1 files changed, 151 insertions, 0 deletions
diff --git a/spec/services/metrics/dashboard/dynamic_embed_service_spec.rb b/spec/services/metrics/dashboard/dynamic_embed_service_spec.rb
new file mode 100644
index 00000000000..a0f7315f750
--- /dev/null
+++ b/spec/services/metrics/dashboard/dynamic_embed_service_spec.rb
@@ -0,0 +1,151 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Metrics::Dashboard::DynamicEmbedService, :use_clean_rails_memory_store_caching do
+  include MetricsDashboardHelpers
+
+  set(:project) { build(:project) }
+  set(:user) { create(:user) }
+  set(:environment) { create(:environment, project: project) }
+
+  before do
+    project.add_maintainer(user)
+  end
+
+  let(:dashboard_path) { '.gitlab/dashboards/test.yml' }
+  let(:group) { 'Group A' }
+  let(:title) { 'Super Chart A1' }
+  let(:y_label) { 'y_label' }
+
+  describe '.valid_params?' do
+    let(:valid_params) do
+      {
+        embedded: true,
+        dashboard_path: dashboard_path,
+        group: group,
+        title: title,
+        y_label: y_label
+      }
+    end
+
+    subject { described_class.valid_params?(params) }
+
+    let(:params) { valid_params }
+
+    it { is_expected.to be_truthy }
+
+    context 'not embedded' do
+      let(:params) { valid_params.except(:embedded) }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'undefined dashboard' do
+      let(:params) { valid_params.except(:dashboard_path) }
+
+      it { is_expected.to be_truthy }
+    end
+
+    context 'missing dashboard' do
+      let(:dashboard) { '' }
+
+      it { is_expected.to be_truthy }
+    end
+
+    context 'missing group' do
+      let(:group) { '' }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'missing title' do
+      let(:title) { '' }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'undefined y-axis label' do
+      let(:params) { valid_params.except(:y_label) }
+
+      it { is_expected.to be_falsey }
+    end
+  end
+
+  describe '#get_dashboard' do
+    let(:service_params) do
+      [
+        project,
+        user,
+        {
+          environment: environment,
+          dashboard_path: dashboard_path,
+          group: group,
+          title: title,
+          y_label: y_label
+        }
+      ]
+    end
+
+    let(:service_call) { described_class.new(*service_params).get_dashboard }
+
+    context 'when the dashboard does not exist' do
+      it_behaves_like 'misconfigured dashboard service response', :not_found
+    end
+
+    context 'when the dashboard is exists' do
+      let(:project) { project_with_dashboard(dashboard_path) }
+
+      it_behaves_like 'valid embedded dashboard service response'
+      it_behaves_like 'raises error for users with insufficient permissions'
+
+      it 'caches the unprocessed dashboard for subsequent calls' do
+        expect(YAML).to receive(:safe_load).once.and_call_original
+
+        described_class.new(*service_params).get_dashboard
+        described_class.new(*service_params).get_dashboard
+      end
+
+      context 'when the specified group is not present on the dashboard' do
+        let(:group) { 'Group Not Found' }
+
+        it_behaves_like 'misconfigured dashboard service response', :not_found
+      end
+
+      context 'when the specified title is not present on the dashboard' do
+        let(:title) { 'Title Not Found' }
+
+        it_behaves_like 'misconfigured dashboard service response', :not_found
+      end
+
+      context 'when the specified y-axis label is not present on the dashboard' do
+        let(:y_label) { 'Y-Axis Not Found' }
+
+        it_behaves_like 'misconfigured dashboard service response', :not_found
+      end
+    end
+
+    shared_examples 'uses system dashboard' do
+      it 'uses the default dashboard' do
+        expect(Gitlab::Metrics::Dashboard::Finder)
+        .to receive(:find_raw)
+        .with(project, dashboard_path: system_dashboard_path)
+        .once
+
+        service_call
+      end
+    end
+
+    context 'when the dashboard is nil' do
+      let(:dashboard_path) { nil }
+
+      it_behaves_like 'uses system dashboard'
+    end
+
+    context 'when the dashboard is not present' do
+      let(:dashboard_path) { '' }
+
+      it_behaves_like 'uses system dashboard'
+    end
+  end
+end