James Healy's Profile

Ryan's suggested approach makes testing PDFs a breeze.

Create a new unit spec for the OrderPdf class and focus on the #render() method.

As a simple first step, spec that the render() methods returns a string that starts with "%PDF" to make sure it's generating a PDF.

To improve the specs, I'd check the PDF contains the appropriate text.

pdf    = OrderPdf.new
reader = PDF::Reader.new(StringIO.new(pdf.render))
page   = reader.page(1)

page.should include("order #1")