Cannot find coverage file .nyc_output/out.json in the automated build.

[Muthu2190]

I have followed this example for my project https://github.com/bahmutov/next-and-cypress-example and i can get the output in the .nyc_output folder while running in local env, but not in the automated build.

package.json:
"devDependencies": {
"cy-verify-downloads": "0.0.5",
"cypress": "8.6.0",
"cypress-file-upload": "^5.0.8",
"typescript": "^4.4.3",
"@cypress/browserify-preprocessor": "^3.0.1",
"@cypress/code-coverage": "^3.8.1",
"@istanbuljs/nyc-config-typescript": "^1.0.1",
"@testing-library/cypress": "^7.0.1",
"@types/testing-library__cypress": "^5.0.8",
"babel-plugin-istanbul": "^6.0.0",
"nyc": "^15.1.0"
},"nyc": {
"extends": "./.nycrc.json",
"report-dir": "cypress-coverage",
"reporter": [
"json",
"lcov"
]
}

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

.nycrc.json:
{
"extension": [".js", ".jsx", ".ts", ".tsx"],
"extends": "@istanbuljs/nyc-config-typescript",
"include": ["src/**/*"],
"all": true,
"sourceMap": true,
"instrument": true
}

cypress/support/index.js:
import '@cypress/code-coverage/support';

cypress/plugins/index.ts:

import browserify from '@cypress/browserify-preprocessor';

const pluginConfig: Cypress.PluginConfig = (on, config) => {
on('task', {
isFileExist
})
const options = browserify.defaultOptions;
options.browserifyOptions.transform[1][1].babelrc = true;
options.typescript = require.resolve('typescript');

require('@cypress/code-coverage/task')(on, config);
on('file:preprocessor', browserify(options));

return config;
};
module.exports = pluginConfig;

Error message from automated build:

Cannot find coverage file /tmp/build/515f5098/project_root_folder/.nyc_output/out.json
Skipping coverage report

[thednp]

Any update or information on this?

[shirleyzhoufc]

is there any update? I came across same issue

[arberosmani]

Same issue here. Locally it's working fine but on the gitlab-ci pipeline some tests are not passing:

...
    Test suite foo
      ✓ should ...
      ✓ should foo1
      ✓ should foo2
      ✓ should foo3
      1) "before each" hook for "should foo4"
Cannot find coverage file /appl/grp/gitlab-runner/builds/frhxYBZs/0/myapp/.nyc_output/out.json
Skipping coverage report
  10 passing (25s)
...

Any idea?

[thednp]

@arberosmani you can have a look at my repo relatively recent update. The github cli doesn't fail.

Note: the repo is typescript!

[wuwei3]

no update on this issue?

[Baluditor]

I'm facing the same issue, any update on this one please?

[MKhasib]

Hello @Baluditor @Muthu2190
I faced the issue with "vite-plugin-istanbul": "^5.0.0"
downgrading to "vite-plugin-istanbul": "^2.9.0" fixed it for me

You might have a different setup and need to see how code is instrumented using yoursetup

[Baluditor]

Hi @MKhasib, thank for the tip.
After a lot of trial and error I was able to come up with the following in my vite.config.ts:

import react from '@vitejs/plugin-react';
import { defineConfig, loadEnv } from 'vite';
import istanbul from 'vite-plugin-istanbul';
import svgr from 'vite-plugin-svgr';

export default ({ mode }) => {
  process.env = { ...process.env, ...loadEnv(mode, process.cwd()) };
  const shouldInstrument =
    process.env.VITE_APP_ENV === 'local' ||
    process.env.VITE_APP_ENV === 'testing' ||
    process.env.VITE_APP_ENV === 'qa';

  return defineConfig({
    base: '/',
    build: {
      sourcemap: true,
      rollupOptions: {
        // Silence warnings https://github.com/vitejs/vite/issues/15012
        onLog(level, log, handler) {
          if (
            log.cause &&
            log.cause['message'] === `Can't resolve original location of error.`
          ) {
            return;
          }
          handler(level, log);
        },
        output: {
          // Disable source maps for dependencies
          sourcemap: false,
        },
      },
    },
    plugins: [
      react(),
      svgr(),
      istanbul({
        extension: ['.js', '.jsx', '.ts', '.tsx'],
        exclude: ['node_modules', 'cypress', '**/*.cy.ts', '**/*.cy.tsx'],
        cypress: true,
        // By default it will always instrument the code.
        // We only want to instrument the code when we are running it locally or in the testing or QA environment.
        requireEnv: !shouldInstrument,
        forceBuildInstrument: shouldInstrument,
      }),
    ],
    server: {
      open: true,
      port: 3000,
    },
  });
};

It's not the pretties solution but it gets the job done. Will try to downgrade the package as well to see if it solves it, will report back (but it might take a while).