feat: add toggle to switch between Isar and Sqlite (#19953)

mobile/test/drift/main/generated/schema.dart

@@ -0,0 +1,23 @@
+// dart format width=80
+// GENERATED CODE, DO NOT EDIT BY HAND.
+// ignore_for_file: type=lint
+import 'package:drift/drift.dart';
+import 'package:drift/internal/migrations.dart';
+import 'schema_v1.dart' as v1;
+import 'schema_v2.dart' as v2;
+
+class GeneratedHelper implements SchemaInstantiationHelper {
+  @override
+  GeneratedDatabase databaseForVersion(QueryExecutor db, int version) {
+    switch (version) {
+      case 1:
+        return v1.DatabaseAtV1(db);
+      case 2:
+        return v2.DatabaseAtV2(db);
+      default:
+        throw MissingSchemaException(version, versions);
+    }
+  }
+
+  static const versions = const [1, 2];
+}

mobile/test/drift/main/migration_test.dart

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+// dart format width=80
+// ignore_for_file: unused_local_variable, unused_import
+import 'package:drift/drift.dart';
+import 'package:drift_dev/api/migrations_native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
+
+import 'generated/schema.dart';
+import 'generated/schema_v1.dart' as v1;
+import 'generated/schema_v2.dart' as v2;
+
+void main() {
+  driftRuntimeOptions.dontWarnAboutMultipleDatabases = true;
+  late SchemaVerifier verifier;
+
+  setUpAll(() {
+    verifier = SchemaVerifier(GeneratedHelper());
+  });
+
+  group('simple database migrations', () {
+    // These simple tests verify all possible schema updates with a simple (no
+    // data) migration. This is a quick way to ensure that written database
+    // migrations properly alter the schema.
+    const versions = GeneratedHelper.versions;
+    for (final (i, fromVersion) in versions.indexed) {
+      group('from $fromVersion', () {
+        for (final toVersion in versions.skip(i + 1)) {
+          test('to $toVersion', () async {
+            final schema = await verifier.schemaAt(fromVersion);
+            final db = Drift(schema.newConnection());
+            await verifier.migrateAndValidate(db, toVersion);
+            await db.close();
+          });
+        }
+      });
+    }
+  });
+}