public async Task DemoteRank_Should_Decrease_Rank_Correctly()
{
using var context = await this.GetDatabase();
var mapper = this.GetMapper();
var characterService = new CharacterService(context, mapper);
var raidService = new RaidService(context, characterService, mapper);
var guildService = new GuildService(null, context, raidService, characterService, mapper);
await guildService.DemoteRankAsync("2");
var expected = "1";
var actual = context.Characters.First(ch => ch.Id == "2").RankId;
Assert.Equal(expected, actual);
}