public void TestMethod()
{
var models = r.AddItem(model1);
_context.SaveChanges();
var dbItem = FindEqualModel(r, model1);
Assert.IsNotNull(dbItem);
Assert.AreEqual(dbSet.Count(), r.AllItems.Count());
r.DeleteItem(dbItem.Id);
_context.SaveChanges();
Assert.AreEqual(dbSet.Count(), r.AllItems.Count());
Assert.IsNull(FindEqualModel(r, model1));
r.AddItems(new T[] { model1, model2 });
_context.SaveChanges();
var dbItem1 = FindEqualModel(r, model1);
Assert.IsNotNull(dbItem1);
var dbItem2 = FindEqualModel(r, model2);
Assert.IsNotNull(dbItem2);
Assert.AreEqual(dbSet.Count(), r.AllItems.Count());
r.DeleteItem(dbItem1.Id);
_context.SaveChanges();
dbItem1 = FindEqualModel(r, model1);
Assert.IsNull(dbItem1);
Assert.AreEqual(dbSet.Count(), r.AllItems.Count());
ChangeModel(dbItem2);
var dbItem2m = FindEqualModel(r, dbItem2);
Assert.IsNotNull(dbItem2m);
r.DeleteItem(dbItem2m.Id);
dbItem2 = FindEqualModel(r, dbItem2m);
Assert.IsNull(dbItem2);
Assert.AreEqual(dbSet.Count(), r.AllItems.Count());
}
