chore: Move the drift_offline_first to legacy in favor of Serverpod implementation (#32)

legacy/drift_offline_sync/test/two_databases_test.dart

@@ -0,0 +1,47 @@
+@Skip('Skipping two databases test until migrations are implemented.')
+library;
+
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:test/test.dart';
+
+import 'utils/migration.dart';
+
+void main() {
+  test('Two databases with different schema versions 1-2', () async {
+    final executor = NativeDatabase.memory();
+    final first = FirstDb(executor);
+    final second = SecondDb(executor);
+
+    // Trigger the migration.
+    await first.managers.todosTable.create(
+      (t) => t.call(content: 'test'),
+    );
+
+    expect(first.created, isTrue);
+    expect(first.didUpgrade, isFalse);
+    expect(first.onBeforeOpen, isTrue);
+
+    // Trigger the migration.
+    await second.managers.users.create(
+      (t) => t.call(name: 'John Doe', profilePicture: Uint8List(10)),
+    );
+
+    expect(second.created, isTrue);
+    expect(second.onBeforeOpen, isTrue);
+    expect(second.didUpgrade, isTrue);
+  });
+
+  test('Two databases with different schema versions 2-1', () async {
+    final executor = NativeDatabase.memory();
+    final second = SecondDb(executor);
+    final first = FirstDb(executor);
+
+    // Trigger the migration.
+    final _ = second.users.all();
+    expect(second.didUpgrade, isFalse);
+
+    final _ = first.todosTable.all();
+    expect(first.didUpgrade, isTrue);
+  });
+}