chore: add way to update snapshots

Author: dummdidumm

package.json

@@ -14,6 +14,7 @@
 		"check": "tsc --noEmit",
 		"lint": "prettier --check .",
 		"test": "vitest run",
+		"test:update": "cross-env UPDATE_SNAPSHOT=true vitest run",
 		"test:test262": "npm run build && node ./__test__/run_test262.js",
 		"changeset:version": "changeset version && git add --all",
 		"changeset:release": "changeset publish"
@@ -39,6 +40,7 @@
 		"@svitejs/changesets-changelog-github-compact": "^1.1.0",
 		"acorn": "^8.14.0",
 		"acorn-jsx": "~5.3.2",
+		"cross-env": "^7.0.3",
 		"esbuild": "^0.25.0",
 		"prettier": "~3.5.2",
 		"test262": "git+https://github.com/tc39/test262.git#88ebb1e3755198cd08757bca1698effbbf360345",

pnpm-lock.yaml

@@ -30,7 +30,15 @@ describe('tests', () => {
 							? parseDtsSource(input_code)
 							: parseSource(input_code);
 
-					equalNode(parsed_result, expected_result);
+					try {
+						equalNode(parsed_result, expected_result);
+					} catch (e) {
+						if (process.env.UPDATE_SNAPSHOT) {
+							fs.writeFileSync(expected_path, JSON.stringify(parsed_result, null, 2));
+						} else {
+							throw e;
+						}
+					}
 				});
 			} else if (fs.existsSync(error_path)) {
 				it(dirent.name, () => {