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builder / lib /vfs /__tests__ /export-import.test.ts

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	import { describe, it, expect, beforeAll } from 'vitest';
	import 'fake-indexeddb/auto';
	import { vfs } from '../index';

	// Exercises the real VFS export → JSON round-trip → import path to guard
	// against binary assets and project settings being lost (issue #11).

	describe('project export/import round-trip', () => {
	beforeAll(async () => {
	await vfs.init();
	});

	it('preserves binary files and project settings through JSON', async () => {
	const project = await vfs.createProject('Round Trip', 'test');
	project.settings = { ...project.settings, runtime: 'static' };
	await vfs.updateProject(project);

	await vfs.createFile(project.id, '/index.html', '<html><body>hi</body></html>');

	const pngBytes = new Uint8Array([137, 80, 78, 71, 13, 10, 26, 10, 1, 2, 3, 250]);
	await vfs.createFile(project.id, '/myimage.png', pngBytes.buffer);

	// Serialize exactly as the export UI does, then parse back.
	const exported = await vfs.exportProject(project.id);
	const roundTripped = JSON.parse(JSON.stringify(exported));

	const imported = await vfs.importProject(roundTripped);

	// Settings (runtime) survives instead of resetting to the legacy default.
	expect(imported.settings.runtime).toBe('static');

	// Text file content is intact.
	const html = await vfs.readFile(imported.id, '/index.html');
	expect(html.content).toBe('<html><body>hi</body></html>');

	// Binary file is restored to an ArrayBuffer with identical bytes.
	const img = await vfs.readFile(imported.id, '/myimage.png');
	expect(img.content).toBeInstanceOf(ArrayBuffer);
	expect(Array.from(new Uint8Array(img.content as ArrayBuffer))).toEqual(
	Array.from(pngBytes)
	);
	});

	it('duplicateProject carries over project settings', async () => {
	const project = await vfs.createProject('Dup Settings', 'test');
	project.settings = { ...project.settings, runtime: 'static' };
	await vfs.updateProject(project);

	const copy = await vfs.duplicateProject(project.id);
	expect(copy.settings.runtime).toBe('static');
	});
	});