public void DeleteBillFromOrderTest()
{
//Check Setup
db = new touch_for_foodEntities();
Assert.IsFalse(db.bills.Find(bill1.id) == null);
//Arrange
BillController target = new BillController();
int numberOfTotalBillsBefore = db.orders.SelectMany(o => o.bills).ToList<bill>().Count();
int expected = 1;
//Act
int actual = target.DeleteBillFromOrder(bill1.id);
//Assert
db = new touch_for_foodEntities();
int numberOfTotalBillsAfter = db.orders.SelectMany(o => o.bills).ToList<bill>().Count();
Assert.AreEqual(expected, actual);
Assert.IsTrue((numberOfTotalBillsBefore - 1) == numberOfTotalBillsAfter);
Assert.IsTrue(db.bills.Find(bill1.id) == null);
}
