def test_tostring(self):
invoiceitem = InvoiceItem(plan="test", amount=50, stripe_id='inv_xxxxxxxx123456')
self.assertEquals("<amount=50, plan=test, stripe_id=inv_xxxxxxxx123456>", str(invoiceitem))
def test_plan_display(self):
invoiceitem = InvoiceItem(plan="test")
self.assertEqual("Test Plan 1", invoiceitem.plan_display())
