Add image attachment lightbox

core/tests.py

@@ -236,6 +236,16 @@ class AttachmentEditTests(TestCase):
         self.assertContains(response, f'{reverse("item_editor", args=[item.id])}?next=/')
         self.assertNotContains(response, reverse('item_card', args=[item.id]))
 
+    def test_unembedded_attachment_images_open_in_lightbox(self):
+        item = Item.objects.create(owner=self.user, content='Original')
+        Attachment.objects.create(item=item, file=SimpleUploadedFile('photo.jpg', b'image', content_type='image/jpeg'))
+
+        response = self.client.get(item.get_absolute_url())
+
+        self.assertContains(response, 'id="image-lightbox"')
+        self.assertContains(response, 'class="btn p-0 border-0 bg-transparent attachment-image-preview"')
+        self.assertContains(response, 'data-image-url=')
+
 
 class TeamItemEditTests(TestCase):
     def setUp(self):