Allow renaming entities in entity registry (#12636)

* Allow renaming entities in entity registry

* Lint

tests/components/config/test_entity_registry.py

@@ -0,0 +1,134 @@
+"""Test entity_registry API."""
+import pytest
+
+from homeassistant.setup import async_setup_component
+from homeassistant.helpers.entity_registry import RegistryEntry
+from homeassistant.components.config import entity_registry
+from tests.common import mock_registry, MockEntity, MockEntityPlatform
+
+
+@pytest.fixture
+def client(hass, test_client):
+    """Fixture that can interact with the config manager API."""
+    hass.loop.run_until_complete(async_setup_component(hass, 'http', {}))
+    hass.loop.run_until_complete(entity_registry.async_setup(hass))
+    yield hass.loop.run_until_complete(test_client(hass.http.app))
+
+
+async def test_get_entity(hass, client):
+    """Test get entry."""
+    mock_registry(hass, {
+        'test_domain.name': RegistryEntry(
+            entity_id='test_domain.name',
+            unique_id='1234',
+            platform='test_platform',
+            name='Hello World'
+        ),
+        'test_domain.no_name': RegistryEntry(
+            entity_id='test_domain.no_name',
+            unique_id='6789',
+            platform='test_platform',
+        ),
+    })
+
+    resp = await client.get(
+        '/api/config/entity_registry/test_domain.name')
+    assert resp.status == 200
+    data = await resp.json()
+    assert data == {
+        'entity_id': 'test_domain.name',
+        'name': 'Hello World'
+    }
+
+    resp = await client.get(
+        '/api/config/entity_registry/test_domain.no_name')
+    assert resp.status == 200
+    data = await resp.json()
+    assert data == {
+        'entity_id': 'test_domain.no_name',
+        'name': None
+    }
+
+
+async def test_update_entity(hass, client):
+    """Test get entry."""
+    mock_registry(hass, {
+        'test_domain.world': RegistryEntry(
+            entity_id='test_domain.world',
+            unique_id='1234',
+            # Using component.async_add_entities is equal to platform "domain"
+            platform='test_platform',
+            name='before update'
+        )
+    })
+    platform = MockEntityPlatform(hass)
+    entity = MockEntity(unique_id='1234')
+    await platform.async_add_entities([entity])
+
+    state = hass.states.get('test_domain.world')
+    assert state is not None
+    assert state.name == 'before update'
+
+    resp = await client.post(
+        '/api/config/entity_registry/test_domain.world', json={
+            'name': 'after update'
+        })
+    assert resp.status == 200
+    data = await resp.json()
+    assert data == {
+        'entity_id': 'test_domain.world',
+        'name': 'after update'
+    }
+
+    state = hass.states.get('test_domain.world')
+    assert state.name == 'after update'
+
+
+async def test_update_entity_no_changes(hass, client):
+    """Test get entry."""
+    mock_registry(hass, {
+        'test_domain.world': RegistryEntry(
+            entity_id='test_domain.world',
+            unique_id='1234',
+            # Using component.async_add_entities is equal to platform "domain"
+            platform='test_platform',
+            name='name of entity'
+        )
+    })
+    platform = MockEntityPlatform(hass)
+    entity = MockEntity(unique_id='1234')
+    await platform.async_add_entities([entity])
+
+    state = hass.states.get('test_domain.world')
+    assert state is not None
+    assert state.name == 'name of entity'
+
+    resp = await client.post(
+        '/api/config/entity_registry/test_domain.world', json={
+            'name': 'name of entity'
+        })
+    assert resp.status == 200
+    data = await resp.json()
+    assert data == {
+        'entity_id': 'test_domain.world',
+        'name': 'name of entity'
+    }
+
+    state = hass.states.get('test_domain.world')
+    assert state.name == 'name of entity'
+
+
+async def test_get_nonexisting_entity(client):
+    """Test get entry."""
+    resp = await client.get(
+        '/api/config/entity_registry/test_domain.non_existing')
+    assert resp.status == 404
+
+
+async def test_update_nonexisting_entity(client):
+    """Test get entry."""
+    resp = await client.post(
+        '/api/config/entity_registry/test_domain.non_existing', json={
+            'name': 'some name'
+        })
+    assert resp.status == 404