Area registry (#20435)

* First draft of area registry

* Refactor based on input

* Add tests for areas
Add tests for updating device

* Updating a device shouldn't require area

* Fix Martins comment

* Require admin

* Save after deleting

* Rename read to list_areas
Fix device entry_dict
Remove area id from device when deleting area

* Fix tests

tests/components/config/test_area_registry.py

@@ -0,0 +1,155 @@
+"""Test area_registry API."""
+import pytest
+
+from homeassistant.components.config import area_registry
+from tests.common import mock_area_registry
+
+
+@pytest.fixture
+def client(hass, hass_ws_client):
+    """Fixture that can interact with the config manager API."""
+    hass.loop.run_until_complete(area_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_area_registry(hass)
+
+
+async def test_list_areas(hass, client, registry):
+    """Test list entries."""
+    registry.async_create('mock 1')
+    registry.async_create('mock 2')
+
+    await client.send_json({
+        'id': 1,
+        'type': 'config/area_registry/list',
+    })
+
+    msg = await client.receive_json()
+
+    assert len(msg['result']) == len(registry.areas)
+
+
+async def test_create_area(hass, client, registry):
+    """Test create entry."""
+    await client.send_json({
+        'id': 1,
+        'name': "mock",
+        'type': 'config/area_registry/create',
+    })
+
+    msg = await client.receive_json()
+
+    assert 'mock' in msg['result']['name']
+    assert len(registry.areas) == 1
+
+
+async def test_create_area_with_name_already_in_use(hass, client, registry):
+    """Test create entry that should fail."""
+    registry.async_create('mock')
+
+    await client.send_json({
+        'id': 1,
+        'name': "mock",
+        'type': 'config/area_registry/create',
+    })
+
+    msg = await client.receive_json()
+
+    assert not msg['success']
+    assert msg['error']['code'] == 'invalid_info'
+    assert msg['error']['message'] == "Name is already in use"
+    assert len(registry.areas) == 1
+
+
+async def test_delete_area(hass, client, registry):
+    """Test delete entry."""
+    area = registry.async_create('mock')
+
+    await client.send_json({
+        'id': 1,
+        'area_id': area.id,
+        'type': 'config/area_registry/delete',
+    })
+
+    msg = await client.receive_json()
+
+    assert msg['success']
+    assert not registry.areas
+
+
+async def test_delete_non_existing_area(hass, client, registry):
+    """Test delete entry that should fail."""
+    registry.async_create('mock')
+
+    await client.send_json({
+        'id': 1,
+        'area_id': '',
+        'type': 'config/area_registry/delete',
+    })
+
+    msg = await client.receive_json()
+
+    assert not msg['success']
+    assert msg['error']['code'] == 'invalid_info'
+    assert msg['error']['message'] == "Area ID doesn't exist"
+    assert len(registry.areas) == 1
+
+
+async def test_update_area(hass, client, registry):
+    """Test update entry."""
+    area = registry.async_create('mock 1')
+
+    await client.send_json({
+        'id': 1,
+        'area_id': area.id,
+        'name': "mock 2",
+        'type': 'config/area_registry/update',
+    })
+
+    msg = await client.receive_json()
+
+    assert msg['result']['area_id'] == area.id
+    assert msg['result']['name'] == 'mock 2'
+    assert len(registry.areas) == 1
+
+
+async def test_update_area_with_same_name(hass, client, registry):
+    """Test update entry."""
+    area = registry.async_create('mock 1')
+
+    await client.send_json({
+        'id': 1,
+        'area_id': area.id,
+        'name': "mock 1",
+        'type': 'config/area_registry/update',
+    })
+
+    msg = await client.receive_json()
+
+    assert msg['result']['area_id'] == area.id
+    assert msg['result']['name'] == 'mock 1'
+    assert len(registry.areas) == 1
+
+
+async def test_update_area_with_name_already_in_use(hass, client, registry):
+    """Test update entry."""
+    area = registry.async_create('mock 1')
+    registry.async_create('mock 2')
+
+    await client.send_json({
+        'id': 1,
+        'area_id': area.id,
+        'name': "mock 2",
+        'type': 'config/area_registry/update',
+    })
+
+    msg = await client.receive_json()
+
+    assert not msg['success']
+    assert msg['error']['code'] == 'invalid_info'
+    assert msg['error']['message'] == "Name is already in use"
+    assert len(registry.areas) == 2