master/tasks/config/mocha_istanbul.coffee

[pocesar]

well, there are no controllers in your project, it can't generate coverage from it, or did you create that repo just to show the task file?

you could try setting

options: 
    recursive: true

[Negaihoshi]

sorry, I forgot add controller action in the project.
I add controller action now.

I fallow this website to setting my project.
http://thenullpointer.in/2014/09/08/Testing-and-code-coverage-using-grunt-mocha-istanbul-in-Sails-js/index.html

And it not work too.
https://github.com/Negaihoshi/sails-starter-toolkit/blob/master/tasks/config/mocha_istanbul.coffee

[pocesar]

it should be

module.exports = (grunt) ->
  grunt.config.set 'mocha_istanbul',
  coverage:
    src: 'test'
    options:
      coverageFolder: 'coverage'
      recursive: true
      istanbulOptions: ['--hook-run-in-context']
      scriptPath: require.resolve('/Users/negaihoshi/.nvm/versions/io.js/v1.8.1/bin/ibrik') # line changed
      mask: '**/*.spec.coffee'
      root: 'api/'
  grunt.loadNpmTasks 'grunt-mocha-istanbul'
  return

also, is the bootstrap.test.coffee being called prior to the task execution? is it needed?

[pocesar]

reopen if needed