Add support for pairing devices with hubs (#859)

Co-authored-by: Steven B. <51370195+sdb9696@users.noreply.github.com>

tests/smart/test_smartdevice.py

@@ -988,3 +988,24 @@ async def test_dynamic_devices(dev: Device, caplog: pytest.LogCaptureFixture):
         await dev.update()
 
     assert "Could not find child id for device" not in caplog.text
+
+
+@hubs_smart
+async def test_unpair(dev: SmartDevice, mocker: MockerFixture):
+    """Verify that unpair calls childsetup module."""
+    if not dev.children:
+        pytest.skip("device has no children")
+
+    child = dev.children[0]
+
+    assert child.parent is not None
+    assert Module.ChildSetup in dev.modules
+    cs = dev.modules[Module.ChildSetup]
+
+    unpair_call = mocker.spy(cs, "unpair")
+
+    unpair_feat = child.features.get("unpair")
+    assert unpair_feat
+    await unpair_feat.set_value(None)
+
+    unpair_call.assert_called_with(child.device_id)