1 files changed, 226 insertions, 0 deletions
diff --git a/spec/lib/gitlab/alerting/alert_spec.rb b/spec/lib/gitlab/alerting/alert_spec.rb
new file mode 100644
index 00000000000..90e93d189e2
--- /dev/null
+++ b/spec/lib/gitlab/alerting/alert_spec.rb
@@ -0,0 +1,226 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Alerting::Alert do
+  let_it_be(:project) { create(:project) }
+
+  let(:alert) { build(:alerting_alert, project: project, payload: payload) }
+  let(:payload) { {} }
+
+  shared_context 'gitlab alert' do
+    let(:gitlab_alert_id) { gitlab_alert.prometheus_metric_id.to_s }
+    let!(:gitlab_alert) { create(:prometheus_alert, project: project) }
+
+    before do
+      payload['labels'] = { 'gitlab_alert_id' => gitlab_alert_id }
+    end
+  end
+
+  shared_examples 'invalid alert' do
+    it 'is invalid' do
+      expect(alert).not_to be_valid
+    end
+  end
+
+  shared_examples 'parse payload' do |*pairs|
+    context 'without payload' do
+      it { is_expected.to be_nil }
+    end
+
+    pairs.each do |pair|
+      context "with #{pair}" do
+        let(:value) { 'some value' }
+
+        before do
+          section, name = pair.split('/')
+          payload[section] = { name => value }
+        end
+
+        it { is_expected.to eq(value) }
+      end
+    end
+  end
+
+  describe '#gitlab_alert' do
+    subject { alert.gitlab_alert }
+
+    context 'without payload' do
+      it { is_expected.to be_nil }
+    end
+
+    context 'with gitlab alert' do
+      include_context 'gitlab alert'
+
+      it { is_expected.to eq(gitlab_alert) }
+    end
+
+    context 'with unknown gitlab alert' do
+      include_context 'gitlab alert' do
+        let(:gitlab_alert_id) { 'unknown' }
+      end
+
+      it { is_expected.to be_nil }
+    end
+  end
+
+  describe '#title' do
+    subject { alert.title }
+
+    it_behaves_like 'parse payload',
+      'annotations/title',
+      'annotations/summary',
+      'labels/alertname'
+
+    context 'with gitlab alert' do
+      include_context 'gitlab alert'
+
+      context 'with annotations/title' do
+        let(:value) { 'annotation title' }
+
+        before do
+          payload['annotations'] = { 'title' => value }
+        end
+
+        it { is_expected.to eq(gitlab_alert.title) }
+      end
+    end
+  end
+
+  describe '#description' do
+    subject { alert.description }
+
+    it_behaves_like 'parse payload', 'annotations/description'
+  end
+
+  describe '#annotations' do
+    subject { alert.annotations }
+
+    context 'without payload' do
+      it { is_expected.to eq([]) }
+    end
+
+    context 'with payload' do
+      before do
+        payload['annotations'] = { 'foo' => 'value1', 'bar' => 'value2' }
+      end
+
+      it 'parses annotations' do
+        expect(subject.size).to eq(2)
+        expect(subject.map(&:label)).to eq(%w[foo bar])
+        expect(subject.map(&:value)).to eq(%w[value1 value2])
+      end
+    end
+  end
+
+  describe '#environment' do
+    subject { alert.environment }
+
+    context 'without gitlab_alert' do
+      it { is_expected.to be_nil }
+    end
+
+    context 'with gitlab alert' do
+      include_context 'gitlab alert'
+
+      it { is_expected.to eq(gitlab_alert.environment) }
+    end
+  end
+
+  describe '#starts_at' do
+    subject { alert.starts_at }
+
+    context 'with empty startsAt' do
+      before do
+        payload['startsAt'] = nil
+      end
+
+      it { is_expected.to be_nil }
+    end
+
+    context 'with invalid startsAt' do
+      before do
+        payload['startsAt'] = 'invalid'
+      end
+
+      it { is_expected.to be_nil }
+    end
+
+    context 'with payload' do
+      let(:time) { Time.now.change(usec: 0) }
+
+      before do
+        payload['startsAt'] = time.rfc3339
+      end
+
+      it { is_expected.to eq(time) }
+    end
+  end
+
+  describe '#full_query' do
+    using RSpec::Parameterized::TableSyntax
+
+    subject { alert.full_query }
+
+    where(:generator_url, :expected_query) do
+      nil | nil
+      'http://localhost' | nil
+      'invalid url' | nil
+      'http://localhost:9090/graph?g1.expr=vector%281%29' | nil
+      'http://localhost:9090/graph?g0.expr=vector%281%29' | 'vector(1)'
+    end
+
+    with_them do
+      before do
+        payload['generatorURL'] = generator_url
+      end
+
+      it { is_expected.to eq(expected_query) }
+    end
+
+    context 'with gitlab alert' do
+      include_context 'gitlab alert'
+
+      before do
+        payload['generatorURL'] = 'http://localhost:9090/graph?g0.expr=vector%281%29'
+      end
+
+      it { is_expected.to eq(gitlab_alert.full_query) }
+    end
+  end
+
+  describe '#alert_markdown' do
+    subject { alert.alert_markdown }
+
+    it_behaves_like 'parse payload', 'annotations/gitlab_incident_markdown'
+  end
+
+  describe '#valid?' do
+    before do
+      payload.update(
+        'annotations' => { 'title' => 'some title' },
+        'startsAt' => Time.now.rfc3339
+      )
+    end
+
+    subject { alert }
+
+    it { is_expected.to be_valid }
+
+    context 'without project' do
+      # Redefine to prevent:
+      # project is a NilClass - rspec-set works with ActiveRecord models only
+      let(:alert) { build(:alerting_alert, project: nil, payload: payload) }
+
+      it { is_expected.not_to be_valid }
+    end
+
+    context 'without starts_at' do
+      before do
+        payload['startsAt'] = nil
+      end
+
+      it { is_expected.not_to be_valid }
+    end
+  end
+end