mailer_spec.rb

# frozen_string_literal: true

require "spec_helper"

describe "ActionMailer line", skip: !defined?(ActionMailer) do
  before do
    module ::DeliveryTesting
      class TestMailer < ActionMailer::Base
        def do_something(*)
        end

        private

        def do_nothing
        end
      end

      class TestDelivery < ActiveDelivery::Base
      end
    end
  end

  after do
    Object.send(:remove_const, :DeliveryTesting)
  end

  let(:delivery_class) { ::DeliveryTesting::TestDelivery }
  let(:mailer_class) { ::DeliveryTesting::TestMailer }

  describe ".mailer_class" do
    it "infers mailer from delivery name" do
      expect(delivery_class.mailer_class).to be_eql(mailer_class)
    end
  end

  describe ".notify" do
    let(:mailer_instance) { double("mailer") }

    before { allow(mailer_class).to receive(:do_something).and_return(mailer_instance) }

    describe ".notify" do
      it "calls deliver_later on mailer instance" do
        expect(mailer_instance).to receive(:deliver_later)

        delivery_class.notify(:do_something)
      end

      it "do nothing when mailer doesn't have provided public method" do
        delivery_class.notify(:do_nothing)
      end

      context "with arguments" do
        it "process integer" do
          expect(mailer_instance).to receive(:deliver_later)

          delivery_class.notify(:do_something, 1)
        end

        it "process hash" do
          expect(mailer_instance).to receive(:deliver_later)

          delivery_class.notify(:do_something, { key: :value })
        end
      end
    end

    describe ".notify!" do
      it "calls deliver_now on mailer instance" do
        expect(mailer_instance).to receive(:deliver_now)

        delivery_class.notify!(:do_something)
      end
    end
  end
end