add some tests

package.json

@@ -137,14 +137,15 @@
     "test-entries-basic": "zx tests/commonjs.mjs",
     "test-entries-content": "zx tests/commonjs-entries-content.mjs",
     "test-entries-standalone": "run-s init test-entries",
+    "test-builder": "zx tests/builder/builder.mjs",
     "test-compat-tools": "run-p test-compat-tool test-compat-targets-parser test-compat-get-modules-list-for-target-version",
     "test-compat-tool": "zx tests/compat-tools/compat.mjs",
     "test-compat-targets-parser": "zx tests/compat-tools/targets-parser.mjs",
     "test-compat-get-modules-list-for-target-version": "zx tests/compat-tools/get-modules-list-for-target-version.mjs",
     "test262": "test262-harness -t \"$(node -pe 'os.cpus().length')\" --host-args='--unhandled-rejections=none' --preprocessor=./tests/test262.js --prelude=./packages/core-js-bundle/index.js --test262-dir=node_modules/test262 'node_modules/test262/test/built-ins/**/*.js'",
-    "test": "run-s init test-lint bundle test-unit test-promises test-observables test-entries test-compat-tools check",
+    "test": "run-s init test-lint bundle test-unit test-promises test-observables test-entries test-compat-tools test-builder check",
     "ci-karma": "run-s init bundle test-unit-karma",
-    "ci-tests": "run-s init bundle test-unit-node test-promises test-observables test-entries test-compat-tools",
+    "ci-tests": "run-s init bundle test-unit-node test-promises test-observables test-entries test-compat-tools test-builder",
     "clean-dependencies": "node scripts/clean-dependencies.mjs",
     "refresh": "npm run clean-dependencies && npm it",
     "downloads": "zx scripts/downloads-by-versions.mjs",

tests/builder/builder.mjs

@@ -0,0 +1,19 @@
+import { ok } from 'assert/strict';
+import builder from 'core-js-builder';
+
+const polyfills = await builder({
+  modules: 'core-js/actual',
+  exclude: [/group-by/, 'esnext.typed-array.to-spliced'],
+  targets: { node: 16 },
+  format: 'esm',
+});
+
+ok(polyfills.includes("import 'core-js/modules/es.error.cause.js';"), 'actual node 16 #1');
+ok(polyfills.includes("import 'core-js/modules/es.array.push.js';"), 'actual node 16 #2');
+ok(polyfills.includes("import 'core-js/modules/esnext.array.group.js';"), 'actual node 16 #3');
+ok(polyfills.includes("import 'core-js/modules/web.structured-clone.js';"), 'actual node 16 #4');
+ok(!polyfills.includes("import 'core-js/modules/es.weak-set.js';"), 'actual node 16 #5');
+ok(!polyfills.includes("import 'core-js/modules/esnext.weak-set.from.js';"), 'actual node 16 #6');
+ok(!polyfills.includes("import 'core-js/modules/esnext.array.group-by.js';"), 'actual node 16 #7');
+
+echo(chalk.green('builder tested'));