Update Hue data fetching (#31338)

* Refactor Hue Lights to use DataCoordinator

* Redo how Hue updates data

* Address comments

* Inherit from Entity and remove pylint disable

* Add tests for debounce

tests/helpers/test_debounce.py

@@ -0,0 +1,62 @@
+"""Tests for debounce."""
+from asynctest import CoroutineMock
+
+from homeassistant.helpers import debounce
+
+
+async def test_immediate_works(hass):
+    """Test immediate works."""
+    calls = []
+    debouncer = debounce.Debouncer(
+        hass, None, 0.01, True, CoroutineMock(side_effect=lambda: calls.append(None))
+    )
+
+    await debouncer.async_call()
+    assert len(calls) == 1
+    assert debouncer._timer_task is not None
+    assert debouncer._execute_at_end_of_timer is False
+
+    await debouncer.async_call()
+    assert len(calls) == 1
+    assert debouncer._timer_task is not None
+    assert debouncer._execute_at_end_of_timer is True
+
+    debouncer.async_cancel()
+    assert debouncer._timer_task is None
+    assert debouncer._execute_at_end_of_timer is False
+
+    await debouncer.async_call()
+    assert len(calls) == 2
+    await debouncer._handle_timer_finish()
+    assert len(calls) == 2
+    assert debouncer._timer_task is None
+    assert debouncer._execute_at_end_of_timer is False
+
+
+async def test_not_immediate_works(hass):
+    """Test immediate works."""
+    calls = []
+    debouncer = debounce.Debouncer(
+        hass, None, 0.01, False, CoroutineMock(side_effect=lambda: calls.append(None))
+    )
+
+    await debouncer.async_call()
+    assert len(calls) == 0
+    assert debouncer._timer_task is not None
+    assert debouncer._execute_at_end_of_timer is True
+
+    await debouncer.async_call()
+    assert len(calls) == 0
+    assert debouncer._timer_task is not None
+    assert debouncer._execute_at_end_of_timer is True
+
+    debouncer.async_cancel()
+    assert debouncer._timer_task is None
+    assert debouncer._execute_at_end_of_timer is False
+
+    await debouncer.async_call()
+    assert len(calls) == 0
+    await debouncer._handle_timer_finish()
+    assert len(calls) == 1
+    assert debouncer._timer_task is None
+    assert debouncer._execute_at_end_of_timer is False