Add homekit_controller tests (#20457)

* Add a test for a homekit_controller switch

* Add a test for a homekit_controller lightbulb

* Add a test for homekit_controller thermostat

* Changes from review

* Patch utcnow to known time in HK tests

* Neater fixture use per review

tests/components/homekit_controller/test_switch.py

@@ -0,0 +1,49 @@
+"""Basic checks for HomeKitSwitch."""
+from tests.components.homekit_controller.common import (
+    setup_test_component)
+
+
+async def test_switch_change_outlet_state(hass, utcnow):
+    """Test that we can turn a HomeKit outlet on and off again."""
+    from homekit.model.services import OutletService
+
+    helper = await setup_test_component(hass, [OutletService()])
+
+    await hass.services.async_call('switch', 'turn_on', {
+        'entity_id': 'switch.testdevice',
+    }, blocking=True)
+    assert helper.characteristics[('outlet', 'on')].value == 1
+
+    await hass.services.async_call('switch', 'turn_off', {
+        'entity_id': 'switch.testdevice',
+    }, blocking=True)
+    assert helper.characteristics[('outlet', 'on')].value == 0
+
+
+async def test_switch_read_outlet_state(hass, utcnow):
+    """Test that we can read the state of a HomeKit outlet accessory."""
+    from homekit.model.services import OutletService
+
+    helper = await setup_test_component(hass, [OutletService()])
+
+    # Initial state is that the switch is off and the outlet isn't in use
+    switch_1 = await helper.poll_and_get_state()
+    assert switch_1.state == 'off'
+    assert switch_1.attributes['outlet_in_use'] is False
+
+    # Simulate that someone switched on the device in the real world not via HA
+    helper.characteristics[('outlet', 'on')].set_value(True)
+    switch_1 = await helper.poll_and_get_state()
+    assert switch_1.state == 'on'
+    assert switch_1.attributes['outlet_in_use'] is False
+
+    # Simulate that device switched off in the real world not via HA
+    helper.characteristics[('outlet', 'on')].set_value(False)
+    switch_1 = await helper.poll_and_get_state()
+    assert switch_1.state == 'off'
+
+    # Simulate that someone plugged something into the device
+    helper.characteristics[('outlet', 'outlet-in-use')].value = True
+    switch_1 = await helper.poll_and_get_state()
+    assert switch_1.state == 'off'
+    assert switch_1.attributes['outlet_in_use'] is True