[jsinterp] Handle new YT players 113ca41c, c57c113c

* add NaN
* allow any white-space character for `after_op`
* align with yt-dlp f26af78a8ac11d9d617ed31ea5282cfaa5bcbcfa (charcodeAt and bitwise overflow)
* allow escaping in regex, fixing player c57c113c

1 files changed, 21 insertions, 0 deletions

diff --git a/test/test_jsinterp.py b/test/test_jsinterp.py
index fb4882d00..5121c8cf8 100644
--- a/test/test_jsinterp.py
+++ b/test/test_jsinterp.py
@@ -136,6 +136,11 @@ class TestJSInterpreter(unittest.TestCase):
 
     def test_builtins(self):
         jsi = JSInterpreter('''
+        function x() { return NaN }
+        ''')
+        self.assertTrue(math.isnan(jsi.call_function('x')))
+
+        jsi = JSInterpreter('''
         function x() { return new Date('Wednesday 31 December 1969 18:01:26 MDT') - 0; }
         ''')
         self.assertEqual(jsi.call_function('x'), 86000)
@@ -385,6 +390,22 @@ class TestJSInterpreter(unittest.TestCase):
         ''')
         self.assertEqual(jsi.call_function('x').flags & ~re.U, re.I)
 
+    def test_char_code_at(self):
+        jsi = JSInterpreter('function x(i){return "test".charCodeAt(i)}')
+        self.assertEqual(jsi.call_function('x', 0), 116)
+        self.assertEqual(jsi.call_function('x', 1), 101)
+        self.assertEqual(jsi.call_function('x', 2), 115)
+        self.assertEqual(jsi.call_function('x', 3), 116)
+        self.assertEqual(jsi.call_function('x', 4), None)
+        self.assertEqual(jsi.call_function('x', 'not_a_number'), 116)
+
+    def test_bitwise_operators_overflow(self):
+        jsi = JSInterpreter('function x(){return -524999584 << 5}')
+        self.assertEqual(jsi.call_function('x'), 379882496)
+
+        jsi = JSInterpreter('function x(){return 1236566549 << 5}')
+        self.assertEqual(jsi.call_function('x'), 915423904)
+
 
 if __name__ == '__main__':
     unittest.main()