public async Task CreateDiaryTest()
{
var diaryName = "testdiary";
var isSecret = false;
var diary = await _diaryService.CreateDiaryInfoAsync(_user, diaryName, isSecret);
Assert.Equal(_user.Id, diary.Id);
Assert.Equal(_user.Email, diary.Owner);
Assert.Equal(diaryName, diary.DiaryName);
Assert.Equal(isSecret, diary.IsSecret);
Assert.Empty(diary.Writers);
Assert.Empty(diary.Viewers);
}