docbrown/spec/models/chat_channel_spec.rb

require "rails_helper"

RSpec.describe ChatChannel, type: :model do
  let(:chat_channel) { create(:chat_channel) }

  let_it_be(:users) { create_list(:user, 2) }

  it { is_expected.to have_many(:messages).dependent(:destroy) }
  it { is_expected.to have_many(:chat_channel_memberships).dependent(:destroy) }
  it { is_expected.to have_many(:users) }
  it { is_expected.to validate_presence_of(:channel_type) }

  describe "#clear_channel" do
    before { allow(Pusher).to receive(:trigger) }

    it "clears chat" do
      create(:message, chat_channel: chat_channel, user: create(:user))
      chat_channel.reload
      expect(chat_channel.messages.size).to be_positive
      chat_channel.clear_channel
      expect(chat_channel.messages.size).to eq(0)
    end
  end

  describe "#create_with_users" do
    it "creates channel with users" do
      chat_channel = described_class.create_with_users(users: users)
      expect(chat_channel.users.size).to eq(users.size)
      expect(chat_channel.has_member?(users.first)).to be(true)
      expect(chat_channel.has_member?(users.last)).to be(true)
    end

    it "lists active memberships" do
      chat_channel = described_class.create_with_users(users: users)
      expect(chat_channel.active_users.size).to eq(users.size)
      expect(chat_channel.channel_users.size).to eq(users.size)
    end
  end

  describe "#active_users" do
    it "decreases active users if one leaves" do
      chat_channel = described_class.create_with_users(users: users)
      expect(chat_channel.active_users.size).to eq(users.size)
      expect(chat_channel.channel_users.size).to eq(users.size)
      ChatChannelMembership.last.update(status: "left_channel")
      expect(chat_channel.active_users.size).to eq(users.size - 1)
      expect(chat_channel.channel_users.size).to eq(users.size - 1)
    end
  end

  describe "#remove_user" do
    it "removes a user from a channel" do
      chat_channel.add_users(users.first)
      expect(chat_channel.chat_channel_memberships.exists?(user_id: users.first.id)).to be(true)
      chat_channel.remove_user(users.first)
      expect(chat_channel.chat_channel_memberships.exists?(user_id: users.first.id)).to be(false)
    end
  end
end