fix: update test fixtures for SQLite storage migration

All store tests were passing file paths instead of Database objects
after the JSON-to-SQLite migration. Updated fixtures to create temp
Database instances, rewrote backup e2e tests for binary .db format,
and fixed config tests for the simplified StorageConfig.

server/tests/api/routes/test_devices_routes.py

@@ -30,13 +30,21 @@ def _make_app():
 
 
 @pytest.fixture
-def device_store(tmp_path):
-    return DeviceStore(tmp_path / "devices.json")
+def _route_db(tmp_path):
+    from wled_controller.storage.database import Database
+    db = Database(tmp_path / "test.db")
+    yield db
+    db.close()
 
 
 @pytest.fixture
-def output_target_store(tmp_path):
-    return OutputTargetStore(str(tmp_path / "output_targets.json"))
+def device_store(_route_db):
+    return DeviceStore(_route_db)
+
+
+@pytest.fixture
+def output_target_store(_route_db):
+    return OutputTargetStore(_route_db)
 
 
 @pytest.fixture

server/tests/conftest.py

@@ -5,6 +5,7 @@ from datetime import datetime, timezone
 import pytest
 
 from wled_controller.config import Config, StorageConfig, ServerConfig, AuthConfig
+from wled_controller.storage.database import Database
 from wled_controller.storage.device_store import Device, DeviceStore
 from wled_controller.storage.sync_clock import SyncClock
 from wled_controller.storage.sync_clock_store import SyncClockStore
@@ -37,12 +38,25 @@ def test_config_dir(tmp_path):
 
 @pytest.fixture
 def temp_store_dir(tmp_path):
-    """Provide a temp directory for JSON store files, cleaned up after tests."""
+    """Provide a temp directory for store files, cleaned up after tests."""
     d = tmp_path / "stores"
     d.mkdir(parents=True, exist_ok=True)
     return d
 
 
+# ---------------------------------------------------------------------------
+# Database fixture
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture
+def tmp_db(tmp_path):
+    """Provide a temporary SQLite Database instance."""
+    db = Database(tmp_path / "test.db")
+    yield db
+    db.close()
+
+
 # ---------------------------------------------------------------------------
 # Config fixtures
 # ---------------------------------------------------------------------------
@@ -55,20 +69,7 @@ def test_config(tmp_path):
     data_dir.mkdir(parents=True, exist_ok=True)
 
     storage = StorageConfig(
-        devices_file=str(data_dir / "devices.json"),
-        templates_file=str(data_dir / "capture_templates.json"),
-        postprocessing_templates_file=str(data_dir / "postprocessing_templates.json"),
-        picture_sources_file=str(data_dir / "picture_sources.json"),
-        output_targets_file=str(data_dir / "output_targets.json"),
-        pattern_templates_file=str(data_dir / "pattern_templates.json"),
-        color_strip_sources_file=str(data_dir / "color_strip_sources.json"),
-        audio_sources_file=str(data_dir / "audio_sources.json"),
-        audio_templates_file=str(data_dir / "audio_templates.json"),
-        value_sources_file=str(data_dir / "value_sources.json"),
-        automations_file=str(data_dir / "automations.json"),
-        scene_presets_file=str(data_dir / "scene_presets.json"),
-        color_strip_processing_templates_file=str(data_dir / "color_strip_processing_templates.json"),
-        sync_clocks_file=str(data_dir / "sync_clocks.json"),
+        database_file=str(data_dir / "test.db"),
     )
 
     return Config(
@@ -84,33 +85,33 @@ def test_config(tmp_path):
 
 
 @pytest.fixture
-def device_store(temp_store_dir):
-    """Provide a DeviceStore backed by a temp file."""
-    return DeviceStore(temp_store_dir / "devices.json")
+def device_store(tmp_db):
+    """Provide a DeviceStore backed by a temp database."""
+    return DeviceStore(tmp_db)
 
 
 @pytest.fixture
-def sync_clock_store(temp_store_dir):
-    """Provide a SyncClockStore backed by a temp file."""
-    return SyncClockStore(str(temp_store_dir / "sync_clocks.json"))
+def sync_clock_store(tmp_db):
+    """Provide a SyncClockStore backed by a temp database."""
+    return SyncClockStore(tmp_db)
 
