sveltejs · Rich-Harris · Aug 11, 2025 · Aug 11, 2025 · Aug 11, 2025
diff --git a/playgrounds/sandbox/package.json b/playgrounds/sandbox/package.json
@@ -11,7 +11,8 @@
     "prod": "npm run build && node dist/server/ssr-prod",
     "preview": "vite preview",
     "download": "node scripts/download.js",
-    "hash": "node scripts/hash.js"
+    "hash": "node scripts/hash.js",
+    "create-test": "node scripts/create-test.js"
   },
   "devDependencies": {
     "@sveltejs/vite-plugin-svelte": "^4.0.0-next.6",

diff --git a/playgrounds/sandbox/scripts/create-test.js b/playgrounds/sandbox/scripts/create-test.js
@@ -0,0 +1,155 @@
+// Creates a test from the existing playground. cwd needs to be playground/sandbox
+import fs from 'fs';
+import path from 'path';
+
+// Get target folder from command line arguments
+let target_folder = process.argv[2];
+if (!target_folder) {
+	console.error(
+		'Please provide a target folder as an argument. Example: node create-test.js runtime-runes/my-test'
+	);
+	process.exit(1);
+}
+if (!target_folder.includes('/')) {
+	target_folder = 'runtime-runes/' + target_folder;
+}
+if (!target_folder.startsWith('runtime-')) {
+	console.error(
+		'Target folder must start with "runtime-" (can only convert to these kinds of tests)'
+	);
+	process.exit(1);
+}
+target_folder = path.join(
+	path.resolve('../../packages/svelte/tests', target_folder.split('/')[0]),
+	'samples',
+	target_folder.split('/')[1]
+);
+
+const exists = fs.existsSync(target_folder);
+
+// Check if target folder already exists and ask for confirmation
+if (exists) {
+	console.log(`Target folder "${target_folder}" already exists.`);
+	process.stdout.write('Do you want to override the existing test? (Y/n): ');
+
+	// Read user input synchronously
+	const stdin = process.stdin;
+	stdin.setRawMode(true);
+	stdin.resume();
+	stdin.setEncoding('utf8');
+
+	const response = await new Promise((resolve) => {
+		stdin.on('data', (key) => {
+			stdin.setRawMode(false);
+			stdin.pause();
+			process.stdout.write('\n');
+			resolve(key);
+		});
+	});
+
+	if (response.toLowerCase() === 'n') {
+		console.log('Operation cancelled.');
+		process.exit(0);
+	}
+
+	// Clear the existing target folder except for _config.js
+	const files = fs.readdirSync(target_folder);
+	for (const file of files) {
+		if (file !== '_config.js') {
+			const filePath = path.join(target_folder, file);
+			fs.rmSync(filePath, { recursive: true, force: true });
+		}
+	}
+} else {
+	fs.mkdirSync(target_folder, { recursive: true });
+}
+
+// Starting file
+const app_svelte_path = path.resolve('./src/App.svelte');
+const collected_files = new Set();
+const processed_files = new Set();
+
+function collect_imports(file_path) {
+	if (processed_files.has(file_path) || !fs.existsSync(file_path)) {
+		return;
+	}
+
+	processed_files.add(file_path);
+	collected_files.add(file_path);
+
+	const content = fs.readFileSync(file_path, 'utf8');
+
+	// Regex to match import statements
+	const import_regex = /import\s+(?:[^'"]*\s+from\s+)?['"]([^'"]+)['"]/g;
+	let match;
+
+	while ((match = import_regex.exec(content)) !== null) {
+		const import_path = match[1];
+
+		// Skip node_modules imports
+		if (!import_path.startsWith('.')) {
+			continue;
+		}
+
+		// Resolve relative import path
+		const resolved_path = path.resolve(path.dirname(file_path), import_path);
+
+		// Try different extensions if file doesn't exist
+		const extensions = ['', '.svelte', '.js', '.ts'];
+		let actual_path = null;
+
+		for (const ext of extensions) {
+			const test_path = resolved_path + ext;
+			if (fs.existsSync(test_path)) {
+				actual_path = test_path;
+				break;
+			}
+		}
+
+		if (actual_path) {
+			collect_imports(actual_path);
+		}
+	}
+}
+
+// Start collecting from App.svelte
+collect_imports(app_svelte_path);
+
+// Copy collected files to target folder
+for (const file_path of collected_files) {
+	const relative_path = path.relative(path.resolve('./src'), file_path);
+	let target_path = path.join(target_folder, relative_path);
+
+	// Rename App.svelte to main.svelte
+	if (path.basename(file_path) === 'App.svelte') {
+		target_path = path.join(target_folder, path.dirname(relative_path), 'main.svelte');
+	}
+
+	// Ensure target directory exists
+	const target_dir = path.dirname(target_path);
+	if (!fs.existsSync(target_dir)) {
+		fs.mkdirSync(target_dir, { recursive: true });
+	}
+
+	// Copy file
+	fs.copyFileSync(file_path, target_path);
+	console.log(`Copied: ${file_path} -> ${target_path}`);
+}
+
+// Create empty _config.js
+if (!exists) {
+	const config_path = path.join(target_folder, '_config.js');
+	fs.writeFileSync(
+		config_path,
+		`import { test } from '../../test';
+
+export default test({
+	async test({ assert, target }) {
+	}
+});
+`
+	);
+	console.log(`Created: ${config_path}`);
+}
+
+console.log(`\nTest files created in: ${target_folder}`);