# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Gitlab::UsageDataCounters::KubernetesAgentCounter do
  described_class::KNOWN_EVENTS.each do |event|
    it_behaves_like 'a redis usage counter', 'Kubernetes Agent', event
    it_behaves_like 'a redis usage counter with totals', :kubernetes_agent, event => 1
  end

  describe '.increment_event_counts' do
    let(:events) do
      {
        'gitops_sync' => 1,
        'k8s_api_proxy_request' => 2
      }
    end

    subject { described_class.increment_event_counts(events) }

    it 'increments the specified counters by the new increment amount' do
      described_class.increment_event_counts(events)
      described_class.increment_event_counts(events)
      described_class.increment_event_counts(events)

      expect(described_class.totals).to eq(kubernetes_agent_gitops_sync: 3, kubernetes_agent_k8s_api_proxy_request: 6)
    end

    context 'event is unknown' do
      let(:events) do
        {
          'gitops_sync' => 1,
          'other_event' => 2
        }
      end

      it 'raises an ArgumentError' do
        expect(described_class).not_to receive(:increment_by)

        expect { subject }.to raise_error(ArgumentError, 'unknown event other_event')
      end
    end

    context 'increment is negative' do
      let(:events) do
        {
          'gitops_sync' => -1,
          'k8s_api_proxy_request' => 2
        }
      end

      it 'raises an ArgumentError' do
        expect(described_class).not_to receive(:increment_by)

        expect { subject }.to raise_error(ArgumentError, 'gitops_sync count must be greater than or equal to zero')
      end
    end
  end
end