iv_and/invoice_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:sqflite/sqflite.dart';
import 'package:path_provider/path_provider.dart';
import 'db_helper.dart';
import 'invoice.dart';

void main() {
  group('Invoice Tests', () {
    late Database db;

    setUp(() async {
      final io.Directory documentsDirectory = await getApplicationDocumentsDirectory();
      String path = '${documentsDirectory.path}/test.db';
      db = await openDatabase(path, version: 1, onCreate: DbHelper()._onCreate);
    });

    tearDown(() async {
      await db.close();
      final io.Directory documentsDirectory = await getApplicationDocumentsDirectory();
      String path = '${documentsDirectory.path}/test.db';
      await io.File(path).delete();
    });

    test('Add and fetch invoice', () async {
      final invoice = Invoice(
        customerId: 1,
        date: DateTime.now().toIso8601String(),
        total: 90.0,
        tax: 9.0,
        discountTotal: 10.0,
      );

      await db.insert('invoices', invoice.toMap());

      final List<Map<String, dynamic>> maps = await db.query('invoices');
      expect(maps.length, 1);

      final fetchedInvoice = Invoice.fromMap(maps.first);
      expect(fetchedInvoice.customerId, 1);
    });
  });
}