1 files changed, 55 insertions, 0 deletions
diff --git a/spec/services/clusters/applications/schedule_installation_service_spec.rb b/spec/services/clusters/applications/schedule_installation_service_spec.rb
new file mode 100644
index 00000000000..cf95361c935
--- /dev/null
+++ b/spec/services/clusters/applications/schedule_installation_service_spec.rb
@@ -0,0 +1,55 @@
+require 'spec_helper'
+
+describe Clusters::Applications::ScheduleInstallationService do
+  def count_scheduled
+    application_class&.with_status(:scheduled)&.count || 0
+  end
+
+  shared_examples 'a failing service' do
+    it 'raise an exception' do
+      expect(ClusterInstallAppWorker).not_to receive(:perform_async)
+      count_before = count_scheduled
+
+      expect { service.execute }.to raise_error(StandardError)
+      expect(count_scheduled).to eq(count_before)
+    end
+  end
+
+  describe '#execute' do
+    let(:application_class) { Clusters::Applications::Helm }
+    let(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+    let(:project) { cluster.project }
+    let(:service) { described_class.new(project, nil, cluster: cluster, application_class: application_class) }
+
+    it 'creates a new application' do
+      expect { service.execute }.to change { application_class.count }.by(1)
+    end
+
+    it 'make the application scheduled' do
+      expect(ClusterInstallAppWorker).to receive(:perform_async).with(application_class.application_name, kind_of(Numeric)).once
+
+      expect { service.execute }.to change { application_class.with_status(:scheduled).count }.by(1)
+    end
+
+    context 'when installation is already in progress' do
+      let(:application) { create(:cluster_applications_helm, :installing) }
+      let(:cluster) { application.cluster }
+
+      it_behaves_like 'a failing service'
+    end
+
+    context 'when application_class is nil' do
+      let(:application_class) { nil }
+
+      it_behaves_like 'a failing service'
+    end
+
+    context 'when application cannot be persisted' do
+      before do
+        expect_any_instance_of(application_class).to receive(:make_scheduled!).once.and_raise(ActiveRecord::RecordInvalid)
+      end
+
+      it_behaves_like 'a failing service'
+    end
+  end
+end