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prometheus_metrics_spec.rb « importers « dashboard « metrics « gitlab « lib « spec - gitlab.com/gitlab-org/gitlab-foss.git - Unnamed repository; edit this file 'description' to name the repository.
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# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Gitlab::Metrics::Dashboard::Importers::PrometheusMetrics do
  include MetricsDashboardHelpers

  describe '#execute' do
    let(:project) { create(:project) }
    let(:dashboard_path) { 'path/to/dashboard.yml' }
    let(:prometheus_adapter) { double('adapter', clear_prometheus_reactive_cache!: nil) }

    subject { described_class.new(dashboard_hash, project: project, dashboard_path: dashboard_path) }

    context 'valid dashboard' do
      let(:dashboard_hash) { load_sample_dashboard }

      context 'with all new metrics' do
        it 'creates PrometheusMetrics' do
          expect { subject.execute }.to change { PrometheusMetric.count }.by(3)
        end
      end

      context 'with existing metrics' do
        let(:existing_metric_attributes) do
          {
            project: project,
            identifier: 'metric_b',
            title: 'overwrite',
            y_label: 'overwrite',
            query: 'overwrite',
            unit: 'overwrite',
            legend: 'overwrite',
            dashboard_path: dashboard_path
          }
        end

        let!(:existing_metric) do
          create(:prometheus_metric, existing_metric_attributes)
        end

        it 'updates existing PrometheusMetrics' do
          subject.execute

          expect(existing_metric.reload.attributes.with_indifferent_access).to include({
            title: 'Super Chart B',
            y_label: 'y_label',
            query: 'query',
            unit: 'unit',
            legend: 'Legend Label'
          })
        end

        it 'creates new PrometheusMetrics' do
          expect { subject.execute }.to change { PrometheusMetric.count }.by(2)
        end

        context 'with stale metrics' do
          let!(:stale_metric) do
            create(:prometheus_metric,
              project: project,
              identifier: 'stale_metric',
              dashboard_path: dashboard_path,
              group: 3
            )
          end

          it 'updates existing PrometheusMetrics' do
            subject.execute

            expect(existing_metric.reload.attributes.with_indifferent_access).to include({
              title: 'Super Chart B',
              y_label: 'y_label',
              query: 'query',
              unit: 'unit',
              legend: 'Legend Label'
            })
          end

          it 'deletes stale metrics' do
            subject.execute

            expect { stale_metric.reload }.to raise_error(ActiveRecord::RecordNotFound)
          end
        end
      end
    end

    context 'invalid dashboard' do
      let(:dashboard_hash) { {} }

      it 'returns false' do
        expect(subject.execute).to eq(false)
      end
    end
  end
end