 
 @pytest.fixture
-def output_target_store(temp_store_dir):
-    """Provide an OutputTargetStore backed by a temp file."""
-    return OutputTargetStore(str(temp_store_dir / "output_targets.json"))
+def output_target_store(tmp_db):
+    """Provide an OutputTargetStore backed by a temp database."""
+    return OutputTargetStore(tmp_db)
 
 
 @pytest.fixture
-def automation_store(temp_store_dir):
-    """Provide an AutomationStore backed by a temp file."""
-    return AutomationStore(str(temp_store_dir / "automations.json"))
+def automation_store(tmp_db):
+    """Provide an AutomationStore backed by a temp database."""
+    return AutomationStore(tmp_db)
 
 
 @pytest.fixture
-def value_source_store(temp_store_dir):
-    """Provide a ValueSourceStore backed by a temp file."""
-    return ValueSourceStore(str(temp_store_dir / "value_sources.json"))
+def value_source_store(tmp_db):
+    """Provide a ValueSourceStore backed by a temp database."""
+    return ValueSourceStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------

server/tests/core/test_automation_engine.py

@@ -25,8 +25,8 @@ from wled_controller.storage.automation_store import AutomationStore
 
 
 @pytest.fixture
-def mock_store(tmp_path) -> AutomationStore:
-    return AutomationStore(str(tmp_path / "auto.json"))
+def mock_store(tmp_db) -> AutomationStore:
+    return AutomationStore(tmp_db)
 
 
 @pytest.fixture

server/tests/e2e/conftest.py

@@ -46,10 +46,12 @@ def client(_test_client):
 
 def _clear_stores():
     """Remove all entities from all stores for test isolation."""
-    # Reset the saves-frozen flag that freeze_saves() sets during restore flows.
-    # Without this, subsequent tests can't persist data because _save() is a no-op.
+    # Reset frozen-writes flags that restore flows set.
+    # Without this, subsequent tests can't persist data.
     from wled_controller.storage.base_store import unfreeze_saves
     unfreeze_saves()
+    import wled_controller.storage.database as _db_mod
+    _db_mod._writes_frozen = False
 
     from wled_controller.api import dependencies as deps
 

server/tests/e2e/test_backup_flow.py

@@ -1,11 +1,9 @@
 """E2E: Backup and restore flow.
 
-Tests creating entities, backing up, deleting, then restoring from backup.
+Tests creating entities, backing up (SQLite .db file), deleting, then restoring.
 """
 
 import io
-import json
-
 
 
 class TestBackupRestoreFlow:
@@ -42,20 +40,12 @@ class TestBackupRestoreFlow:
         resp = client.get("/api/v1/color-strip-sources")
         assert resp.json()["count"] == 1
 
-        # 2. Create a backup (GET returns a JSON file)
+        # 2. Create a backup (GET returns a SQLite .db file)
         resp = client.get("/api/v1/system/backup")
         assert resp.status_code == 200
-        backup_data = resp.json()
-        assert backup_data["meta"]["format"] == "ledgrab-backup"
-        assert "stores" in backup_data
-        assert "devices" in backup_data["stores"]
-        assert "color_strip_sources" in backup_data["stores"]
-
-        # Verify device is in the backup.
-        # Store files have structure: {"version": "...", "devices": {id: {...}}}
-        devices_store = backup_data["stores"]["devices"]
-        assert "devices" in devices_store
-        assert len(devices_store["devices"]) == 1
+        backup_bytes = resp.content
+        # SQLite files start with this magic header
+        assert backup_bytes[:16].startswith(b"SQLite format 3")
 
         # 3. Delete all created entities
         resp = client.delete(f"/api/v1/color-strip-sources/{css_id}")
@@ -69,52 +59,37 @@ class TestBackupRestoreFlow:
         resp = client.get("/api/v1/color-strip-sources")
         assert resp.json()["count"] == 0
 
