public async Task DeleteDraft()
{
var siteId = await MakeSite().ConfigureAwait(false);
using var api = CreateApi();
MyPage page = await MyPage.CreateAsync(api).ConfigureAwait(false);
page.SiteId = siteId;
page.Title = "Startpage";
page.Text = "Welcome";
page.IsHidden = true;
page.Published = DateTime.Now;
await PageRepository.Save(page).ConfigureAwait(false);
await PageRepository.SaveDraft(page).ConfigureAwait(false);
var draftId = page.Id;
await PageRepository.DeleteDraft(draftId).ConfigureAwait(false);
var retrieved = await PageRepository.GetDraftById <MyPage>(draftId).ConfigureAwait(false);
Assert.IsNull(retrieved);
}