More robust tests for the propositions list view

Creating some data to populate the page revealed some bug in the
template while refactoring the Reponses/Answer model in the previous
commit.

propositions/tests.py

@@ -3,7 +3,7 @@ from django.test import Client, TestCase
 from django.urls import reverse_lazy, reverse
 
 from gestion.models import ErnestoUser
-from propositions.models import Prop
+from propositions.models import Answer, Prop
 
 User = get_user_model()
 
@@ -51,14 +51,22 @@ class PropositionCreateTest(TestCase):
 class PropositionListTest(TestCase):
     url = reverse_lazy("propositions:list")
 
+    def setUp(self):
+        self.user = new_user("toto")
+        for name in ["foo", "bar", "baz"]:
+            p = Prop.objects.create(nom=name, user=self.user.profile)
+            Answer.objects.create(proposition=p, user=self.user, answer=Answer.YES)
+        for name in ["oof", "rab", "zab"]:
+            p = Prop.objects.create(nom=name, user=self.user.profile)
+            Answer.objects.create(proposition=p, user=self.user, answer=Answer.NO)
+
     def test_anonymous_get(self):
         response = Client().get(self.url)
         self.assertRedirects(response, "/login?next={}".format(self.url))
 
     def test_get(self):
-        user = new_user("toto")
         client = Client()
-        client.force_login(user)
+        client.force_login(self.user)
 
         response = client.get(self.url)
         self.assertEqual(response.status_code, 200)