BaseModelTest.java

public class BaseModelTest {
  public static FakeApplication app;

  @BeforeClass
  public static void startApp() {
    app = Helpers.fakeApplication(Helpers.inMemoryDatabase());
    Helpers.start(app);
  }

  @AfterClass
  public static void stopApp() {
    Helpers.stop(app);
  }
}

CompanyTest.java

public class CompanyTest extends BaseModelTest {
  @Test
  public void save() {
    Company company = new Company("My Company");
    company.save();
    assertThat(company.id).isNotNull();
  }
}