Add support for pairing devices with hubs (#859)

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

tests/smart/modules/test_childsetup.py

@@ -0,0 +1,69 @@
+from __future__ import annotations
+
+import logging
+
+import pytest
+from pytest_mock import MockerFixture
+
+from kasa import Feature, Module, SmartDevice
+
+from ...device_fixtures import parametrize
+
+childsetup = parametrize(
+    "supports pairing", component_filter="child_quick_setup", protocol_filter={"SMART"}
+)
+
+
+@childsetup
+async def test_childsetup_features(dev: SmartDevice):
+    """Test the exposed features."""
+    cs = dev.modules.get(Module.ChildSetup)
+    assert cs
+
+    assert "pair" in cs._module_features
+    pair = cs._module_features["pair"]
+    assert pair.type == Feature.Type.Action
+
+
+@childsetup
+async def test_childsetup_pair(
+    dev: SmartDevice, mocker: MockerFixture, caplog: pytest.LogCaptureFixture
+):
+    """Test device pairing."""
+    caplog.set_level(logging.INFO)
+    mock_query_helper = mocker.spy(dev, "_query_helper")
+    mocker.patch("asyncio.sleep")
+
+    cs = dev.modules.get(Module.ChildSetup)
+    assert cs
+
+    await cs.pair()
+
+    mock_query_helper.assert_has_awaits(
+        [
+            mocker.call("begin_scanning_child_device", None),
+            mocker.call("get_support_child_device_category", None),
+            mocker.call("get_scan_child_device_list", params=mocker.ANY),
+            mocker.call("add_child_device_list", params=mocker.ANY),
+        ]
+    )
+    assert "Discovery done" in caplog.text
+
+
+@childsetup
+async def test_childsetup_unpair(
+    dev: SmartDevice, mocker: MockerFixture, caplog: pytest.LogCaptureFixture
+):
+    """Test unpair."""
+    mock_query_helper = mocker.spy(dev, "_query_helper")
+    DUMMY_ID = "dummy_id"
+
+    cs = dev.modules.get(Module.ChildSetup)
+    assert cs
+
+    await cs.unpair(DUMMY_ID)
+
+    mock_query_helper.assert_awaited_with(
+        "remove_child_device_list",
+        params={"child_device_list": [{"device_id": DUMMY_ID}]},
+    )