Add test for issue weight

qa/qa/specs/features/ee/browser_ui/2_plan/issues/issues_weights_spec.rb

+# frozen_string_literal: true
+
+module QA
+  context 'Plan' do
+    describe 'Issues weights' do
+      before do
+        Runtime::Browser.visit(:gitlab, Page::Main::Login)
+        Page::Main::Login.perform(&:sign_in_using_credentials)
+      end
+
+      let(:project) do
+        QA::Resource::Project.fabricate_via_api! do |project|
+          project.name = 'the-lord-of-the-rings'
+        end
+      end
+
+      let(:milestone) do
+        QA::EE::Resource::ProjectMilestone.fabricate_via_api! do |m|
+          m.project = project
+          m.title = 'the-fellowship-of-the-ring'
+        end
+      end
+
+      let(:weight) { 1000 }
+
+      let(:issue) do
+        Resource::Issue.fabricate_via_api! do |issue|
+          issue.milestone = milestone
+          issue.project = project
+          issue.title = 'keep-the-ring-safe'
+          issue.weight = weight
+        end
+      end
+
+      it 'shows the set weight in the issue page, in the milestone page, and in the issues list page' do
+        issue.visit!
+
+        Page::Project::Issue::Show.perform do |show|
+          expect(show.weight_label_value).to have_content(weight)
+
+          show.click_milestone_link
+        end
+
+        Page::Project::Milestone::Index.perform do |index|
+          expect(index.total_issue_weight_value).to have_content(weight)
+        end
+
+        Page::Project::Menu.perform(&:click_issues)
+
+        Page::Project::Issue::Index.perform do |index|
+          expect(index.issuable_weight).to have_content(weight)
+        end
+      end
+    end
+  end
+end