drift/moor/test/ffi/vm_database_test.dart

import 'package:moor/ffi.dart';
import 'package:moor/moor.dart';
import 'package:sqlite3/sqlite3.dart';
import 'package:test/test.dart';

void main() {
  group('VmDatabase.opened', () {
    test('disposes the underlying database by default', () async {
      final underlying = sqlite3.openInMemory();
      final db = VmDatabase.opened(underlying);
      await db.ensureOpen(_FakeExecutorUser());
      await db.close();

      expect(() => underlying.execute('SELECT 1'), throwsStateError);
    });

    test('can avoid disposing the underlying instance', () async {
      final underlying = sqlite3.openInMemory();
      final db = VmDatabase.opened(underlying, closeUnderlyingOnClose: false);
      await db.ensureOpen(_FakeExecutorUser());
      await db.close();

      expect(() => underlying.execute('SELECT 1'), isNot(throwsA(anything)));
      underlying.dispose();
    });
  });
}

class _FakeExecutorUser extends QueryExecutorUser {
  @override
  Future<void> beforeOpen(QueryExecutor executor, OpeningDetails details) {
    return Future.value();
  }

  @override
  int get schemaVersion => 1;
}