I can display datagrid content

tests/core/test_utils.py

@@ -1,6 +1,6 @@
 import pytest
 
-from myfasthtml.core.utils import flatten
+from myfasthtml.core.utils import flatten, make_html_id
 
 
 @pytest.mark.parametrize("input_args,expected,test_description", [
@@ -56,3 +56,11 @@ def test_i_can_flatten(input_args, expected, test_description):
   """Test that flatten correctly handles various nested structures and arguments."""
   result = flatten(*input_args)
   assert result == expected, f"Failed for test case: {test_description}"
+
+@pytest.mark.parametrize("string, expected", [
+    ("My Example String!", "My-Example-String_"),
+    ("123 Bad ID", "id_123-Bad-ID"),
+    (None, None)
+])
+def test_i_can_have_valid_html_id(string, expected):
+  assert make_html_id(string) == expected