add some tests

Author: zloirock

tests/tests/es.regexp.constructor.js

@@ -69,6 +69,9 @@ if (DESCRIPTORS) {
     assert.same(RegExp('(?<a>b)').exec('b').groups?.a, 'b', 'NCG #1');
     // eslint-disable-next-line regexp/no-unused-capturing-group -- required for testing
     assert.same(RegExp('(b)').exec('b').groups, undefined, 'NCG #2');
+    const { groups } = RegExp('foo:(?<foo>\\w+),bar:(?<bar>\\w+)').exec('foo:abc,bar:def');
+    assert.deepEqual(groups, { foo: 'abc', bar: 'def' }, 'NCG #3');
+    assert.same(Object.getPrototypeOf(groups), null, 'NCG #4');
     assert.same('foo:abc,bar:def'.replace(RegExp('foo:(?<foo>\\w+),bar:(?<bar>\\w+)'), '$<bar>,$<foo>'), 'def,abc', 'replace #1');
     assert.same('foo:abc,bar:def'.replace(RegExp('foo:(?<foo>\\w+),bar:(?<bar>\\w+)'), (...args) => {
       const { foo, bar } = args.pop();