public void ChangeItemTest()
{
var repo = new MarksRepository(_context);
var item = new Mark
{
Student = _context.Students.FirstOrDefault(),
TeachSubj = _context.TeachSubjs.FirstOrDefault(),
StudentsMark = 77
};
repo.AddItem(item);
int Id = _context.Marks.FirstOrDefault(x => x.Student.Id == item.Student.Id &&
x.TeachSubj.Id == item.TeachSubj.Id &&
x.StudentsMark == item.StudentsMark).Id;
var newitem = repo.GetItem(Id);
newitem.StudentsMark = 83;
repo.ChangeItem(newitem);
var gotitem = repo.GetItem(Id);
Assert.AreEqual(newitem.Student.Id, gotitem.Student.Id);
Assert.AreEqual(newitem.StudentsMark, gotitem.StudentsMark);
Assert.AreEqual(newitem.TeachSubj.TeacherId, gotitem.TeachSubj.TeacherId);
Assert.AreEqual(newitem.TeachSubj.SubjId, gotitem.TeachSubj.SubjId);
_context.Marks.Remove(newitem);
}