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, 64 insertions, 0 deletions

diff --git a/spec/presenters/clusterable_presenter_spec.rb b/spec/presenters/clusterable_presenter_spec.rb
index 4f4ae5e07c5..05afe5347d1 100644
--- a/spec/presenters/clusterable_presenter_spec.rb
+++ b/spec/presenters/clusterable_presenter_spec.rb
@@ -14,4 +14,68 @@ describe ClusterablePresenter do
       expect(subject).to be_kind_of(ProjectClusterablePresenter)
     end
   end
+
+  shared_examples 'appropriate member permissions' do
+    context 'with a developer' do
+      before do
+        clusterable.add_developer(user)
+      end
+
+      it { is_expected.to be_falsy }
+    end
+
+    context 'with a maintainer' do
+      before do
+        clusterable.add_maintainer(user)
+      end
+
+      it { is_expected.to be_truthy }
+    end
+  end
+
+  describe '#can_create_cluster?' do
+    let(:user) { create(:user) }
+
+    subject { described_class.new(clusterable).can_create_cluster? }
+
+    before do
+      allow(clusterable).to receive(:current_user).and_return(user)
+    end
+
+    context 'when clusterable is a group' do
+      let(:clusterable) { create(:group) }
+
+      it_behaves_like 'appropriate member permissions'
+    end
+
+    context 'when clusterable is a project' do
+      let(:clusterable) { create(:project, :repository) }
+
+      it_behaves_like 'appropriate member permissions'
+    end
+  end
+
+  describe '#can_add_cluster?' do
+    let(:user) { create(:user) }
+
+    subject { described_class.new(clusterable).can_add_cluster? }
+
+    before do
+      clusterable.add_maintainer(user)
+
+      allow(clusterable).to receive(:current_user).and_return(user)
+    end
+
+    context 'when clusterable is a group' do
+      let(:clusterable) { create(:group) }
+
+      it_behaves_like 'appropriate member permissions'
+    end
+
+    context 'when clusterable is a project' do
+      let(:clusterable) { create(:project, :repository) }
+
+      it_behaves_like 'appropriate member permissions'
+    end
+  end
 end