public void DeletesAllContacts()
{
//given some existing contact
var contact1 = new Contact("Joao das Neves");
var contact2 = new Contact("Jonny of the Snows");
subject.SaveContact(contact1);
subject.SaveContact(contact2);
// When I delete all contacts
subject.DeleteAll();
// Then we're left with an empty table of contacts
var table = DB.Table <Contact>().ToList();
Assert.Empty(table);
}