modify test to check that the result is superset of the reference

tests/test_nodes.py

@@ -33,7 +33,8 @@ def test_get_download_formats(client):
     response = client.get('/nodes/download_formats')
 
     assert response.status_code == 200
-    assert response.json() == {
+
+    ref = {
         'data.core.array.ArrayData.|': ['json'],
         'data.core.array.bands.BandsData.|': [
             'agr',
@@ -56,6 +57,16 @@ def test_get_download_formats(client):
         'data.core.upf.UpfData.|': ['json', 'upf'],
     }
 
+    def is_ref_covered(res):
+        for key, val in ref.items():
+            if key not in res:
+                return False
+            if not set(val) <= set(res[key]):
+                return False
+        return True
+
+    assert is_ref_covered(response.json()), response.json()
+
 
 def test_get_single_nodes(default_nodes, client):  # pylint: disable=unused-argument
     """Test retrieving a single nodes."""