billscroll should now remember user's position across devices

src/apps/billboard/tests/integrated/test_billboard_views.py

@@ -2,7 +2,7 @@ from django.test import TestCase
 from django.urls import reverse
 
 from apps.applets.models import Applet
-from apps.drama.models import GameEvent, record
+from apps.drama.models import GameEvent, ScrollPosition, record
 from apps.epic.models import Room
 from apps.lyric.models import User
 
@@ -133,3 +133,52 @@ class BillscrollViewTest(TestCase):
     def test_passes_page_class_billscroll(self):
         response = self.client.get(f"/billboard/room/{self.room.id}/scroll/")
         self.assertEqual(response.context["page_class"], "page-billscroll")
+
+    def test_passes_scroll_position_zero_when_none_saved(self):
+        response = self.client.get(f"/billboard/room/{self.room.id}/scroll/")
+        self.assertEqual(response.context["scroll_position"], 0)
+
+    def test_passes_saved_scroll_position_in_context(self):
+        ScrollPosition.objects.create(user=self.user, room=self.room, position=250)
+        response = self.client.get(f"/billboard/room/{self.room.id}/scroll/")
+        self.assertEqual(response.context["scroll_position"], 250)
+
+
+class SaveScrollPositionTest(TestCase):
+    def setUp(self):
+        self.user = User.objects.create(email="test@savescroll.io")
+        self.client.force_login(self.user)
+        self.room = Room.objects.create(name="Test Room", owner=self.user)
+
+    def test_post_saves_scroll_position(self):
+        self.client.post(
+            f"/billboard/room/{self.room.id}/scroll-position/",
+            {"position": 300},
+        )
+        sp = ScrollPosition.objects.get(user=self.user, room=self.room)
+        self.assertEqual(sp.position, 300)
+
+    def test_post_updates_existing_position(self):
+        ScrollPosition.objects.create(user=self.user, room=self.room, position=100)
+        self.client.post(
+            f"/billboard/room/{self.room.id}/scroll-position/",
+            {"position": 450},
+        )
+        self.assertEqual(
+            ScrollPosition.objects.get(user=self.user, room=self.room).position, 450
+        )
+
+    def test_post_returns_204(self):
+        response = self.client.post(
+            f"/billboard/room/{self.room.id}/scroll-position/",
+            {"position": 100},
+        )
+        self.assertEqual(response.status_code, 204)
+
+    def test_post_requires_login(self):
+        self.client.logout()
+        response = self.client.post(
+            f"/billboard/room/{self.room.id}/scroll-position/",
+            {"position": 100},
+        )
+        self.assertEqual(response.status_code, 302)