@Test
public void testNotSalutAnswer() {
assertEquals(null, cell.ask(new Tweet("au revoir")));
}
@Test
public void testSalutAnswer() {
Tweet tweet = new Tweet("maitre_peter", "@sala_meche Salut Salamèche !");
assertEquals("@maitre_peter Sala Sala Salameeeeche #PokeBattle", cell.ask(tweet));
}
