Rename BinarySensorDevice to BinarySensorEntity (#34462)

* Rename BinarySensorDevice to BinarySensorEntity

* Tweak

* Move deprecation warning to __new__, add test

* Move deprecation warning back to __init__

* Move deprecation warning to __init_subclass

tests/components/binary_sensor/test_init.py

@@ -1,24 +1,29 @@
 """The tests for the Binary sensor component."""
-import unittest
 from unittest import mock
 
 from homeassistant.components import binary_sensor
 from homeassistant.const import STATE_OFF, STATE_ON
 
 
-class TestBinarySensor(unittest.TestCase):
-    """Test the binary_sensor base class."""
+def test_state():
+    """Test binary sensor state."""
+    sensor = binary_sensor.BinarySensorEntity()
+    assert STATE_OFF == sensor.state
+    with mock.patch(
+        "homeassistant.components.binary_sensor.BinarySensorEntity.is_on", new=False,
+    ):
+        assert STATE_OFF == binary_sensor.BinarySensorEntity().state
+    with mock.patch(
+        "homeassistant.components.binary_sensor.BinarySensorEntity.is_on", new=True,
+    ):
+        assert STATE_ON == binary_sensor.BinarySensorEntity().state
 
-    def test_state(self):
-        """Test binary sensor state."""
-        sensor = binary_sensor.BinarySensorDevice()
-        assert STATE_OFF == sensor.state
-        with mock.patch(
-            "homeassistant.components.binary_sensor.BinarySensorDevice.is_on",
-            new=False,
-        ):
-            assert STATE_OFF == binary_sensor.BinarySensorDevice().state
-        with mock.patch(
-            "homeassistant.components.binary_sensor.BinarySensorDevice.is_on", new=True,
-        ):
-            assert STATE_ON == binary_sensor.BinarySensorDevice().state
+
+def test_deprecated_base_class(caplog):
+    """Test deprecated base class."""
+
+    class CustomBinarySensor(binary_sensor.BinarySensorDevice):
+        pass
+
+    CustomBinarySensor()
+    assert "BinarySensorDevice is deprecated, modify CustomBinarySensor" in caplog.text