test: introduce test-vitest-setup

[AndriiSiuta]

Closes #1065

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commit: 3551706

[BioPhoton]

Thx for starting this refactor! Looking forward to a clean test config setup.

Some remarks, If you open a PR and request a review please do a self review.

Check if:

• all changes are applied in a consistent way. Not different versions for the same change. E.g. you extend the global configuration in different ways.
• do not add code changes out of scope. If they are necessary mention them in a comment
• potentially add information on the state of the PR e.g. DO NOT REFIEW and additional comments about unfinished parts.
• If you use AI do an extra detailed review!

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View your CI Pipeline Execution ↗ for commit 3551706

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---

☁️ Nx Cloud last updated this comment at 2025-08-22 10:25:48 UTC

[BioPhoton]

You could use the types from vite/vitest directly:

// from vite
import type { UserConfig } from 'vite';
type TestCoverage = Exclude<UserConfig['test'], undefined>;
// from vitest
import type { UserConfig } from 'vitest';
type TestCoverage = UserConfig;

// for both
const testConfig: TestCoverage = {
    coverage: {
      reporter: ['text', 'lcov'],
      reportsDirectory: '../../coverage/plugin-eslint/int-tests',
      exclude: ['mocks/**', '**/types.ts'],
    },
};

I suggest go with types from vitest and remove the types in this file.

[BioPhoton]

Why is this change needed? I think we can revert it. Was there a problem?

[BioPhoton]

Could this be the same as in test-setup?

import tseslint from 'typescript-eslint';
import baseConfig from '../../eslint.config.js';

export default tseslint.config(...baseConfig, {
  files: ['**/*.ts'],
  languageOptions: {
    parserOptions: {
      projectService: true,
      tsconfigRootDir: import.meta.dirname,
    },
  },
});