Add switch support to the Flo integration (#38268)

* Add switch domain to Flo integration

* lint

* updates post rebase

* fix after rebase

* remove device state attrs

* oops

* stale name and docstring

tests/components/flo/test_switch.py

@@ -0,0 +1,31 @@
+"""Tests for the switch domain for Flo by Moen."""
+from homeassistant.components.flo.const import DOMAIN as FLO_DOMAIN
+from homeassistant.components.switch import DOMAIN
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, STATE_OFF, STATE_ON
+from homeassistant.setup import async_setup_component
+
+from .common import TEST_PASSWORD, TEST_USER_ID
+
+
+async def test_valve_switches(hass, config_entry, aioclient_mock_fixture):
+    """Test Flo by Moen valve switches."""
+    config_entry.add_to_hass(hass)
+    assert await async_setup_component(
+        hass, FLO_DOMAIN, {CONF_USERNAME: TEST_USER_ID, CONF_PASSWORD: TEST_PASSWORD}
+    )
+    await hass.async_block_till_done()
+
+    assert len(hass.data[FLO_DOMAIN]["devices"]) == 1
+
+    entity_id = "switch.shutoff_valve"
+    assert hass.states.get(entity_id).state == STATE_ON
+
+    await hass.services.async_call(
+        DOMAIN, "turn_off", {"entity_id": entity_id}, blocking=True
+    )
+    assert hass.states.get(entity_id).state == STATE_OFF
+
+    await hass.services.async_call(
+        DOMAIN, "turn_on", {"entity_id": entity_id}, blocking=True
+    )
+    assert hass.states.get(entity_id).state == STATE_ON