Rearrange DeploymentPlatform methods

- Change find_cluster_platform_kubernetes to ignore environment argument
- Fix broken specs

CE Port of: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5047/

app/models/clusters/cluster.rb

@@ -10,6 +10,7 @@ module Clusters
       Applications::Prometheus.application_name => Applications::Prometheus,
       Applications::Runner.application_name => Applications::Runner
     }.freeze
+    DEFAULT_ENVIRONMENT = '*'.freeze
     belongs_to :user
@@ -50,6 +51,7 @@ module Clusters
     scope :enabled, -> { where(enabled: true) }
     scope :disabled, -> { where(enabled: false) }
+    scope :default_environment, -> { where(environment_scope: DEFAULT_ENVIRONMENT) }
     def status_name
       if provider

app/models/concerns/deployment_platform.rb

 module DeploymentPlatform
-  # EE would override this and utilize the extra argument
+  # EE would override this and utilize environment argument
   def deployment_platform(environment: nil)
     @deployment_platform ||=
-      find_cluster_platform_kubernetes ||
+      find_cluster_platform_kubernetes(environment: environment) ||
       find_kubernetes_service_integration ||
       build_cluster_and_deployment_platform
   end
   private
-  def find_cluster_platform_kubernetes
-    clusters.find_by(enabled: true)&.platform_kubernetes
+  # EE would override this and utilize environment argument
+  def find_cluster_platform_kubernetes(environment: nil)
+    clusters.enabled.default_environment
+      .last&.platform_kubernetes
   end
   def find_kubernetes_service_integration

spec/controllers/projects/clusters_controller_spec.rb

@@ -18,7 +18,7 @@ describe Projects::ClustersController do
       context 'when project has one or more clusters' do
         let(:project) { create(:project) }
         let!(:enabled_cluster) { create(:cluster, :provided_by_gcp, projects: [project]) }
-        let!(:disabled_cluster) { create(:cluster, :disabled, :provided_by_gcp, projects: [project]) }
+        let!(:disabled_cluster) { create(:cluster, :disabled, :provided_by_gcp, :production_environment, projects: [project]) }
         it 'lists available clusters' do
           go
@@ -32,7 +32,7 @@ describe Projects::ClustersController do
           before do
             allow(Clusters::Cluster).to receive(:paginates_per).and_return(1)
-            create_list(:cluster, 2, :provided_by_gcp, projects: [project])
+            create_list(:cluster, 2, :provided_by_gcp, :production_environment, projects: [project])
             get :index, namespace_id: project.namespace, project_id: project, page: last_page
           end

spec/factories/clusters/clusters.rb

@@ -32,5 +32,9 @@ FactoryBot.define do
     trait :disabled do
       enabled false
     end
+
+    trait :production_environment do
+      sequence(:environment_scope) { |n| "production#{n}/*" }
+    end
   end
 end

spec/finders/clusters_finder_spec.rb

@@ -6,7 +6,7 @@ describe ClustersFinder do
   describe '#execute' do
     let(:enabled_cluster) { create(:cluster, :provided_by_gcp, projects: [project]) }
-    let(:disabled_cluster) { create(:cluster, :disabled, :provided_by_gcp, projects: [project]) }
+    let(:disabled_cluster) { create(:cluster, :disabled, :provided_by_gcp, :production_environment, projects: [project]) }
     subject { described_class.new(project, user, scope).execute }

spec/presenters/project_presenter_spec.rb

@@ -339,7 +339,7 @@ describe ProjectPresenter do
         it 'returns link to clusters page if more than one exists' do
           project.add_master(user)
-          create(:cluster, projects: [project])
+          create(:cluster, :production_environment, projects: [project])
           create(:cluster, projects: [project])
           expect(presenter.kubernetes_cluster_anchor_data).to eq(OpenStruct.new(enabled: true,

spec/services/clusters/create_service_spec.rb

@@ -82,7 +82,7 @@ describe Clusters::CreateService do
     context 'when project has a cluster' do
       include_context 'valid params'
-      let!(:cluster) { create(:cluster, :provided_by_gcp, projects: [project]) }
+      let!(:cluster) { create(:cluster, :provided_by_gcp, :production_environment, projects: [project]) }
       it 'does not create a cluster' do
         expect(ClusterProvisionWorker).not_to receive(:perform_async)