1import { spawnPromisified } from '../common/index.mjs';
2import * as fixtures from '../common/fixtures.mjs';
3import assert from 'node:assert';
4import { execPath } from 'node:process';
5import { describe, it } from 'node:test';
6
7
8describe('ESM: ensure initialization happens only once', { concurrency: true }, () => {
9  it(async () => {
10    const { code, stderr, stdout } = await spawnPromisified(execPath, [
11      '--experimental-import-meta-resolve',
12      '--loader',
13      fixtures.fileURL('es-module-loaders', 'loader-resolve-passthru.mjs'),
14      '--no-warnings',
15      fixtures.path('es-modules', 'runmain.mjs'),
16    ]);
17
18    assert.strictEqual(stderr, '');
19    /**
20     * resolveHookRunCount = 2:
21     * 1. fixtures/…/runmain.mjs
22     * 2. node:module (imported by fixtures/…/runmain.mjs)
23     * 3. doesnt-matter.mjs (first import.meta.resolve call)
24     * 4. fixtures/…/runmain.mjs (entry point)
25     * 5. doesnt-matter.mjs (second import.meta.resolve call)
26     */
27    assert.strictEqual(stdout.match(/resolve passthru/g)?.length, 5);
28    assert.strictEqual(code, 0);
29  });
30});
31