fix(auto-thumbnail): [PKG-AUTO-THUMB-09] restore historical default calls

test/auto-thumbnail-exports.test.js

@@ -0,0 +1,35 @@
+import assert from 'node:assert/strict'
+// eslint-disable-next-line test/no-import-node-test -- Native export compatibility regression runner.
+import test from 'node:test'
+import { autoThumbnailCandidate, autoThumbnailEnvironment } from './helpers/auto-thumbnail.js'
+
+const implementation = await autoThumbnailCandidate()
+
+for (const script of [false, true]) {
+  test(`Auto-thumbnail ${script ? 'script global' : 'CommonJS'} keeps direct and historical default calls on one factory`, async () => {
+    const env = autoThumbnailEnvironment(implementation, { script })
+    const factory = env.factory
+    assert.equal(typeof factory, 'function')
+    assert.equal(factory.default, factory)
+    assert.equal(factory.default.default, factory)
+    assert.equal(env.videos.length, 0)
+    const original = Object.getOwnPropertyDescriptor(factory, 'default')
+    assert.deepEqual(original, { value: factory, writable: true, enumerable: true, configurable: true })
+    const registrar = factory.default({ width: 80, number: 2 })
+    const pending = registrar(env.art)
+    assert.equal(pending.name, undefined)
+    assert.equal(typeof pending.then, 'function')
+    assert.deepEqual({ ...await pending }, { name: 'artplayerPluginAutoThumbnail' })
+    assert.equal(env.videos.length, 0, 'Alias registration must not start extraction')
+    env.art.emit('video:loadedmetadata')
+    env.metadata()
+    env.seeked()
+    env.finish()
+    assert.equal(env.updates.length, 1)
+    assert.equal(env.updates[0].width, 80)
+    env.art.emit('destroy')
+    assert.equal(env.attached.size, 0)
+    assert.equal(env.urls.size, 0)
+    assert([...env.listeners.values()].every(callbacks => callbacks.size === 0))
+  })
+}