Automatically recover when the sqlite3 database is malformed or corrupted (#37949)

* Validate sqlite database on startup and move away if corruption is detected.

* do not switch context in test -- its all sync

tests/components/recorder/test_util.py

@@ -1,8 +1,10 @@
 """Test util methods."""
+import os
+
 import pytest
 
 from homeassistant.components.recorder import util
-from homeassistant.components.recorder.const import DATA_INSTANCE
+from homeassistant.components.recorder.const import DATA_INSTANCE, SQLITE_URL_PREFIX
 
 from tests.async_mock import MagicMock, patch
 from tests.common import get_test_home_assistant, init_recorder_component
@@ -60,3 +62,31 @@ def test_recorder_bad_execute(hass_recorder):
         util.execute((mck1,), to_native=True)
 
     assert e_mock.call_count == 2
+
+
+def test_validate_or_move_away_sqlite_database(hass, tmpdir, caplog):
+    """Ensure a malformed sqlite database is moved away."""
+
+    test_dir = tmpdir.mkdir("test_validate_or_move_away_sqlite_database")
+    test_db_file = f"{test_dir}/broken.db"
+    dburl = f"{SQLITE_URL_PREFIX}{test_db_file}"
+
+    util.validate_sqlite_database(test_db_file) is True
+
+    assert os.path.exists(test_db_file) is True
+    assert util.validate_or_move_away_sqlite_database(dburl) is True
+
+    _corrupt_db_file(test_db_file)
+
+    assert util.validate_or_move_away_sqlite_database(dburl) is False
+
+    assert "corrupt or malformed" in caplog.text
+
+    assert util.validate_or_move_away_sqlite_database(dburl) is True
+
+
+def _corrupt_db_file(test_db_file):
+    """Corrupt an sqlite3 database file."""
+    f = open(test_db_file, "a")
+    f.write("I am a corrupt db")
+    f.close()