Improve SQL test script

src/test/sql/fixtures/4-fixture_article.sql

@@ -0,0 +1,27 @@
+create or replace function fixture_article(in name text default 'love', _citizen_id uuid default fixture_citizen(), _version_id uuid default uuid_generate_v4(), out _article_id uuid)
+    language plpgsql as
+$$
+declare
+    created_article  json := $json$
+    {
+      "title": "Love the world",
+      "anonymous": false,
+      "content": "bla bal bla",
+      "tags": [
+        "love",
+        "test"
+      ],
+      "draft":false
+    }
+    $json$;
+begin
+    if (name = 'love') then
+        -- set citizen id to article
+        created_article := jsonb_set(created_article::jsonb, '{created_by}'::text[], jsonb_build_object('id', _citizen_id::text), true)::json;
+        created_article := jsonb_set(created_article::jsonb, '{version_id}'::text[], to_jsonb(_version_id), true)::json;
+        assert created_article#>>'{created_by, id}' = _citizen_id::text, format('citizenId in article must be the same as citizen, %s != %s', created_article#>>'{created_by, id}', _citizen_id::text);
+        -- upsert article
+        select (a->>'id')::uuid into _article_id from upsert_article(created_article) a;
+    end if;
+end;
+$$;