Invalid file coverage object, missing keys

[davidlundmark]

Hi,

I'm trying to change test.provider from v8 to istanbul in my React project, for my vitests.

When using v8 everything works fine, the coverage report is created, but when changing it to istanbul it gives me an error when running my script, after the test has passed.

script: "test:coverage": "TEST=true vitest run --coverage"

vitest.config.ts

import react from "@vitejs/plugin-react";
import tsConfigPaths from "vite-tsconfig-paths";
import { ViteUserConfig, defineConfig } from "vitest/config";

export default defineConfig({
  plugins: [react(), tsConfigPaths()] as ViteUserConfig["plugins"],
  build: {
    sourcemap: "inline"
  },
  test: {
    environment: "jsdom",
    include: ["**/__tests__/isName.test.ts"],
    coverage: {
      provider: "istanbul",
      reporter: ["text"]
    }
  }
});

error:
Error: Invalid file coverage object, missing keys, found:/test/isName.ts
 ❯ assertValidObject ../../node_modules/@vitest/coverage-istanbul/node_modules/istanbul-lib-coverage/lib/file-coverage.js:38:15
 ❯ new FileCoverage ../../node_modules/@vitest/coverage-istanbul/node_modules/istanbul-lib-coverage/lib/file-coverage.js:214:9
 ❯ maybeConstruct ../../node_modules/@vitest/coverage-istanbul/node_modules/istanbul-lib-coverage/lib/coverage-map.js:15:12
 ❯ ../../node_modules/@vitest/coverage-istanbul/node_modules/istanbul-lib-coverage/lib/coverage-map.js:25:19
 ❯ loadMap ../../node_modules/@vitest/coverage-istanbul/node_modules/istanbul-lib-coverage/lib/coverage-map.js:24:28
 ❯ new CoverageMap ../../node_modules/@vitest/coverage-istanbul/node_modules/istanbul-lib-coverage/lib/coverage-map.js:42:25

I'm using "vitest": "3.0.5" and "@vitest/coverage-istanbul": "3.0.5", I have tried using 3.0.7 as well with the same issue.

Anyone that has any ideas what could be the issue?

[AriPerkkio]

Could you try setting up minimal example using https://vitest.new that runs into this issue?

The error is coming from https://github.com/istanbuljs/istanbuljs/blob/06eec782dc8a248f0516cdba06b280c410515890/packages/istanbul-lib-coverage/lib/file-coverage.js#L26-L43.

[davidlundmark]

Hi, I tried doing the same setup on vitest.new to be able to reproduce the issue, but I couldn't. So I figured out it's probably a fault on my end. What I did to get it fixed was that I had to re-generate a new worker script (mockServiceWorker.js), after that the reports was successfully created with istanbul as provider.

Thanks for the quick response, appreciated.