Nyc + ava gives 0 on all coverage lines

[ghost]

I followed the steps from https://github.com/avajs/ava/blob/master/docs/recipes/code-coverage.md

My ava config from package.json is

"scripts": {
    "test": "ava",
    "coverage": "nyc ava"
},
"ava": {
    "files": [
      "src/test/**/*.spec.js"
    ],
    "require": [
      "./src/test/_setup-browser-env.js"
    ],
    "verbose": true
  }

When I run the coverage script I get this:

I don't use babel, and imports are done with import not require.
I'm on the latest versions of node.js, ava, nyc

[novemberborn]

I sometimes have trouble getting good reports out of nyc ava as well. Sometimes it helps to delete the coverage and .nyc_output directories. Maybe even node_modules/.cache.

I don't use babel, and imports are done with import not require.

So… you're using ESM with Node.js 13? There's a good chance that nyc cannot deal with that yet.

(I'm closing this issue for housekeeping purposes, but let's keep the conversation going.)

[ghost]

For some people nyc and esm works istanbuljs/nyc#905
I opened a ticket on nyc istanbuljs/nyc#1287 since it's more related to that than ava.
Thanks.

[DemianD]

Instead of using nyc, you can use https://github.com/bcoe/c8 which works with esm

npm install --save c8

"scripts": {
  "test": "ava",
  "coverage": "c8 --reporter=html --reporter=text ava"
}