Change device entry type to an StrEnum (#59940)

Co-authored-by: Ville Skyttä <ville.skytta@iki.fi>
Co-authored-by: Franck Nijhof <git@frenck.dev>

tests/util/test_enum.py

@@ -0,0 +1,35 @@
+"""Test Home Assistant enum utils."""
+
+from enum import auto
+
+import pytest
+
+from homeassistant.util.enum import StrEnum
+
+
+def test_strenum():
+    """Test StrEnum."""
+
+    class TestEnum(StrEnum):
+        Test = "test"
+
+    assert str(TestEnum.Test) == "test"
+    assert TestEnum.Test == "test"
+    assert TestEnum("test") is TestEnum.Test
+    assert TestEnum(TestEnum.Test) is TestEnum.Test
+
+    with pytest.raises(ValueError):
+        TestEnum(42)
+
+    with pytest.raises(ValueError):
+        TestEnum("str but unknown")
+
+    with pytest.raises(TypeError):
+
+        class FailEnum(StrEnum):
+            Test = 42
+
+    with pytest.raises(TypeError):
+
+        class FailEnum2(StrEnum):
+            Test = auto()