fix test after making top_level_links class variable

Author: syphax-bouazzouni

Gemfile.lock

@@ -57,8 +57,8 @@ GEM
     pry (0.15.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (6.0.1)
-    rack (3.1.8)
+    public_suffix (5.1.1)
+    rack (3.1.9)
     rake (13.2.1)
     request_store (1.7.0)
       rack (>= 1.4)

lib/ontologies_api_client/collection.rb

@@ -37,7 +37,7 @@ def top_level_links(link = LinkedData::Client.settings.rest_url)
         # Return a link given an object (with links) and a media type
         def uri_from_context(object, media_type)
           object.links.each do |type, link|
-            return link if link.media_type && link.media_type.downcase.eql?(media_type.downcase)
+            return link.dup if link.media_type && link.media_type.downcase.eql?(media_type.downcase)
           end
         end