private static Season CreateSeasonWithTeams(params Guid[] identities) { var season = new Season(); var seasonId = Guid.NewGuid(); season.Apply(new SeasonCreated(seasonId, "DummyName", DateTimeOffset.UtcNow)); foreach (var guidIdentity in identities) { season.Apply(new TeamAddedToSeason(seasonId, guidIdentity)); } return(season); }