Re-enable and fix invoice PDF test

And it's passing :-)

ref #76

coin/billing/tests.py

@@ -142,31 +142,31 @@ class BillingInvoiceCreationTests(TestCase):
 
 class BillingTests(TestCase):
 
-    # def test_download_invoice_pdf_return_a_pdf(self):
-    #     """
-    #     Test que le téléchargement d'une facture en format pdf retourne bien un
-    #     pdf
-    #     """
-    #     # Créé un membre
-    #     username = MemberTestsUtils.get_random_username()
-    #     member = Member(first_name='A', last_name='A',
-    #                     username=username)
-    #     member.set_password('1234')
-    #     member.save()
-
-    #     # Créé une facture
-    #     invoice = Invoice(member=member)
-    #     invoice.save()
-    #     invoice.validate()
-
-    #     # Se connect en tant que le membre
-    #     client = Client()
-    #     client.login(username=username, password='1234')
-    #     # Tente de télécharger la facture
-    #     response = client.get('/billing/invoice/%i/pdf' % invoice.id)
-    #     # Vérifie return code 200 et contient chaine %PDF-1.
-    #     self.assertContains(response, '%PDF-1.', status_code=200, html=False)
-    #     member.delete()
+    def test_download_invoice_pdf_return_a_pdf(self):
+        """
+        Test que le téléchargement d'une facture en format pdf retourne bien un
+        pdf
+        """
+        # Créé un membre
+        username = MemberTestsUtils.get_random_username()
+        member = Member(first_name='A', last_name='A',
+                        username=username)
+        member.set_password('1234')
+        member.save()
+
+        # Créé une facture
+        invoice = Invoice(member=member)
+        invoice.save()
+        invoice.validate()
+
+        # Se connect en tant que le membre
+        client = Client()
+        client.login(username=username, password='1234')
+        # Tente de télécharger la facture
+        response = client.get('/billing/invoice/%i/pdf' % invoice.id)
+        # Vérifie return code 200 et contient chaine %PDF-1.
+        self.assertContains(response, b'%PDF-1.', status_code=200, html=False)
+        member.delete()
 
     def test_that_only_owner_of_invoice_can_access_it(self):
         """