3 files changed, 126 insertions, 0 deletions
diff --git a/spec/services/projects/prometheus/alerts/create_service_spec.rb b/spec/services/projects/prometheus/alerts/create_service_spec.rb
new file mode 100644
index 00000000000..50c776df734
--- /dev/null
+++ b/spec/services/projects/prometheus/alerts/create_service_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Projects::Prometheus::Alerts::CreateService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+
+  let(:service) { described_class.new(project, user, params) }
+
+  subject { service.execute }
+
+  describe '#execute' do
+    context 'with params' do
+      let_it_be(:environment) { create(:environment, project: project) }
+
+      let_it_be(:metric) do
+        create(:prometheus_metric, project: project)
+      end
+
+      let(:params) do
+        {
+          environment_id: environment.id,
+          prometheus_metric_id: metric.id,
+          operator: '<',
+          threshold: 1.0
+        }
+      end
+
+      it 'creates an alert' do
+        expect(subject).to be_persisted
+
+        expect(subject).to have_attributes(
+          project: project,
+          environment: environment,
+          prometheus_metric: metric,
+          operator: 'lt',
+          threshold: 1.0
+        )
+      end
+    end
+
+    context 'without params' do
+      let(:params) { {} }
+
+      it 'fails to create' do
+        expect(subject).to be_new_record
+        expect(subject).to be_invalid
+      end
+    end
+  end
+end
diff --git a/spec/services/projects/prometheus/alerts/destroy_service_spec.rb b/spec/services/projects/prometheus/alerts/destroy_service_spec.rb
new file mode 100644
index 00000000000..7205ace8308
--- /dev/null
+++ b/spec/services/projects/prometheus/alerts/destroy_service_spec.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Projects::Prometheus::Alerts::DestroyService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:alert) { create(:prometheus_alert, project: project) }
+
+  let(:service) { described_class.new(project, user, nil) }
+
+  describe '#execute' do
+    subject { service.execute(alert) }
+
+    it 'deletes the alert' do
+      expect(subject).to be_truthy
+
+      expect(alert).to be_destroyed
+    end
+  end
+end
diff --git a/spec/services/projects/prometheus/alerts/update_service_spec.rb b/spec/services/projects/prometheus/alerts/update_service_spec.rb
new file mode 100644
index 00000000000..8a99c2679f7
--- /dev/null
+++ b/spec/services/projects/prometheus/alerts/update_service_spec.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Projects::Prometheus::Alerts::UpdateService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:environment) { create(:environment, project: project) }
+
+  let_it_be(:alert) do
+    create(:prometheus_alert, project: project, environment: environment)
+  end
+
+  let(:service) { described_class.new(project, user, params) }
+
+  let(:params) do
+    {
+      environment_id: alert.environment_id,
+      prometheus_metric_id: alert.prometheus_metric_id,
+      operator: '==',
+      threshold: 2.0
+    }
+  end
+
+  describe '#execute' do
+    subject { service.execute(alert) }
+
+    context 'with valid params' do
+      it 'updates the alert' do
+        expect(subject).to be_truthy
+
+        expect(alert.reload).to have_attributes(
+          operator: 'eq',
+          threshold: 2.0
+        )
+      end
+    end
+
+    context 'with invalid params' do
+      let(:other_environment) { create(:environment) }
+
+      before do
+        params[:environment_id] = other_environment.id
+      end
+
+      it 'fails to update' do
+        expect(subject).to be_falsey
+
+        expect(alert).to be_invalid
+      end
+    end
+  end
+end