Improve test of config entry store (#105487)

* Improve test of config entry store

* Tweak test

tests/snapshots/test_config_entries.ambr

@@ -0,0 +1,18 @@
+# serializer version: 1
+# name: test_as_dict
+  dict({
+    'data': dict({
+    }),
+    'disabled_by': None,
+    'domain': 'test',
+    'entry_id': 'mock-entry',
+    'options': dict({
+    }),
+    'pref_disable_new_entities': False,
+    'pref_disable_polling': False,
+    'source': 'user',
+    'title': 'Mock Title',
+    'unique_id': None,
+    'version': 1,
+  })
+# ---

tests/test_config_entries.py

@@ -9,6 +9,7 @@ from typing import Any
 from unittest.mock import AsyncMock, Mock, patch
 
 import pytest
+from syrupy.assertion import SnapshotAssertion
 
 from homeassistant import config_entries, data_entry_flow, loader
 from homeassistant.components import dhcp
@@ -667,14 +668,43 @@ async def test_saving_and_loading(hass: HomeAssistant) -> None:
     for orig, loaded in zip(
         hass.config_entries.async_entries(), manager.async_entries()
     ):
-        assert orig.version == loaded.version
-        assert orig.domain == loaded.domain
-        assert orig.title == loaded.title
-        assert orig.data == loaded.data
-        assert orig.source == loaded.source
-        assert orig.unique_id == loaded.unique_id
-        assert orig.pref_disable_new_entities == loaded.pref_disable_new_entities
-        assert orig.pref_disable_polling == loaded.pref_disable_polling
+        assert orig.as_dict() == loaded.as_dict()
+
+
+async def test_as_dict(snapshot: SnapshotAssertion) -> None:
+    """Test ConfigEntry.as_dict."""
+
+    # Ensure as_dict is not overridden
+    assert MockConfigEntry.as_dict is config_entries.ConfigEntry.as_dict
+
+    excluded_from_dict = {
+        "supports_unload",
+        "supports_remove_device",
+        "state",
+        "_setup_lock",
+        "update_listeners",
+        "reason",
+        "_async_cancel_retry_setup",
+        "_on_unload",
+        "reload_lock",
+        "_reauth_lock",
+        "_tasks",
+        "_background_tasks",
+        "_integration_for_domain",
+        "_tries",
+        "_setup_again_job",
+    }
+
+    entry = MockConfigEntry(entry_id="mock-entry")
+
+    # Make sure the expected keys are present
+    dict_repr = entry.as_dict()
+    for key in config_entries.ConfigEntry.__slots__:
+        assert key in dict_repr or key in excluded_from_dict
+        assert not (key in dict_repr and key in excluded_from_dict)
+
+    # Make sure the dict representation is as expected
+    assert dict_repr == snapshot
 
 
 async def test_forward_entry_sets_up_component(hass: HomeAssistant) -> None: