1 files changed, 78 insertions, 0 deletions
diff --git a/spec/features/markdown/metrics_spec.rb b/spec/features/markdown/metrics_spec.rb
new file mode 100644
index 00000000000..4de67cfcdbe
--- /dev/null
+++ b/spec/features/markdown/metrics_spec.rb
@@ -0,0 +1,78 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Metrics rendering', :js, :use_clean_rails_memory_store_caching do
+  include PrometheusHelpers
+
+  let(:user) { create(:user) }
+  let(:project) { create(:prometheus_project) }
+  let(:environment) { create(:environment, project: project) }
+  let(:issue) { create(:issue, project: project, description: description) }
+  let(:description) { "See [metrics dashboard](#{metrics_url}) for info." }
+  let(:metrics_url) { metrics_project_environment_url(project, environment) }
+
+  before do
+    configure_host
+    import_common_metrics
+    stub_any_prometheus_request_with_response
+
+    project.add_developer(user)
+
+    sign_in(user)
+  end
+
+  after do
+    restore_host
+  end
+
+  it 'shows embedded metrics' do
+    visit project_issue_path(project, issue)
+
+    expect(page).to have_css('div.prometheus-graph')
+    expect(page).to have_text('Memory Usage (Total)')
+    expect(page).to have_text('Core Usage (Total)')
+  end
+
+  context 'when dashboard params are in included the url' do
+    let(:metrics_url) { metrics_project_environment_url(project, environment, **chart_params) }
+
+    let(:chart_params) do
+      {
+        group: 'System metrics (Kubernetes)',
+        title: 'Memory Usage (Pod average)',
+        y_label: 'Memory Used per Pod (MB)'
+      }
+    end
+
+    it 'shows embedded metrics for the specifiec chart' do
+      visit project_issue_path(project, issue)
+
+      expect(page).to have_css('div.prometheus-graph')
+      expect(page).to have_text(chart_params[:title])
+      expect(page).to have_text(chart_params[:y_label])
+    end
+  end
+
+  def import_common_metrics
+    ::Gitlab::DatabaseImporters::CommonMetrics::Importer.new.execute
+  end
+
+  def configure_host
+    @original_default_host = default_url_options[:host]
+    @original_gitlab_url = Gitlab.config.gitlab[:url]
+
+    # Ensure we create a metrics url with the right host.
+    # Configure host for route helpers in specs (also updates root_url):
+    default_url_options[:host] = Capybara.server_host
+
+    # Ensure we identify urls with the appropriate host.
+    # Configure host to include port in app:
+    Gitlab.config.gitlab[:url] = root_url.chomp('/')
+  end
+
+  def restore_host
+    default_url_options[:host] = @original_default_host
+    Gitlab.config.gitlab[:url] = @original_gitlab_url
+  end
+end