Add nuget package upload via CI test

qa/qa/specs/features/browser_ui/5_package/nuget_repository_spec.rb

+# frozen_string_literal: true
+
+module QA
+  RSpec.describe 'Package', :orchestrated, :packages do
+    describe 'NuGet Repository' do
+      include Runtime::Fixtures
+
+      let(:package_name) { 'dotnetcore' }
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
+          project.name = 'nuget-package-project'
+          project.template_name = 'dotnetcore'
+        end
+      end
+
+      let!(:runner) do
+        Resource::Runner.fabricate! do |runner|
+          runner.name = "qa-runner-#{Time.now.to_i}"
+          runner.tags = ["runner-for-#{project.name}"]
+          runner.executor = :docker
+          runner.project = project
+        end
+      end
+
+      after do
+        runner.remove_via_api!
+      end
+
+      it 'publishes a nuget package and deletes it', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1073' do
+        Flow::Login.sign_in
+
+        Resource::Repository::Commit.fabricate_via_api! do |commit|
+          commit.project = project
+          commit.commit_message = 'Add .gitlab-ci.yml'
+          commit.update_files(
+            [
+                {
+                    file_path: '.gitlab-ci.yml',
+                    content: <<~YAML
+                    image: mcr.microsoft.com/dotnet/core/sdk:3.1
+
+                    stages:
+                      - deploy
+
+                    deploy:
+                      stage: deploy
+                      script:
+                        - dotnet restore -p:Configuration=Release
+                        - dotnet build -c Release
+                        - dotnet pack -c Release
+                        - dotnet nuget add source "$CI_SERVER_URL/api/v4/projects/$CI_PROJECT_ID/packages/nuget/index.json" --name gitlab --username gitlab-ci-token --password $CI_JOB_TOKEN --store-password-in-clear-text
+                        - dotnet nuget push "bin/Release/*.nupkg" --source gitlab
+                      only:
+                        - master
+                      tags:
+                        - "runner-for-#{project.name}"
+                    YAML
+                }
+            ]
+          )
+        end
+
+        project.visit!
+        Page::Project::Menu.perform(&:click_ci_cd_pipelines)
+        Page::Project::Pipeline::Index.perform(&:click_on_latest_pipeline)
+
+        Page::Project::Pipeline::Show.perform do |pipeline|
+          pipeline.click_job('deploy')
+        end
+
+        Page::Project::Job::Show.perform do |job|
+          expect(job).to be_successful(timeout: 800)
+        end
+
+        Page::Project::Menu.perform(&:click_packages_link)
+
+        Page::Project::Packages::Index.perform do |index|
+          expect(index).to have_package(package_name)
+          index.click_package(package_name)
+        end
+
+        Page::Project::Packages::Show.perform do |package|
+          package.click_delete
+        end
+
+        Page::Project::Packages::Index.perform do |index|
+          expect(index).to have_content("Package deleted successfully")
+          expect(index).to have_no_package(package_name)
+        end
+      end
+    end
+  end
+end