public void GetStockFromCoordinates_ValidCoordinatesWithNonEmptyStock_ReturnsCorrespondingStock() { // arrange var coords = new Coordinates(7, 'F'); // act var stock = controlUnit.GetStockFromCoordinates(coords); var a = new Stock(new Product("Mattoni 250ml", 25), 5); Assert.AreEqual(new Stock(new Product("Mattoni 250ml", 25), 5), stock, "GetStockFromCoordinates(...) - for given valid coordinates the resulted stock does not equal the expected one"); }