add unit test to check if too long in the extract method as well

Author: mkhazin-r7

tests/test_pydomainextractor.py

@@ -301,6 +301,14 @@ def test_syntactic_invalid_domains(
         ):
             self.domain_extractor.extract('com.')
 
+    def test_domain_too_long(
+        self,
+    ):
+        with self.assertRaises(
+            expected_exception=ValueError,
+        ):
+            self.domain_extractor.extract(f'{"very-long" * 255}.com')
+
     def test_extract_from_url(
         self,
     ):