GraphQL IssueType returns work item path if task

Issue type has a webUrl and webPath fields.
These fields will now return the work items url
if the presented issue is of type task

app/presenters/issue_presenter.rb

@@ -4,7 +4,9 @@ class IssuePresenter < Gitlab::View::Presenter::Delegated
   presents ::Issue, as: :issue
 
   def issue_path
-    url_builder.build(issue, only_path: true)
+    return url_builder.build(issue, only_path: true) unless use_work_items_path?
+
+    project_work_items_path(issue.project, work_items_path: issue.id)
   end
 
   delegator_override :subscribed?
@@ -15,6 +17,18 @@ class IssuePresenter < Gitlab::View::Presenter::Delegated
   def project_emails_disabled?
     issue.project.emails_disabled?
   end
+
+  def web_url
+    return super unless use_work_items_path?
+
+    project_work_items_url(issue.project, work_items_path: issue.id)
+  end
+
+  private
+
+  def use_work_items_path?
+    issue.issue_type == 'task' && issue.project.work_items_feature_flag_enabled?
+  end
 end
 
 IssuePresenter.prepend_mod_with('IssuePresenter')

ee/app/presenters/ee/issue_presenter.rb

@@ -3,6 +3,7 @@
 module EE
   module IssuePresenter
     extend ActiveSupport::Concern
+    extend ::Gitlab::Utils::Override
 
     def sla_due_at
       return unless sla_available?
@@ -10,6 +11,7 @@ module EE
       issuable_sla&.due_at
     end
 
+    override :web_url
     def web_url
       return super unless issue.issue_type == 'test_case'
 

spec/factories/issues.rb

@@ -58,6 +58,11 @@ FactoryBot.define do
       end
     end
 
+    trait :task do
+      issue_type { :task }
+      association :work_item_type, :default, :task
+    end
+
     factory :incident do
       issue_type { :incident }
       association :work_item_type, :default, :incident

spec/factories/work_items/work_item_types.rb

@@ -37,5 +37,10 @@ FactoryBot.define do
       base_type { WorkItems::Type.base_types[:requirement] }
       icon_name { 'issue-type-requirements' }
     end
+
+    trait :task do
+      base_type { WorkItems::Type.base_types[:task] }
+      icon_name { 'issue-type-task' }
+    end
   end
 end

spec/presenters/issue_presenter_spec.rb

@@ -5,19 +5,42 @@ require 'spec_helper'
 RSpec.describe IssuePresenter do
   include Gitlab::Routing.url_helpers
 
-  let(:user)      { create(:user) }
-  let(:group)     { create(:group) }
-  let(:project)   { create(:project, group: group) }
-  let(:issue)     { create(:issue, project: project) }
-  let(:presenter) { described_class.new(issue, current_user: user) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, group: group) }
+  let_it_be(:issue) { create(:issue, project: project) }
+  let_it_be(:task) { create(:issue, :task, project: project) }
 
-  before do
+  let(:presented_issue) { issue }
+  let(:presenter) { described_class.new(presented_issue, current_user: user) }
+
+  before_all do
     group.add_developer(user)
   end
 
   describe '#web_url' do
     it 'returns correct path' do
-      expect(presenter.web_url).to eq("http://localhost/#{group.name}/#{project.name}/-/issues/#{issue.iid}")
+      expect(presenter.web_url).to eq("http://localhost/#{group.name}/#{project.name}/-/issues/#{presented_issue.iid}")
+    end
+
+    context 'when issue type is task' do
+      let(:presented_issue) { task }
+
+      context 'when work_items feature flag is enabled' do
+        it 'returns a work item url for the task' do
+          expect(presenter.web_url).to eq(project_work_items_url(project, work_items_path: presented_issue.id))
+        end
+      end
+
+      context 'when work_items feature flag is disabled' do
+        before do
+          stub_feature_flags(work_items: false)
+        end
+
+        it 'returns an issue url for the task' do
+          expect(presenter.web_url).to eq("http://localhost/#{group.name}/#{project.name}/-/issues/#{presented_issue.iid}")
+        end
+      end
     end
   end
 
@@ -29,7 +52,7 @@ RSpec.describe IssuePresenter do
     end
 
     it 'returns subscribed' do
-      create(:subscription, user: user, project: project, subscribable: issue, subscribed: true)
+      create(:subscription, user: user, project: project, subscribable: presented_issue, subscribed: true)
 
       is_expected.to be(true)
     end
@@ -37,7 +60,27 @@ RSpec.describe IssuePresenter do
 
   describe '#issue_path' do
     it 'returns correct path' do
-      expect(presenter.issue_path).to eq("/#{group.name}/#{project.name}/-/issues/#{issue.iid}")
+      expect(presenter.issue_path).to eq("/#{group.name}/#{project.name}/-/issues/#{presented_issue.iid}")
+    end
+
+    context 'when issue type is task' do
+      let(:presented_issue) { task }
+
+      context 'when work_items feature flag is enabled' do
+        it 'returns a work item path for the task' do
+          expect(presenter.issue_path).to eq(project_work_items_path(project, work_items_path: presented_issue.id))
+        end
+      end
+
+      context 'when work_items feature flag is disabled' do
+        before do
+          stub_feature_flags(work_items: false)
+        end
+
+        it 'returns an issue path for the task' do
+          expect(presenter.issue_path).to eq("/#{group.name}/#{project.name}/-/issues/#{presented_issue.iid}")
+        end
+      end
     end
   end