Using with amdefine.

[tbranyen]

Is it possible to use Istanbul with Mocha and amdefine?

When I run the tests I see something like this:

$ npm run mocha

> [email protected] mocha /home/tim/git/my-module
> istanbul cover _mocha -- -r test/runner test/tests/**


  ․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․
  ․․․․․․․․․

  71 passing (38ms)

No coverage information was collected, exit without writing coverage information

The script command in package.json is:

  "scripts": {
    "mocha": "istanbul cover _mocha -- -r test/runner test/tests/**"
  }

[Raynos]

depends on what your code looks like.

Istanbul does instrumentation by hooking into require via require.extensions

It also hooks into various vm methods.

if amdefine hooks into module directly or spawns child processes or overwrites require.extensions['.js'] then it wont work

[tbranyen]

Amdefine works by hooking into require.extensions.

It should be possible then to either modify amdefine or istanbul to handle the case where an extension override is already set.

[Raynos]

it will need to be a change to amdefine as it overwrites the istanbul require extensions.