Edit paper page should save changes to the author list

[swt2public]

Scenario

Given a paper with one author
And another author called 'Peter Plagiarist'
When a user visits the paper's edit page
And the selects 'Peter Plagiarist' as first author
And submits the form
Then 'Peter Plagiarist' should be author of the paper

Hints

Make sure that you have "permitted" the parameters for passing the author ids to the paper controller (function paper_params) using :author_ids => [].

Error

Expected #<activerecord::associations::collectionproxy [#<author id: 1, first_name: "alan", last_name: "turing.../wikipedia.org/alan_turing", created_at: "2017-11-07 14:05:16", updated_at: "2017-11-07 14:05:16">]> to include #<author id: 2, first_name: "peter", last_name: "plagiarist", homepage: "http://wikipedia.de/alan_turing", created_at: "2017-11-07 14:05:16", updated_at: "2017-11-07 14:05:16">
diff:
@@ -1,2 +1,8 @@
-[#<author id: 2, first_name: "peter", last_name: "plagiarist", homepage: "http://wikipedia.de/alan_turing", created_at: "2017-11-07 14:05:16", updated_at: "2017-11-07 14:05:16">]
+[#<author:0x00000006c2fe10

• id: 1,
• first_name: "alan",
• last_name: "turing",
• homepage: "http://wikipedia.org/alan_turing",
• created_at: tue, 07 nov 2017 14:05:16 utc +00:00,
• updated_at: tue, 07 nov 2017 14:05:16 utc +00:00>]

Estimated progress: 94% complete