[Fact] public void Reject_ShouldUnstageAllPendingChanges()
{
_inMemoryContext.Posts.Add(new BlogPost {
BlogPostId = Guid.NewGuid()
});
_inMemoryContext.ChangeTracker.Entries <BlogPost>().Select(e => e.State)
.Should().AllBeEquivalentTo(EntityState.Added,
"we haven't commited anything yet");
_unitOfWork.Reject();
_inMemoryContext.ChangeTracker.Entries <BlogPost>().Select(e => e.State)
.Should().AllBeEquivalentTo(EntityState.Unchanged,
"we called Reject()");
}