Allow wiki page attributes to be passed separately

spec/factories/wiki_pages.rb

@@ -5,17 +5,22 @@ require 'ostruct'
 FactoryBot.define do
   factory :wiki_page do
     transient do
+      title { generate(:wiki_page_title) }
+      content { 'Content for wiki page' }
+      format { 'markdown' }
+      project { create(:project) }
       attrs do
         {
-          title: 'Title.with.dot',
-          content: 'Content for wiki page',
-          format: 'markdown'
+          title: title,
+          content: content,
+          format: format
         }
       end
     end
 
     page { OpenStruct.new(url_path: 'some-name') }
-    association :wiki, factory: :project_wiki, strategy: :build
+    wiki { build(:project_wiki, project: project) }
+
     initialize_with { new(wiki, page) }
 
     before(:create) do |page, evaluator|
@@ -26,4 +31,30 @@ FactoryBot.define do
       page.create
     end
   end
+
+  factory :wiki_page_meta, class: 'WikiPage::Meta' do
+    title { generate(:wiki_page_title) }
+    project { create(:project) }
+
+    trait :for_wiki_page do
+      transient do
+        wiki_page { create(:wiki_page, project: project) }
+      end
+
+      initialize_with { wiki_page.meta }
+    end
+  end
+
+  factory :wiki_page_slug, class: 'WikiPage::Slug' do
+    wiki_page_meta { create(:wiki_page_meta) }
+    slug { generate(:sluggified_title) }
+    canonical { false }
+
+    trait :canonical do
+      canonical { true }
+    end
+  end
+
+  sequence(:wiki_page_title) { |n| "Page #{n}" }
+  sequence(:sluggified_title) { |n| "slug-#{n}" }
 end