public void ShouldKnowHowToEditAModelByItsIdWhenItExists()
{
var book = new Book {Id = 1, Title = "The Book"};
var dbContext = new Mock<PukuDbContext>();
dbContext.Setup(ctx => ctx.SetModified(book));
var efRepo = new EntityFrameworkRepository(dbContext.Object);
efRepo.Edit(book);
dbContext.Verify(ctx => ctx.SetModified(book));
}