Test that recorder is not promoted to earlier stage in bootstrap (#142695)

Test that recorder is not promoted to earlier stage

homeassistant/bootstrap.py

@@ -171,8 +171,6 @@ FRONTEND_INTEGRATIONS = {
 # Stage 0 is divided into substages. Each substage has a name, a set of integrations and a timeout.
 # The substage containing recorder should have no timeout, as it could cancel a database migration.
 # Recorder freezes "recorder" timeout during a migration, but it does not freeze other timeouts.
-# The substages preceding it should also have no timeout, until we ensure that the recorder
-# is not accidentally promoted as a dependency of any of the integrations in them.
 # If we add timeouts to the frontend substages, we should make sure they don't apply in recovery mode.
 STAGE_0_INTEGRATIONS = (
     # Load logging and http deps as soon as possible

tests/test_bootstrap.py

@@ -1618,3 +1618,36 @@ async def test_no_base_platforms_loaded_before_recorder(hass: HomeAssistant) ->
     assert not problems, (
         f"Integrations that are setup before recorder implement base platforms: {problems}"
     )
+
+
+async def test_recorder_not_promoted(hass: HomeAssistant) -> None:
+    """Verify that recorder is not promoted to earlier than its own stage."""
+    integrations_before_recorder: set[str] = set()
+    for _, integrations, _ in bootstrap.STAGE_0_INTEGRATIONS:
+        if "recorder" in integrations:
+            break
+        integrations_before_recorder |= integrations
+    else:
+        pytest.fail("recorder not in stage 0")
+
+    integrations_or_excs = await loader.async_get_integrations(
+        hass, integrations_before_recorder
+    )
+    integrations: dict[str, Integration] = {}
+    for domain, integration in integrations_or_excs.items():
+        assert not isinstance(integrations_or_excs, Exception)
+        integrations[domain] = integration
+
+    integrations_all_dependencies = (
+        await loader.resolve_integrations_after_dependencies(
+            hass, integrations.values(), ignore_exceptions=True
+        )
+    )
+    all_integrations = integrations.copy()
+    all_integrations.update(
+        (domain, loader.async_get_loaded_integration(hass, domain))
+        for domains in integrations_all_dependencies.values()
+        for domain in domains
+    )
+
+    assert "recorder" not in all_integrations