Remove confusing warning messages #1030 (#1032)

* Remove confusing warning messages #1030

* Fix test comments

slack_sdk/models/blocks/block_elements.py

@@ -149,10 +149,17 @@ def __init__(
         subtype: Optional[str] = None,
         **others: dict,
     ):
+        """An interactive block element.
+
+        We generally recommend using the concrete subclasses for better supports of available properties.
+        """
         if subtype:
             self._subtype_warning()
         super().__init__(type=type or subtype)
-        show_unknown_key_warning(self, others)
+
+        # Note that we don't intentionally have show_unknown_key_warning for the unknown key warnings here.
+        # It's fine to pass any kwargs to the held dict here although the class does not do any validation.
+        # show_unknown_key_warning(self, others)
 
         self.action_id = action_id
 
@@ -190,11 +197,17 @@ def __init__(
         confirm: Optional[Union[dict, ConfirmObject]] = None,
         **others: dict,
     ):
-        """InteractiveElement that is usable in input blocks"""
+        """InteractiveElement that is usable in input blocks
+
+        We generally recommend using the concrete subclasses for better supports of available properties.
+        """
         if subtype:
             self._subtype_warning()
         super().__init__(action_id=action_id, type=type or subtype)
-        show_unknown_key_warning(self, others)
+
+        # Note that we don't intentionally have show_unknown_key_warning for the unknown key warnings here.
+        # It's fine to pass any kwargs to the held dict here although the class does not do any validation.
+        # show_unknown_key_warning(self, others)
 
         self.placeholder = TextObject.parse(placeholder)
         self.confirm = ConfirmObject.parse(confirm)

tests/slack_sdk/models/test_elements.py

@@ -23,6 +23,8 @@
     ChannelSelectElement,
     ConfirmObject,
     Option,
+    InputInteractiveElement,
+    InteractiveElement,
 )
 from . import STRING_3001_CHARS, STRING_301_CHARS
 
@@ -32,6 +34,26 @@
 # -------------------------------------------------
 
 
+class InteractiveElementTests(unittest.TestCase):
+    def test_with_interactive_element(self):
+        input = {
+            "type": "plain_text_input",
+            "action_id": "plain_input",
+            "placeholder": {"type": "plain_text", "text": "Enter some plain text"},
+        }
+        # Any properties should not be lost
+        self.assertDictEqual(input, InteractiveElement(**input).to_dict())
+
+    def test_with_input_interactive_element(self):
+        input = {
+            "type": "plain_text_input",
+            "action_id": "plain_input",
+            "placeholder": {"type": "plain_text", "text": "Enter some plain text"},
+        }
+        # Any properties should not be lost
+        self.assertDictEqual(input, InputInteractiveElement(**input).to_dict())
+
+
 class InteractiveElementTests(unittest.TestCase):
     def test_action_id(self):
         with self.assertRaises(SlackObjectFormationError):