-        # 4. Restore from backup (POST with the backup JSON as a file upload)
-        backup_bytes = json.dumps(backup_data).encode("utf-8")
+        # 4. Restore from backup (POST with the .db file upload)
         resp = client.post(
             "/api/v1/system/restore",
-            files={"file": ("backup.json", io.BytesIO(backup_bytes), "application/json")},
+            files={"file": ("backup.db", io.BytesIO(backup_bytes), "application/octet-stream")},
         )
         assert resp.status_code == 200, f"Restore failed: {resp.text}"
         restore_result = resp.json()
         assert restore_result["status"] == "restored"
-        assert restore_result["stores_written"] > 0
-
-        # 5. After restore, stores are written to disk but the in-memory
-        # stores haven't been re-loaded (normally a server restart does that).
-        # Verify the backup file was written correctly by reading it back.
-        # The restore endpoint writes JSON files; we check the response confirms success.
         assert restore_result["restart_scheduled"] is True
 
-    def test_backup_contains_all_store_keys(self, client):
-        """Backup response includes entries for all known store types."""
+    def test_backup_is_valid_sqlite(self, client):
+        """Backup response is a valid SQLite database file."""
         resp = client.get("/api/v1/system/backup")
         assert resp.status_code == 200
-        stores = resp.json()["stores"]
-        # At minimum, these critical stores should be present
-        expected_keys = {
-            "devices", "output_targets", "color_strip_sources",
-            "capture_templates", "value_sources",
-        }
-        assert expected_keys.issubset(set(stores.keys()))
+        assert resp.content[:16].startswith(b"SQLite format 3")
+        # Should have Content-Disposition header for download
+        assert "attachment" in resp.headers.get("content-disposition", "")
 
     def test_restore_rejects_invalid_format(self, client):
-        """Uploading a non-backup JSON file should fail validation."""
-        bad_data = json.dumps({"not": "a backup"}).encode("utf-8")
+        """Uploading a non-SQLite file should fail validation."""
+        bad_data = b"not a database file at all, just random text content"
         resp = client.post(
             "/api/v1/system/restore",
-            files={"file": ("bad.json", io.BytesIO(bad_data), "application/json")},
+            files={"file": ("bad.db", io.BytesIO(bad_data), "application/octet-stream")},
         )
         assert resp.status_code == 400
 
-    def test_restore_rejects_empty_stores(self, client):
-        """A backup with no recognized stores should fail."""
-        bad_backup = {
-            "meta": {"format": "ledgrab-backup", "format_version": 1},
-            "stores": {"unknown_store": {}},
-        }
+    def test_restore_rejects_empty_file(self, client):
+        """A tiny file should fail validation."""
         resp = client.post(
             "/api/v1/system/restore",
-            files={"file": ("bad.json", io.BytesIO(json.dumps(bad_backup).encode()), "application/json")},
+            files={"file": ("tiny.db", io.BytesIO(b"x" * 50), "application/octet-stream")},
         )
         assert resp.status_code == 400

server/tests/storage/test_automation_store.py

@@ -18,8 +18,8 @@ from wled_controller.storage.automation_store import AutomationStore
 
 
 @pytest.fixture
-def store(tmp_path) -> AutomationStore:
-    return AutomationStore(str(tmp_path / "automations.json"))
+def store(tmp_db) -> AutomationStore:
+    return AutomationStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------
@@ -240,16 +240,18 @@ class TestAutomationNameUniqueness:
 
 class TestAutomationPersistence:
     def test_persist_and_reload(self, tmp_path):
-        path = str(tmp_path / "auto_persist.json")
-        s1 = AutomationStore(path)
+        from wled_controller.storage.database import Database
+        db = Database(tmp_path / "auto_persist.db")
+        s1 = AutomationStore(db)
         a = s1.create_automation(
             name="Persist",
             conditions=[WebhookCondition(token="t1")],
         )
         aid = a.id
 
-        s2 = AutomationStore(path)
+        s2 = AutomationStore(db)
         loaded = s2.get_automation(aid)
         assert loaded.name == "Persist"
         assert len(loaded.conditions) == 1
         assert isinstance(loaded.conditions[0], WebhookCondition)
+        db.close()

server/tests/storage/test_device_store.py

@@ -14,13 +14,16 @@ from wled_controller.storage.device_store import Device, DeviceStore
 
 
 @pytest.fixture
-def temp_storage(tmp_path) -> Path:
-    return tmp_path / "devices.json"
+def tmp_db(tmp_path):
+    from wled_controller.storage.database import Database
+    db = Database(tmp_path / "test.db")
+    yield db
+    db.close()
 
