Add GraphQL ability for qa resources

Adds ability to create qa resources with graphql.
Updates iteration resource.

qa/qa/ee/resource/group_iteration.rb

@@ -42,6 +42,38 @@ module QA
             new.click_create_iteration_button
           end
         end
+
+        def api_get_path
+          "gid://gitlab/Iteration/#{id}"
+        end
+
+        def api_post_path
+          "/graphql"
+        end
+
+        def api_post_body
+          <<~GQL
+            mutation {
+              createIteration(input: {
+                groupPath: "#{group.full_path}"
+                title: "#{@title}"
+                description: "#{@description}"
+                startDate: "#{@start_date}"
+                dueDate: "#{@due_date}"
+                }) {
+                iteration {
+                  id
+                  title
+                  description
+                  startDate
+                  dueDate
+                  webUrl
+                }
+                errors
+              }
+            }
+          GQL
+        end
       end
     end
   end

qa/qa/resource/api_fabricator.rb

@@ -96,15 +96,38 @@ module QA
       end
 
       def api_post
-        response = post(
-          Runtime::API::Request.new(api_client, api_post_path).url,
-          api_post_body)
+        if api_post_path == "/graphql"
+          graphql_response = post(
+            Runtime::API::Request.new(api_client, api_post_path).url,
+            query: api_post_body)
 
-        unless response.code == HTTP_STATUS_CREATED
-          raise ResourceFabricationFailedError, "Fabrication of #{self.class.name} using the API failed (#{response.code}) with `#{response}`."
+          flattened_response = flatten_hash(parse_body(graphql_response))
+
+          unless graphql_response.code == HTTP_STATUS_OK && flattened_response[:errors].empty?
+            raise ResourceFabricationFailedError, "Fabrication of #{self.class.name} using the API failed (#{graphql_response.code}) with `#{graphql_response}`."
+          end
+
+          flattened_response[:web_url] = flattened_response.delete(:webUrl)
+          flattened_response[:id] = flattened_response.fetch(:id).split('/')[-1]
+
+          process_api_response(flattened_response)
+        else
+          response = post(
+            Runtime::API::Request.new(api_client, api_post_path).url,
+            api_post_body)
+
+          unless response.code == HTTP_STATUS_CREATED
+            raise ResourceFabricationFailedError, "Fabrication of #{self.class.name} using the API failed (#{response.code}) with `#{response}`."
+          end
+
+          process_api_response(parse_body(response))
         end
+      end
 
-        process_api_response(parse_body(response))
+      def flatten_hash(param)
+        param.each_pair.reduce({}) do |a, (k, v)|
+          v.is_a?(Hash) ? a.merge(flatten_hash(v)) : a.merge(k.to_sym => v)
+        end
       end
 
       def api_delete

qa/qa/runtime/api/request.rb

@@ -34,7 +34,11 @@ module QA
         #
         # Returns the relative path to the requested API resource
         def request_path(path, version: API_VERSION, **query_string)
-          full_path = ::File.join('/api', version, path)
+          full_path = if path == '/graphql'
+                        ::File.join('/api', path)
+                      else
+                        ::File.join('/api', version, path)
+                      end
 
           if query_string.any?
             full_path << (path.include?('?') ? '&' : '?')

qa/qa/specs/features/ee/browser_ui/2_plan/iterations/assign_group_iteration_spec.rb

@@ -3,9 +3,11 @@
 module QA
   RSpec.describe 'Plan' do
     describe 'Assign Iterations' do
+      let!(:iteration) { EE::Resource::GroupIteration.fabricate_via_api! }
+
       let(:project) do
         Resource::Project.fabricate_via_api! do |project|
-          project.group = @iteration.group
+          project.group = iteration.group
           project.name = "project-to-test-iterations-#{SecureRandom.hex(8)}"
         end
       end
@@ -22,14 +24,12 @@ module QA
       end
 
       it 'assigns a group iteration to an existing issue', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/958' do
-        @iteration = EE::Resource::GroupIteration.fabricate_via_browser_ui!
-
         issue.visit!
 
         Page::Project::Issue::Show.perform do |issue|
-          issue.assign_iteration(@iteration)
+          issue.assign_iteration(iteration)
 
-          expect(issue).to have_iteration(@iteration.title)
+          expect(issue).to have_iteration(iteration.title)
         end
       end
     end