Fixed unit tests

src/core/fasthtml_helper.py

@@ -7,10 +7,13 @@ attr_map = {
     "_id": "id",
 }
 
+
 def safe_attr(attr_name):
   attr_name = attr_name.replace("hx_", "hx-")
+  attr_name = attr_name.replace("data_", "data-")
   return attr_map.get(attr_name, attr_name)
 
+
 def to_html(item):
   if item is None:
     return ""
@@ -27,14 +30,14 @@ def to_html(item):
 
 
 class MyFt:
-  def __init__(self, name, *args, **kwargs):
-    self.name = name
+  def __init__(self, tag, *args, **kwargs):
+    self.tag = tag
     self.children = args
-    self.attrs = kwargs
+    self.attrs = {safe_attr(k): v for k, v in kwargs.items()}
   
   def to_html(self):
     body_items = [to_html(item) for item in self.children]
-    return f"<{self.name} {' '.join(f'{safe_attr(k)}="{v}"' for k, v in self.attrs.items())}>{' '.join(body_items)}</div>"
+    return f"<{self.tag} {' '.join(f'{k}="{v}"' for k, v in self.attrs.items())}>{' '.join(body_items)}</div>"
   
   def __ft__(self):
     return NotStr(self.to_html())