 
 @pytest.fixture
-def store(temp_storage) -> DeviceStore:
-    return DeviceStore(temp_storage)
+def store(tmp_db) -> DeviceStore:
+    return DeviceStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------
@@ -240,23 +243,29 @@ class TestDeviceNameUniqueness:
 
 
 class TestDevicePersistence:
-    def test_persistence_across_instances(self, temp_storage):
-        s1 = DeviceStore(temp_storage)
+    def test_persistence_across_instances(self, tmp_path):
+        from wled_controller.storage.database import Database
+        db = Database(tmp_path / "persist.db")
+        s1 = DeviceStore(db)
         d = s1.create_device(name="Persist", url="http://p", led_count=77)
         did = d.id
 
-        s2 = DeviceStore(temp_storage)
+        s2 = DeviceStore(db)
         loaded = s2.get_device(did)
         assert loaded.name == "Persist"
         assert loaded.led_count == 77
+        db.close()
 
-    def test_update_persists(self, temp_storage):
-        s1 = DeviceStore(temp_storage)
+    def test_update_persists(self, tmp_path):
+        from wled_controller.storage.database import Database
+        db = Database(tmp_path / "persist2.db")
+        s1 = DeviceStore(db)
         d = s1.create_device(name="Before", url="http://x", led_count=10)
         s1.update_device(d.id, name="After")
 
-        s2 = DeviceStore(temp_storage)
+        s2 = DeviceStore(db)
         assert s2.get_device(d.id).name == "After"
+        db.close()
 
 
 # ---------------------------------------------------------------------------
@@ -266,7 +275,9 @@ class TestDevicePersistence:
 
 class TestDeviceThreadSafety:
     def test_concurrent_creates(self, tmp_path):
-        s = DeviceStore(tmp_path / "conc.json")
+        from wled_controller.storage.database import Database
+        db = Database(tmp_path / "conc.db")
+        s = DeviceStore(db)
         errors = []
 
         def _create(i):

server/tests/storage/test_output_target_store.py

@@ -11,8 +11,8 @@ from wled_controller.storage.key_colors_output_target import (
 
 
 @pytest.fixture
-def store(tmp_path) -> OutputTargetStore:
-    return OutputTargetStore(str(tmp_path / "output_targets.json"))
+def store(tmp_db) -> OutputTargetStore:
+    return OutputTargetStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------
@@ -193,8 +193,10 @@ class TestOutputTargetQueries:
 
 class TestOutputTargetPersistence:
     def test_persist_and_reload(self, tmp_path):
-        path = str(tmp_path / "ot_persist.json")
-        s1 = OutputTargetStore(path)
+        from wled_controller.storage.database import Database
+        db_path = str(tmp_path / "ot_persist.db")
+        db = Database(db_path)
+        s1 = OutputTargetStore(db)
         t = s1.create_target(
             "Persist", "led",
             device_id="dev_1",
@@ -203,8 +205,9 @@ class TestOutputTargetPersistence:
         )
         tid = t.id
 
-        s2 = OutputTargetStore(path)
+        s2 = OutputTargetStore(db)
         loaded = s2.get_target(tid)
         assert loaded.name == "Persist"
         assert isinstance(loaded, WledOutputTarget)
         assert loaded.tags == ["tv"]
+        db.close()

server/tests/storage/test_sync_clock_store.py

@@ -7,8 +7,8 @@ from wled_controller.storage.sync_clock_store import SyncClockStore
 
 
 @pytest.fixture
-def store(tmp_path) -> SyncClockStore:
-    return SyncClockStore(str(tmp_path / "sync_clocks.json"))
+def store(tmp_db) -> SyncClockStore:
+    return SyncClockStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------
@@ -149,12 +149,14 @@ class TestSyncClockNameUniqueness:
 
 class TestSyncClockPersistence:
     def test_persist_and_reload(self, tmp_path):
-        path = str(tmp_path / "sc_persist.json")
-        s1 = SyncClockStore(path)
+        from wled_controller.storage.database import Database
+        db = Database(tmp_path / "sc_persist.db")
+        s1 = SyncClockStore(db)
         c = s1.create_clock(name="Persist", speed=2.5)
         cid = c.id
 
