CODEWITHSUNDEEP
reactjsnext.jscypresscode-coverageistanbul
dev_el
dev_el

Reputation: 2957

Nextjs Cypress Only found unit test code coverage

I am trying to add code coverage to cypress following this tutorial

I added @cypress/code-coverage and babel-plugin-istanbul to my package.json file below

{
  "name": "quiz",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "cypress": "cypress open"
  },
  "dependencies": {
    "next": "12.0.10",
    "react": "17.0.2",
    "react-dom": "17.0.2",
    "sass": "^1.49.7"
  },
  "devDependencies": {
    "@cypress/code-coverage": "^3.9.12",
    "@types/node": "17.0.15",
    "@types/react": "17.0.39",
    "babel-plugin-istanbul": "^6.1.1",
    "cypress": "^9.4.1",
    "eslint": "8.8.0",
    "eslint-config-next": "12.0.10",
    "typescript": "4.5.5"
  }
}

I configured my cypress/support/index.js

// Import commands.js using ES2015 syntax:
import './commands'

// Alternatively you can use CommonJS syntax:
// require('./commands')
import '@cypress/code-coverage/support'

I configured my cypress/plugins/index.js

/**
 * @type {Cypress.PluginConfig}
 */
// eslint-disable-next-line no-unused-vars
module.exports = (on, config) => {
  require('@cypress/code-coverage/task')(on, config)
  on('file:preprocessor', require('@cypress/code-coverage/use-babelrc'))
  return config
}

My .babelrc

{
  "presets": [
    "next/babel"
  ],
  "plugins": [
    "istanbul"
  ]
}

After I run my test I get the following message

Only found unit test code coverage. [@cypress/code-coverage]

enter image description here

After I run my quiz.spec.js test, I run

npx nyc report --reporter=text-summary

And get an empty coverage summary

enter image description here

What am I doing wrong?

My github

Upvotes: 2

Views: 1312

Answers (1)

Fody
Fody

Reputation: 32138

I think it was just a node_modules problem, as your repo worked after download and initialization. I think babel can fail silently if it's dependencies are out of order.

I removed package.lock (because I use yarn to manage things) and then yarn to init the dependecies.

Upvotes: 1

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