Allow users to add cluster with ancestors

Include a new policy in Clusterables
(projects and groups), which checks if another cluster
can be added

clusterable_has_cluster? and multiple_clusters_available
private methods will be overriden in EE

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/34758

1 files changed, 11 insertions, 1 deletions

diff --git a/spec/policies/project_policy_spec.rb b/spec/policies/project_policy_spec.rb
index 69468f9ad85..fa47b95899a 100644
--- a/spec/policies/project_policy_spec.rb
+++ b/spec/policies/project_policy_spec.rb
@@ -48,7 +48,7 @@ describe ProjectPolicy do
       update_deployment admin_project_snippet
       admin_project_member admin_note admin_wiki admin_project
       admin_commit_status admin_build admin_container_image
-      admin_pipeline admin_environment admin_deployment
+      admin_pipeline admin_environment admin_deployment add_cluster
     ]
   end
 
@@ -465,4 +465,14 @@ describe ProjectPolicy do
       expect_disallowed(*maintainer_abilities)
     end
   end
+
+  it_behaves_like 'clusterable policies' do
+    let(:clusterable) { create(:project, :repository) }
+    let(:cluster) do
+      create(:cluster,
+             :provided_by_gcp,
+             :project,
+             projects: [clusterable])
+    end
+  end
 end