DELETE clusters/:id/:application endpoint

Add endpoint to delete/uninstall a cluster application

1 files changed, 63 insertions, 0 deletions

diff --git a/spec/services/clusters/applications/destroy_service_spec.rb b/spec/services/clusters/applications/destroy_service_spec.rb
new file mode 100644
index 00000000000..8d9dc6a0f11
--- /dev/null
+++ b/spec/services/clusters/applications/destroy_service_spec.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Clusters::Applications::DestroyService, '#execute' do
+  let(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+  let(:user) { create(:user) }
+  let(:params) { { application: 'prometheus' } }
+  let(:service) { described_class.new(cluster, user, params) }
+  let(:test_request) { double }
+  let(:worker_class) { Clusters::Applications::UninstallWorker }
+
+  subject { service.execute(test_request) }
+
+  before do
+    allow(worker_class).to receive(:perform_async)
+  end
+
+  context 'application is not installed' do
+    it 'raises Clusters::Applications::BaseService::InvalidApplicationError' do
+      expect(worker_class).not_to receive(:perform_async)
+
+      expect { subject }
+        .to raise_exception { Clusters::Applications::BaseService::InvalidApplicationError }
+        .and not_change { Clusters::Applications::Prometheus.count }
+        .and not_change { Clusters::Applications::Prometheus.with_status(:scheduled).count }
+    end
+  end
+
+  context 'application is installed' do
+    context 'application is schedulable' do
+      let!(:application) do
+        create(:clusters_applications_prometheus, :installed, cluster: cluster)
+      end
+
+      it 'makes application scheduled!' do
+        subject
+
+        expect(application.reload).to be_scheduled
+      end
+
+      it 'schedules UninstallWorker' do
+        expect(worker_class).to receive(:perform_async).with(application.name, application.id)
+
+        subject
+      end
+    end
+
+    context 'application is not schedulable' do
+      let!(:application) do
+        create(:clusters_applications_prometheus, :updating, cluster: cluster)
+      end
+
+      it 'raises StateMachines::InvalidTransition' do
+        expect(worker_class).not_to receive(:perform_async)
+
+        expect { subject }
+          .to raise_exception { StateMachines::InvalidTransition }
+          .and not_change { Clusters::Applications::Prometheus.with_status(:scheduled).count }
+      end
+    end
+  end
+end