add a test for including many objects from a related serializer

Author: tbartelmess

example/serializers.py

@@ -35,6 +35,7 @@ def __init__(self, *args, **kwargs):
         'authors': 'example.serializers.AuthorSerializer',
         'comments': 'example.serializers.CommentSerializer',
         'featured': 'example.serializers.EntrySerializer',
+        'suggested': 'example.serializers.EntrySerializer',
     }
 
     body_format = serializers.SerializerMethodField()

example/tests/integration/test_includes.py

@@ -38,6 +38,15 @@ def test_dynamic_related_data_is_included(single_entry, entry_factory, client):
     assert len(included) == 1, 'The dynamically included blog entries are of an incorrect count'
 
 
+def test_dynamic_many_related_data_is_included(single_entry, entry_factory, client):
+    entry_factory()
+    response = client.get(reverse("entry-detail", kwargs={'pk': single_entry.pk}) + '?include=suggested')
+    included = load_json(response.content).get('included')
+
+    assert included
+    assert [x.get('type') for x in included] == ['entries'], 'Dynamic included types are incorrect'
+
+
 def test_missing_field_not_included(author_bio_factory, author_factory, client):
     # First author does not have a bio
     author = author_factory(bio=None)