Add regression test

Author: ArtOfCode-

test/controllers/categories_controller_test.rb

@@ -9,6 +9,22 @@ class CategoriesControllerTest < ActionController::TestCase
     assert_not_nil assigns(:categories)
   end
 
+  test 'homepage should show categories in the correct order' do
+    get :homepage
+    assert_not_nil assigns(:header_categories)
+    seq = 0
+    id = 0
+    assigns(:header_categories).each do |category|
+      if category.sequence.nil?
+        assert category.id > id, "Category #{category.id} not after #{id}"
+      else
+        assert category.sequence >= seq, "Category #{category.id} sequence #{category.sequence} not greater than #{seq}"
+      end
+      seq = category.sequence || seq
+      id = category.id
+    end
+  end
+
   test ':homepage should correctly show the homepage category' do
     get :homepage
     assert_response(:success)

test/fixtures/categories.yml

@@ -7,6 +7,7 @@ main:
     - <%= Article.post_type_id %>
   tag_set: main
   license: cc_by_sa
+  sequence: 1
 
 meta:
   community: sample
@@ -16,6 +17,7 @@ meta:
     - <%= Question.post_type_id %>
   tag_set: meta
   license: cc_by_sa
+  sequence: 2
 
 high_trust:
   community: sample
@@ -26,6 +28,7 @@ high_trust:
   tag_set: main
   min_trust_level: 3
   license: cc_by_sa
+  sequence: 3
 
 admin_only:
   community: sample
@@ -37,6 +40,7 @@ admin_only:
   min_trust_level: 5
   min_view_trust_level: 5
   license: cc_by_sa
+  sequence: 99
 
 articles_only:
   community: sample