Error: EISDIR: illegal operation on a directory, read (npm test)

[aelbore]

Please provide the environment you discovered this bug in.

stackblitz
https://stackblitz.com/edit/stackblitz-starters-yjhfgh

Just download and run it locally

Which area/package is the issue in?

vite-plugin-angular

Description

when running the test it has "Error: EISDIR: illegal operation on a directory" error.
when using "happy-dom" and "jsdom" with "rxjs@6.6.7"

it works fine if

• when it using playwright it works fine with
• using "happy-dom" and "jsdom" with "rxjs@7.x"

Note: not too sure if this is analogjs issue or with vite/vitest

Please provide the exception or error you saw

"Error: EISDIR: illegal operation on a directory"

Other information

No response

I would be willing to submit a PR to fix this issue

• Yes
• No

[brandonroberts]

I've run into a similar issue also in another repo. Did some digging here and it has something to do with the bundling of rxjs. If you disable the angular plugin, you get.

 FAIL  src/app.component.spec.ts [ src/app.component.spec.ts ]
Error: Directory import '/Users/dev/projects/stackblitz-starters-yjhfgh/node_modules/rxjs/operators' is not supported resolving ES modules imported from /Users/dev/projects/stackblitz-starters-yjhfgh/node_modules/@angular/core/fesm2022/testing.mjs
Did you mean to import rxjs/operators/index.js?
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
Serialized Error: { url: 'file:///Users/dev/projects/stackblitz-starters-yjhfgh/node_modules/rxjs/operators', code: 'ERR_UNSUPPORTED_DIR_IMPORT' }

If you go into the .mjs files and replace rxjs/operators with rxjs/operators/index.js, it works fine.

[aelbore]

@brandonroberts thanks will try this, by the way thanks for the plugin great job ^_^

[brandonroberts]

Found a workaround.

/// <reference types="vitest" />
import { defineConfig } from 'vite';

import angular from '@analogjs/vite-plugin-angular';

export default defineConfig(({ mode }) => ({
  plugins: [angular()],
  test: {
    globals: true,
    setupFiles: ['src/test-setup.ts'],
    environment: 'happy-dom',
    include: ['src/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
    reporters: ['default'],
    server: {
      deps: {
        inline: [/fesm2022/]
      }
    }
  },
  define: {
    'import.meta.vitest': mode !== 'production',
  },
}));

We're already doing this internally but only for cdk/fesm libraries because it slows down running the tests.

[aelbore]

Found a workaround.

/// <reference types="vitest" />
import { defineConfig } from 'vite';

import angular from '@analogjs/vite-plugin-angular';

export default defineConfig(({ mode }) => ({
  plugins: [angular()],
  test: {
    globals: true,
    setupFiles: ['src/test-setup.ts'],
    environment: 'happy-dom',
    include: ['src/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
    reporters: ['default'],
    server: {
      deps: {
        inline: [/fesm2022/]
      }
    }
  },
  define: {
    'import.meta.vitest': mode !== 'production',
  },
}));

We're already doing this internally but only for cdk/fesm libraries because it slows down running the tests.

@brandonroberts wow this works for me, is this just a work around if using rxjs@6.x?
thank you so much on this, i didnt know theres server options in test

[brandonroberts]

@aelbore not sure if its only needed for rxjs 6.x because our tests are running fine without it on RxJS 7.x. Maybe it surfaced as a result of switching to ESM.

I may add it as a config option because of the performance cost, but I'd prefer to not include it by default.

[ahnpnl]

I ran into this error as well with RxJs 7.x. The workaround works for me.

[brandonroberts]

I ran into this error as well with RxJs 7.x. The workaround works for me.

What version of RxJS was it?

[ahnpnl]

It is 7.8.1, this is the repo https://github.com/ahnpnl/monorepo-multi-apps

To reproduce:

• uncomment the workaround in https://github.com/ahnpnl/monorepo-multi-apps/blob/main/apps/ng-app/vitest.config.mts
• At root of the project, run pnpm run test

[brandonroberts]

It is 7.8.1, this is the repo https://github.com/ahnpnl/monorepo-multi-apps

To reproduce:

• uncomment the workaround in https://github.com/ahnpnl/monorepo-multi-apps/blob/main/apps/ng-app/vitest.config.mts
• At root of the project, run pnpm run test

Thanks. If you downlevel the target in the tsconfig, the workaround isn't needed.

// apps/ng-app/tsconfig.spec.json

/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/spec",
    "target": "es2016",
    "types": ["node", "vitest/globals"]
  },
  "files": ["test/Framework/testSetup.ts"],
  "include": ["src/**/*.spec.ts", "src/**/*.d.ts"]
}

// apps/ng-app/vitest.config.mts
import angular from '@analogjs/vite-plugin-angular';
import { defineConfig } from 'vite';

export default defineConfig(() => ({
    plugins: [
        angular(),
    ],
    test: {
        globals: true,
        environment: 'jsdom',
        setupFiles: ['test/Framework/testSetup.ts'],
        include: ['test/**/*.spec.ts'],
        passWithNoTests: true,
    },
}));

[brandonroberts]

It also works by just adding "files": ["test/Framework/testSetup.ts"], to the apps/ng-app/tsconfig.json

[ahnpnl]

Among these workarounds, do they have the same root cause about switching to ESM like being mentioned above?

[brandonroberts]

Among these workarounds, do they have the same root cause about switching to ESM like being mentioned above?

Yes, using ESM requires the file extensions and unless the angular libraries are transformed/inlined, it won't convert the import paths to include the extension.

[ahnpnl]

Reading about downside of specifying inline dep above impacts the performance, we have 2 other workarounds: downleveling target vs including setup file in tsconfig, which one would be easier to understand for devs in your opinion?

For me:

• Downleveling target reminds me of this issue bug(HarnessLoader): Unit tests fail when the harness loader is created in beforeEach angular/components#21632 (comment), possibly it has been resolved. This one is actually not too obvious to devs about what’s going on.

• Including setup files in tsconfig seems to be more obvious, though I’m not sure how to explain about this workaround, not really obvious about being related to ESM.

Is there something analogjs can do to warn users about this?

[brandonroberts]

I think including the setup file in the tsconfig is the most straightforward path. We include a downleveled tsconfig with the application templates by default.

Past that, I think the performance hit should be an opt-in that could be a flag or explained in the docs.