Updated README.md.

Added other TestableControls

tests/testclient/test_testable_textarea.py

@@ -0,0 +1,136 @@
+"""
+Comprehensive binding tests for all bindable FastHTML components.
+
+This test suite covers:
+- Input (text) - already tested
+- Checkbox - already tested
+- Textarea
+- Select (single)
+- Select (multiple)
+- Range (slider)
+- Radio buttons
+- Button
+- Input with Datalist (combobox)
+"""
+
+from dataclasses import dataclass
+
+from fasthtml.components import (
+  Label, Textarea
+)
+
+from myfasthtml.controls.helpers import mk
+from myfasthtml.core.bindings import Binding
+
+
+@dataclass
+class Data:
+  value: str = "hello world"
+
+
+@dataclass
+class NumericData:
+  value: int = 50
+
+
+@dataclass
+class BoolData:
+  value: bool = True
+
+
+@dataclass
+class ListData:
+  value: list = None
+  
+  def __post_init__(self):
+    if self.value is None:
+      self.value = []
+
+
+class TestBindingTextarea:
+  """Tests for binding Textarea components."""
+  
+  def test_i_can_bind_textarea(self, user, rt):
+    """
+    Textarea should bind bidirectionally with data.
+    Value changes should update the label.
+    """
+    
+    @rt("/")
+    def index():
+      data = Data("Initial text")
+      textarea_elt = Textarea(name="textarea_name")
+      label_elt = Label()
+      mk.manage_binding(textarea_elt, Binding(data))
+      mk.manage_binding(label_elt, Binding(data))
+      return textarea_elt, label_elt
+    
+    user.open("/")
+    user.should_see("Initial text")
+    
+    testable_textarea = user.find_element("textarea")
+    testable_textarea.send("New multiline\ntext content")
+    user.should_see("New multiline\ntext content")
+  
+  def test_i_can_bind_textarea_with_empty_initial_value(self, user, rt):
+    """
+    Textarea with empty initial value should update correctly.
+    """
+    
+    @rt("/")
+    def index():
+      data = Data("")
+      textarea_elt = Textarea(name="textarea_name")
+      label_elt = Label()
+      mk.manage_binding(textarea_elt, Binding(data))
+      mk.manage_binding(label_elt, Binding(data))
+      return textarea_elt, label_elt
+    
+    user.open("/")
+    user.should_see("")  # Empty initially
+    
+    testable_textarea = user.find_element("textarea")
+    testable_textarea.send("First content")
+    user.should_see("First content")
+  
+  def test_textarea_append_works_with_binding(self, user, rt):
+    """
+    Appending text to textarea should trigger binding update.
+    """
+    
+    @rt("/")
+    def index():
+      data = Data("Start")
+      textarea_elt = Textarea(name="textarea_name")
+      label_elt = Label()
+      mk.manage_binding(textarea_elt, Binding(data))
+      mk.manage_binding(label_elt, Binding(data))
+      return textarea_elt, label_elt
+    
+    user.open("/")
+    user.should_see("Start")
+    
+    testable_textarea = user.find_element("textarea")
+    testable_textarea.append(" + More")
+    user.should_see("Start + More")
+  
+  def test_textarea_clear_works_with_binding(self, user, rt):
+    """
+    Clearing textarea should update binding to empty string.
+    """
+    
+    @rt("/")
+    def index():
+      data = Data("Content to clear")
+      textarea_elt = Textarea(name="textarea_name")
+      label_elt = Label()
+      mk.manage_binding(textarea_elt, Binding(data))
+      mk.manage_binding(label_elt, Binding(data))
+      return textarea_elt, label_elt
+    
+    user.open("/")
+    user.should_see("Content to clear")
+    
+    testable_textarea = user.find_element("textarea")
+    testable_textarea.clear()
+    user.should_not_see("Content to clear")