func TestCanCountTheTweetsSentByAnUser(t *testing.T) {

    // Initialization
    service.InitializeService()

    var tweet, secondTweet, thirdTweet *domain.Tweet

    user := "grupoesfera"
    anotherUser := "nick"
    text := "This is my first tweet"
    secondText := "This is my second tweet"

    tweet = domain.NewTweet(user, text)
    secondTweet = domain.NewTweet(user, secondText)
    thirdTweet = domain.NewTweet(anotherUser, text)

    service.PublishTweet(tweet)
    service.PublishTweet(secondTweet)
    service.PublishTweet(thirdTweet)

    // Operation
    count := service.CountTweetsByUser(user)

    // Validation
    if count != 2 {
        t.Errorf("Expected count is 2 but was %d", count)
    }

}

func TestCanRetrieveTheTweetsSentByAnUser(t *testing.T) {

    // Initialization
    service.InitializeService()

    var tweet, secondTweet, thirdTweet *domain.Tweet

    user := "grupoesfera"
    anotherUser := "nick"
    text := "This is my first tweet"
    secondText := "This is my second tweet"

    tweet = domain.NewTweet(user, text)
    secondTweet = domain.NewTweet(user, secondText)
    thirdTweet = domain.NewTweet(anotherUser, text)

    firstId, _ := service.PublishTweet(tweet)
    secondId, _ := service.PublishTweet(secondTweet)
    service.PublishTweet(thirdTweet)

    // Operation
    tweets := service.GetTweetsByUser(user)

    // Validation
    if len(tweets) != 2 {

        t.Errorf("Expected size is 2 but was %d", len(tweets))
        return
    }

    firstPublishedTweet := tweets[0]
    secondPublishedTweet := tweets[1]

    if !isValidTweet(t, firstPublishedTweet, firstId, user, text) {
        return
    }

    if !isValidTweet(t, secondPublishedTweet, secondId, user, secondText) {
        return
    }

}