ERR_UNSUPPORTED_ESM_URL_SCHEME error while running qunit test in cli (nodejs) mode

[abhinath84]

Tell us about your runtime:

• OS: Windows 10
• QUnit version: 2.17.2
• Which environment are you using? (e.g., browser, Node): Node v14.16.1
• How are you running QUnit? (e.g., QUnit CLI, Grunt, Karma, manually in browser): QUnit CLI

What are you trying to do?

Want to explore QUnit CLI and created a sample project to capture basic test cases.
To import module I used ES6 module import mechanism.
To support this, I modified package.json by adding "type": "module":

{
  "name": "es6-module",
  "version": "1.0.0",
  "description": "",
  "type": "module",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "qunit": "^2.17.2"
  }
}

In test.js file import a module which having all test cases:

import { testRun } from './test-cases.js';

testRun();

Here is the content of test-cases.js:

import { Math } from './math.js';

function testRun() {
  QUnit.module('setup', (hooks) => {
    
    hooks.before((assert) => {
      console.log(`Hook before`);
    });
    
    QUnit.module('add');
    QUnit.test('two numbers', assert => {
      assert.equal(Math.add(1, 2), 3);
    });

    QUnit.test('two negative numbers', assert => {
      assert.equal(Math.add(-11, -2), -13);
    });


    QUnit.module('sub');
    QUnit.test('two numbers', assert => {
      assert.equal(Math.sub(5, 1), 4);
    });
  });
}

export { testRun };

Here is the content of math.js:

const Math = {
  add: function(a, b) {
    hello();
    return a + b;
  },
  sub: function(a, b) {
    return a - b;
  }
};

export { Math };

I executed following command to run tests & it's gives 'ERR_UNSUPPORTED_ESM_URL_SCHEME error' as a result:
npx qunit ./test.js

What did you expect to happen?

I expected to execute all test cases & output the result.

What actually happened?

I'm getting following error message:

not ok 1 global failure
  ---
  message: |+
    Error: Failed to load file ./test.js
    Error: Only file and data URLs are supported by the default ESM loader. On Windows, absolute paths must be valid file:// URLs. Received protocol 'd:'
  severity: failed
  stack: |
    Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]: Only file and data URLs are supported by the default ESM loader. On Windows, absolute paths must be valid file:// URLs. Received protocol 'd:'
        at Loader.defaultResolve [as _resolve] (internal/modules/esm/resolve.js:782:11)
        at Loader.resolve (internal/modules/esm/loader.js:86:40)
        at Loader.getModuleJob (internal/modules/esm/loader.js:230:28)
        at Loader.import (internal/modules/esm/loader.js:165:28)
        at importModuleDynamically (internal/modules/cjs/loader.js:1006:27)
        at exports.importModuleDynamicallyCallback (internal/process/esm_loader.js:30:14)
        at run (D:\Pool\nodejs\es6-module issue\node_modules\qunit\src\cli\run.js:86:6)
        at Object.<anonymous> (D:\Pool\nodejs\es6-module issue\node_modules\qunit\bin\qunit.js:55:2)
        at Module._compile (internal/modules/cjs/loader.js:1063:30)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
  ...
Bail out! Error: Failed to load file ./test.js

Please help me to resolve the issue.
I need to import module in ES6 way and not in CommonJS way.

NOTE

If I modify line no: 87 in the file node_modules\qunit\src\cli\run.js with following code, problem is getting resolved:

if ( path.isAbsolute(filePath) ) {
  await import( pathToFileURL(filePath) );
} else {
  await import( filePath ); // eslint-disable-line node/no-unsupported-features/es-syntax
}

[Mugen87]

The three.js project migrated its unit tests to ES6 modules lately. They still work on macOS but fail with the above error message on Windows now. Tested with node.js > 16.

[Krinkle]

@Mugen87 Thanks, I'll get this fixed and released shortly.