@Test
public void getAccessTokenSucceedsAndLaunchesMainActivity() {

    AccessToken accessToken = TestDataFactory.makeAccessToken();
    stubDataManagerGetAccessToken(Single.just(accessToken));
    mWelcomePresenter.getAccessToken("code");
    verify(mMockWelcomeMvpView).showLoadingState(true);
    verify(mMockWelcomeMvpView).launchMainActivity();
    verify(mMockWelcomeMvpView).showLoadingState(false);
}