Test Autoreconciliation of posted move with just one line of zero

issue3208
review867002

invoice.py

@@ -1335,10 +1335,10 @@ class Invoice(Workflow, ModelSQL, ModelView):
         for invoice in invoices:
             invoice.set_number()
             moves.append(invoice.create_move())
-        Move.post(moves)
         cls.write(invoices, {
                 'state': 'posted',
                 })
+        Move.post(moves)
         for invoice in invoices:
             if invoice.type in ('out_invoice', 'out_credit_note'):
                 invoice.print_invoice()

tests/scenario_invoice.rst

@@ -266,3 +266,14 @@ Credit invoice with refund::
     >>> credit_note_tax_code.reload()
     >>> credit_note_tax_code.sum == Decimal(20)
     True
+
+Create empty invoice::
+
+    >>> invoice = Invoice()
+    >>> invoice.party = party
+    >>> invoice.payment_term = payment_term
+    >>> invoice.save()
+    >>> Invoice.post([invoice.id], config.context)
+    >>> invoice.reload()
+    >>> invoice.state
+    u'paid'