Add device registry cleanup to github (#64380)

tests/components/github/test_init.py

@@ -0,0 +1,31 @@
+"""Test the GitHub init file."""
+from pytest import LogCaptureFixture
+
+from homeassistant.components.github import async_cleanup_device_registry
+from homeassistant.components.github.const import DOMAIN
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry, mock_device_registry
+
+
+async def test_device_registry_cleanup(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    caplog: LogCaptureFixture,
+) -> None:
+    """Test that we remove untracked repositories from the decvice registry."""
+    registry = mock_device_registry(hass)
+
+    device = registry.async_get_or_create(
+        identifiers={(DOMAIN, "test/repository")},
+        config_entry_id=mock_config_entry.entry_id,
+    )
+
+    assert registry.async_get_device({(DOMAIN, "test/repository")}) == device
+    await async_cleanup_device_registry(hass, mock_config_entry)
+
+    assert (
+        f"Unlinking device {device.id} for untracked repository test/repository from config entry {mock_config_entry.entry_id}"
+        in caplog.text
+    )
+    assert registry.async_get_device({(DOMAIN, "test/repository")}) is None