# frozen_string_literal: true

require 'spec_helper'

describe Mongo::Monitoring do
  describe '#dup' do
    let(:monitoring) do
      described_class.new
    end

    let(:copy) do
      monitoring.dup
    end

    it 'dups the subscribers' do
      expect(monitoring.subscribers).not_to equal(copy.subscribers)
    end

    it 'keeps the same subscriber instances' do
      expect(monitoring.subscribers).to eq(copy.subscribers)
    end

    context 'when adding to the copy' do
      let(:subscriber) do
        double('subscriber')
      end

      before do
        copy.subscribe('topic', subscriber)
      end

      it 'does not modify the original subscribers' do
        expect(monitoring.subscribers).not_to eq(copy.subscribers)
      end
    end
  end

  describe '#initialize' do
    context 'when no monitoring options provided' do
      let(:monitoring) do
        described_class.new
      end

      it 'includes the global subscribers' do
        expect(monitoring.subscribers.size).to eq(7)
      end
    end

    context 'when monitoring options provided' do
      context 'when monitoring is true' do
        let(:monitoring) do
          described_class.new(monitoring: true)
        end

        it 'includes the global subscribers' do
          expect(monitoring.subscribers.size).to eq(7)
        end
      end

      context 'when monitoring is false' do
        let(:monitoring) do
          described_class.new(monitoring: false)
        end

        it 'does not include the global subscribers' do
          expect(monitoring.subscribers).to be_empty
        end
      end
    end
  end

  describe '#subscribe' do
    let(:monitoring) do
      described_class.new(monitoring: false)
    end

    let(:subscriber) do
      double('subscriber')
    end

    it 'subscribes to the topic' do
      monitoring.subscribe('topic', subscriber)
      expect(monitoring.subscribers['topic']).to eq([ subscriber ])
    end

    it 'subscribes to the topic twice' do
      monitoring.subscribe('topic', subscriber)
      monitoring.subscribe('topic', subscriber)
      expect(monitoring.subscribers['topic']).to eq([ subscriber, subscriber ])
    end
  end

  describe '#unsubscribe' do
    let(:monitoring) do
      described_class.new(monitoring: false)
    end

    let(:subscriber) do
      double('subscriber')
    end

    it 'unsubscribes from the topic' do
      monitoring.subscribe('topic', subscriber)
      monitoring.unsubscribe('topic', subscriber)
      expect(monitoring.subscribers['topic']).to eq([])
    end

    it 'unsubscribes from the topic when not subscribed' do
      monitoring.unsubscribe('topic', subscriber)
      expect(monitoring.subscribers['topic']).to eq([])
    end
  end

  describe '#started' do
    let(:monitoring) do
      described_class.new(monitoring: false)
    end

    let(:subscriber) do
      double('subscriber')
    end

    let(:event) do
      double('event')
    end

    before do
      monitoring.subscribe('topic', subscriber)
    end

    it 'calls the started method on each subscriber' do
      expect(subscriber).to receive(:started).with(event)
      monitoring.started('topic', event)
    end
  end

  describe '#succeeded' do
    let(:monitoring) do
      described_class.new(monitoring: false)
    end

    let(:subscriber) do
      double('subscriber')
    end

    let(:event) do
      double('event')
    end

    before do
      monitoring.subscribe('topic', subscriber)
    end

    it 'calls the succeeded method on each subscriber' do
      expect(subscriber).to receive(:succeeded).with(event)
      monitoring.succeeded('topic', event)
    end
  end

  describe '#failed' do
    let(:monitoring) do
      described_class.new(monitoring: false)
    end

    let(:subscriber) do
      double('subscriber')
    end

    let(:event) do
      double('event')
    end

    before do
      monitoring.subscribe('topic', subscriber)
    end

    it 'calls the failed method on each subscriber' do
      expect(subscriber).to receive(:failed).with(event)
      monitoring.failed('topic', event)
    end
  end
end
