public async Task UpdateDiary_ChangeContents()
{
var date = DateTime.Today;
var text = "test content";
var content = await _diaryService.WriteDiaryAsync(_user, _diary, date, text);
content.Text = "modified content";
await _diaryService.UpdateDiaryAsync(_user, _diary, new List <DiaryContent> {
content
});
var view = await _diaryService.GetDiaryViewAsync(_user, _diary, date);
var modified = view.DiaryContents.First();
Assert.Equal(content.Text, modified.Text);
}