no-vitest-coverage-all-false

Disallow test.coverage.all: false in shared Vitest config.

Rule catalog ID: R047

Targeted pattern scope

vitest.config.*
vitest.workspace.*
vite.config.* when Vitest coverage options are configured
test.coverage.all

What this rule reports

This rule reports explicit test.coverage.all: false assignments in supported config files.

Why this rule exists

Setting coverage.all to false can hide untested files from aggregate coverage expectations. For shared CI-facing config, this often weakens coverage signal unintentionally.

❌ Incorrect

import { defineConfig } from "vitest/config";

export default defineConfig({
    test: {
        coverage: {
            all: false,
        },
    },
});

✅ Correct

import { defineConfig } from "vitest/config";

export default defineConfig({
    test: {
        coverage: {
            all: true,
        },
    },
});

Behavior and migration notes

this rule checks static boolean assignments only
it targets committed config files, not arbitrary source modules

ESLint flat config example

import vite from "@typpi/eslint-plugin-vite";

export default [vite.configs.strict, vite.configs.vitest];

When not to use it

Disable this rule only if your project intentionally excludes non-imported files from coverage policy by design.

Package documentation

Vitest config reference

Targeted pattern scope​

What this rule reports​

Why this rule exists​

❌ Incorrect​

✅ Correct​

Behavior and migration notes​

ESLint flat config example​

When not to use it​

Package documentation​

Further reading​