Add double click module for smart buttons

tests/fakeprotocol_smart.py

@@ -167,6 +167,12 @@ class FakeSmartTransport(BaseTransport):
                 "setup_payload": "00:0000000-0000.00.000",
             },
         ),
+        "get_double_click_info": (
+            "double_click",
+            {
+                "enable": False,
+            },
+        ),
     }
 
     async def send(self, request: str):

tests/smart/modules/test_doubleclick.py

@@ -0,0 +1,43 @@
+"""Tests for smart double click module."""
+
+from __future__ import annotations
+
+from kasa import Device
+from kasa.smartcam.smartcammodule import SmartModule
+
+from ...device_fixtures import parametrize
+
+doubleclick = parametrize(
+    "has double click", component_filter="double_click", protocol_filter={"SMART.CHILD"}
+)
+
+
+@doubleclick
+async def test_doubleclick(dev: Device):
+    """Test device double click."""
+    doubleclick = dev.modules.get(SmartModule.SmartDoubleClick)
+    assert doubleclick
+
+    dc_feat = dev.features.get("double_click")
+    assert dc_feat
+
+    original_enabled = doubleclick.enabled
+
+    try:
+        await doubleclick.set_enabled(not original_enabled)
+        await dev.update()
+        assert doubleclick.enabled is not original_enabled
+        assert dc_feat.value is not original_enabled
+
+        await doubleclick.set_enabled(original_enabled)
+        await dev.update()
+        assert doubleclick.enabled is original_enabled
+        assert dc_feat.value is original_enabled
+
+        await dc_feat.set_value(not original_enabled)
+        await dev.update()
+        assert doubleclick.enabled is not original_enabled
+        assert dc_feat.value is not original_enabled
+
+    finally:
+        await doubleclick.set_enabled(original_enabled)