import { SystemEntity } from "../src/realm/entities/System";
import { migratev0 } from "../src/realm/migrations/MigrateV0";
import { migratev1 } from "../src/realm/migrations/MigrateV1";
import MockRealm from "../__mock__/mockRealmObject";

test('Realm migrates to V0', () => {
  let oldRealm = new MockRealm({schemaVersion: 0});
  let newRealm = new MockRealm({schemaVersion: 0});
  migratev0(oldRealm, newRealm);
  expect(newRealm.schemaVersion).toBe(0);
})

test('Realm migrates to V1', () => {
  let oldRealm = new MockRealm({schemaVersion: 0});
  let newRealm = new MockRealm({schemaVersion: 0});
  migratev0(oldRealm, newRealm);

  oldRealm = newRealm;
  newRealm = new MockRealm({schemaVersion: 1});
  migratev1(oldRealm, newRealm);

  expect(newRealm[SystemEntity.name][0].key).toBe('username');
  expect(newRealm[SystemEntity.name][0].value).toBe('changeme');
})

test('Realm halts V1 migration when schema is V2+', () => {
  let oldRealm = new MockRealm({schemaVersion: 2});
  newRealm = new MockRealm({schemaVersion: 1});
  migratev1(oldRealm, newRealm);
  oldRealm.create(SystemEntity.name, {key: 'key1', value: 'value'})

  expect(oldRealm[SystemEntity.name].length).toBe(1);
})