I can bind radio

src/myfasthtml/test/testclient.py

@@ -300,7 +300,7 @@ class TestableElement:
           self.fields[name] = raw_value
         elif name not in self.fields:
           # If no radio is checked yet, don't set a default
-          pass
+          self.fields[name] = None
       
       elif input_type == 'number':
         # Number: int or float based on value
@@ -1104,6 +1104,9 @@ class TestableRadio(TestableControl):
         source: The source HTML or BeautifulSoup Tag.
     """
     super().__init__(client, source, "input")
+    nb_radio_buttons = len(self.element.find_all("input", type="radio"))
+    assert nb_radio_buttons > 0, "No radio buttons found."
+    assert nb_radio_buttons < 2, "Only one radio button per name is supported."
     self._radio_value = self.my_ft.attrs.get('value', '')
   
   @property
@@ -1573,6 +1576,9 @@ class MyTestClient:
         f"Found {len(remaining)} forms (with the specified fields). Expected exactly 1."
       )
   
+  def find_input(self, identifier: str) -> TestableInput:
+    pass
+  
   def get_content(self) -> str:
     """
     Get the raw HTML content of the last opened page.