special-gallery: scope image prev/next/back to special galleries; add tests

viewer/test_specials.py

@@ -91,6 +91,41 @@ class SpecialGalleriesTests(TestCase):
         # Next should be c.jpg (since favorites are a.jpg and c.jpg sorted)
         self.assertIn("c.jpg", ctx.get("next"))
 
+    def test_favorites_image_view_prev_next_urls_and_back_link(self):
+        # Image view under favorites should produce prev/next URLs scoped to favorites
+        resp = self.client.get("/gallery/favorites/a.jpg/")
+        self.assertEqual(resp.status_code, 200)
+        ctx = resp.context
+        self.assertTrue(ctx.get("is_special"))
+
+        crumbs = ctx.get("breadcrumbs")
+        # back link for template should point to the special root
+        self.assertTrue(crumbs[0]["path"].startswith("/gallery/favorites/"))
+
+        # prev_url should be None for first favorite; next_url should be inside favorites
+        self.assertIsNone(ctx.get("prev_url"))
+        next_url = ctx.get("next_url")
+        self.assertIsNotNone(next_url)
+        self.assertTrue(next_url.startswith("/gallery/favorites/"))
+        self.assertIn("c.jpg", next_url)
+
+    def test_most_visited_image_view_prev_next_urls(self):
+        # most-visited image view should scope prev/next URLs to the most-visited gallery
+        resp = self.client.get("/gallery/most-visited/b.jpg/")
+        self.assertEqual(resp.status_code, 200)
+        ctx = resp.context
+        self.assertTrue(ctx.get("is_special"))
+
+        crumbs = ctx.get("breadcrumbs")
+        self.assertTrue(crumbs[0]["path"].startswith("/gallery/most-visited/"))
+
+        # b.jpg is the top most-visited image in fixtures => prev_url None, next_url points to a.jpg
+        self.assertIsNone(ctx.get("prev_url"))
+        next_url = ctx.get("next_url")
+        self.assertIsNotNone(next_url)
+        self.assertTrue(next_url.startswith("/gallery/most-visited/"))
+        self.assertIn("a.jpg", next_url)
+
     def test_most_visited_and_recent_directory_views(self):
         # most-visited should list images ordered by visits desc
         resp = self.client.get("/gallery/most-visited/")