Change test assertions

With the new assertions we benefit from:
- Running the test faster
- Testing the real functionality instead of only asserting on
messages

doc/development/testing_guide/end_to_end/quick_start_guide.md

@@ -242,7 +242,7 @@ module QA
 
         issue = Resource::Issue.fabricate_via_api! do |issue|
           issue.title = 'Issue to test the scoped labels'
-          issue.labels = @initial_label
+          issue.labels = [@initial_label]
         end
 
         [@new_label_same_scope, @new_label_different_scope].each do |label|
@@ -365,6 +365,14 @@ Add the following `attribute :id` and `attribute :labels` right above the [`attr
 
 > We add the attributes above the existing attribute to keep them alphabetically organized.
 
+Then, let's initialize an instance variable for labels to allow an empty array as default value when such information is not passed during the resource fabricatioin, since this optional. [Between the attributes and the `fabricate!` method](https://gitlab.com/gitlab-org/gitlab-ee/blob/1a1f1408728f19b2aa15887cd20bddab7e70c8bd/qa/qa/resource/issue.rb#L18), add the following:
+
+```ruby
+def initialize
+  @labels = []
+end
+```
+
 Next, add the following code right below the [`fabricate!`](https://gitlab.com/gitlab-org/gitlab-ee/blob/d3584e80b4236acdf393d815d604801573af72cc/qa/qa/resource/issue.rb#L27) method.
 
 ```ruby
@@ -378,7 +386,7 @@ end
 
 def api_post_body
   {
-    labels: [labels],
+    labels: labels,
     title: title
   }
 end

ee/app/assets/javascripts/related_issues/components/related_issues_block.vue

@@ -258,6 +258,7 @@ export default {
               :can-reorder="canReorder"
               :path-id-separator="pathIdSeparator"
               event-namespace="relatedIssue"
+              class="qa-related-issuable-item"
               @relatedIssueRemoveRequest="$emit('relatedIssueRemoveRequest', $event)"
             >
               <span v-if="issue.weight" slot="weight" class="order-md-1">

qa/qa/ee/page/group/epic/show.rb

@@ -25,6 +25,10 @@ module QA
               element :add_issue_input
             end
 
+            view 'ee/app/assets/javascripts/related_issues/components/related_issues_block.vue' do
+              element :related_issuable_item
+            end
+
             view 'ee/app/assets/javascripts/related_issues/constants.js' do
               element :add_issues_button
             end
@@ -58,6 +62,14 @@ module QA
             def close_reopen_epic
               click_element :close_reopen_epic_button
             end
+
+            def has_related_issuable_item?
+              has_element?(:related_issuable_item)
+            end
+
+            def has_no_related_issuable_item?
+              has_no_element?(:related_issuable_item)
+            end
           end
         end
       end

qa/qa/resource/issue.rb

@@ -16,6 +16,10 @@ module QA
       attribute :labels
       attribute :title
 
+      def initialize
+        @labels = []
+      end
+
       def fabricate!
         project.visit!
 
@@ -38,7 +42,7 @@ module QA
 
       def api_post_body
         {
-          labels: [labels],
+          labels: labels,
           title: title
         }
       end

qa/qa/specs/features/browser_ui/2_plan/ee_epic/epics_management_spec.rb

@@ -44,15 +44,15 @@ module QA
           EE::Page::Group::Epic::Show.perform do |show_page|
             show_page.add_issue_to_epic(issue.web_url)
 
-            expect(show_page).to have_content('added issue')
+            expect(show_page).to have_related_issuable_item
 
             show_page.remove_issue_from_epic
 
-            expect(show_page).to have_content('removed issue')
+            expect(show_page).to have_no_related_issuable_item
           end
         end
 
-        it 'comments on epic', :quarantine do
+        it 'comments on epic' do
           epic.visit!
 
           comment = 'My Epic Comment'
@@ -75,7 +75,7 @@ module QA
           expect(page).to have_content('Open')
         end
 
-        it 'adds/removes issue to/from epic using quick actions', :quarantine do
+        it 'adds/removes issue to/from epic using quick actions' do
           issue.visit!
 
           Page::Project::Issue::Show.perform do |show_page|
@@ -97,7 +97,6 @@ module QA
 
         def create_issue_resource
           Resource::Issue.fabricate_via_api! do |issue|
-            issue.labels = ''
             issue.title = 'Issue created via API'
           end
         end

qa/qa/specs/features/browser_ui/2_plan/ee_epic/promote_issue_to_epic_spec.rb

@@ -17,11 +17,13 @@ module QA
           project.group = group
         end
 
-        Resource::Issue.fabricate_via_browser_ui! do |issue|
+        issue = Resource::Issue.fabricate_via_api! do |issue|
           issue.title = issue_title
           issue.project = project
         end
 
+        issue.visit!
+
         Page::Project::Issue::Show.perform do |show|
           # Due to the randomness of tests execution, sometimes a previous test
           # may have changed the filter, which makes the below action needed.

qa/qa/specs/features/browser_ui/2_plan/ee_scoped_labels/editing_scoped_labels_spec.rb

@@ -11,7 +11,7 @@ module QA
 
         issue = Resource::Issue.fabricate_via_api! do |issue|
           issue.title = 'Issue to test the scoped labels'
-          issue.labels = @initial_label
+          issue.labels = [@initial_label]
         end
 
         [@new_label_same_scope, @new_label_different_scope].each do |label|

qa/qa/specs/features/browser_ui/ee_geo/attachment_replication_spec.rb

@@ -26,7 +26,6 @@ module QA
           @issue = Resource::Issue.fabricate! do |issue|
             issue.title = 'My geo issue'
             issue.project = @project
-            issue.labels = ''
           end
 
           @issue.visit!