public void build_invoice_with_nested_builders()
{
Invoice invoice = InvoiceBuilder.AnInvoice()
.WithRecipient(RecipientBuilder.ARecipient().WithAddress(AddressBuilder.AnAddress().WithCity("London")))
.WithInvoiceLines(InvoiceLineBuilder.AnInvoiceLine().WithProduct("Boots"),
InvoiceLineBuilder.AnInvoiceLine().WithProduct("Cape"))
.Build();
Assert.That(invoice.recipient.address.city, Is.EqualTo("London"));
Assert.That(invoice.lines.invoiceLines[1].product, Is.EqualTo("Cape"));
}