Add websocket list APIs for the registries (#16597)

* Add websocket list APIs for the registries

* Remove identifiers

* Fix tests

* Use ordered dict

tests/components/config/test_device_registry.py

@@ -0,0 +1,60 @@
+"""Test entity_registry API."""
+import pytest
+
+from homeassistant.components.config import device_registry
+from tests.common import mock_device_registry
+
+
+@pytest.fixture
+def client(hass, hass_ws_client):
+    """Fixture that can interact with the config manager API."""
+    hass.loop.run_until_complete(device_registry.async_setup(hass))
+    yield hass.loop.run_until_complete(hass_ws_client(hass))
+
+
+@pytest.fixture
+def registry(hass):
+    """Return an empty, loaded, registry."""
+    return mock_device_registry(hass)
+
+
+async def test_list_devices(hass, client, registry):
+    """Test list entries."""
+    registry.async_get_or_create(
+        config_entry='1234',
+        connections={('ethernet', '12:34:56:78:90:AB:CD:EF')},
+        identifiers={('bridgeid', '0123')},
+        manufacturer='manufacturer', model='model')
+    registry.async_get_or_create(
+        config_entry='1234',
+        connections={},
+        identifiers={('bridgeid', '1234')},
+        manufacturer='manufacturer', model='model')
+
+    await client.send_json({
+        'id': 5,
+        'type': 'config/device_registry/list',
+    })
+    msg = await client.receive_json()
+
+    for entry in msg['result']:
+        entry.pop('id')
+
+    assert msg['result'] == [
+        {
+            'config_entries': ['1234'],
+            'connections': [['ethernet', '12:34:56:78:90:AB:CD:EF']],
+            'manufacturer': 'manufacturer',
+            'model': 'model',
+            'name': None,
+            'sw_version': None
+        },
+        {
+            'config_entries': ['1234'],
+            'connections': [],
+            'manufacturer': 'manufacturer',
+            'model': 'model',
+            'name': None,
+            'sw_version': None
+        }
+    ]