public void GivenOpenOrder_WhenCancelled_ShouldSucceed()
{
// Arrange
var order = new SalesOrder();
order.Open(new SalesOrderId(1), new CustomerId(2), new Address("1 Arnold Lane", "Elsewhere", new PostalCode("EL12", "1YY")), (decimal)7.5);
// Act
order.Cancel();
// Assert
Assert.AreEqual(SalesOrderStatus.Cancelled, order.Status);
}
public void GivenNonPendingOrder_WhenCancelled_ShouldFail()
{
// Arrange
var order = new SalesOrder();
order.Open(new SalesOrderId(1), new CustomerId(2), new Address("1 Arnold Lane", "Elsewhere", new PostalCode("EL12", "1YY")), (decimal)7.5);
order.Cancel();
// Act / Assert
Assert.Throws<InvalidOperationException>(order.Cancel);
}