-        s2 = SyncClockStore(path)
+        s2 = SyncClockStore(db)
         loaded = s2.get_clock(cid)
         assert loaded.name == "Persist"
         assert loaded.speed == 2.5
+        db.close()

server/tests/storage/test_value_source_store.py

@@ -14,8 +14,8 @@ from wled_controller.storage.value_source_store import ValueSourceStore
 
 
 @pytest.fixture
-def store(tmp_path) -> ValueSourceStore:
-    return ValueSourceStore(str(tmp_path / "value_sources.json"))
+def store(tmp_db) -> ValueSourceStore:
+    return ValueSourceStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------
@@ -247,13 +247,15 @@ class TestValueSourceNameUniqueness:
 
 class TestValueSourcePersistence:
     def test_persist_and_reload(self, tmp_path):
-        path = str(tmp_path / "vs_persist.json")
-        s1 = ValueSourceStore(path)
+        from wled_controller.storage.database import Database
+        db = Database(tmp_path / "vs_persist.db")
+        s1 = ValueSourceStore(db)
         src = s1.create_source("Persist", "static", value=0.42)
         sid = src.id
 
-        s2 = ValueSourceStore(path)
+        s2 = ValueSourceStore(db)
         loaded = s2.get_source(sid)
         assert loaded.name == "Persist"
         assert isinstance(loaded, StaticValueSource)
         assert loaded.value == 0.42
+        db.close()

server/tests/test_config.py

@@ -21,8 +21,7 @@ class TestDefaultConfig:
 
     def test_default_storage_paths(self):
         config = Config()
-        assert config.storage.devices_file == "data/devices.json"
-        assert config.storage.sync_clocks_file == "data/sync_clocks.json"
+        assert config.storage.database_file == "data/ledgrab.db"
 
     def test_default_mqtt_disabled(self):
         config = Config()
@@ -73,12 +72,11 @@ class TestServerConfig:
 class TestDemoMode:
     def test_demo_rewrites_storage_paths(self):
         config = Config(demo=True)
-        assert config.storage.devices_file.startswith("data/demo/")
-        assert config.storage.sync_clocks_file.startswith("data/demo/")
+        assert config.storage.database_file.startswith("data/demo/")
 
     def test_non_demo_keeps_original_paths(self):
         config = Config(demo=False)
-        assert config.storage.devices_file == "data/devices.json"
+        assert config.storage.database_file == "data/ledgrab.db"
 
 
 class TestGlobalConfig:

server/tests/test_device_store.py

@@ -2,19 +2,22 @@
 
 import pytest
 
+from wled_controller.storage.database import Database
 from wled_controller.storage.device_store import Device, DeviceStore
 
 
 @pytest.fixture
-def temp_storage(tmp_path):
-    """Provide temporary storage file."""
-    return tmp_path / "devices.json"
+def tmp_db(tmp_path):
+    """Provide a temporary SQLite Database instance."""
+    db = Database(tmp_path / "test.db")
+    yield db
+    db.close()
 
 
 @pytest.fixture
-def device_store(temp_storage):
+def device_store(tmp_db):
     """Provide device store instance."""
-    return DeviceStore(temp_storage)
+    return DeviceStore(tmp_db)
 
 
 def test_device_creation():
@@ -207,10 +210,11 @@ def test_device_exists(device_store):
     assert device_store.device_exists("nonexistent") is False
 
 
-def test_persistence(temp_storage):
+def test_persistence(tmp_path):
     """Test device persistence across store instances."""
+    db = Database(tmp_path / "persist.db")
     # Create store and add device
-    store1 = DeviceStore(temp_storage)
+    store1 = DeviceStore(db)
     device = store1.create_device(
         name="Test WLED",
         url="http://192.168.1.100",
@@ -218,14 +222,15 @@ def test_persistence(temp_storage):
     )
     device_id = device.id
 
-    # Create new store instance (loads from file)
-    store2 = DeviceStore(temp_storage)
+    # Create new store instance (loads from database)
+    store2 = DeviceStore(db)
 
     # Verify device persisted
     loaded_device = store2.get_device(device_id)
     assert loaded_device is not None
     assert loaded_device.name == "Test WLED"
     assert loaded_device.led_count == 150
+    db.close()
 
 
 def test_clear(device_store):