require 'rails_helper' RSpec.describe Attachy::File, '#default' do before do allow(::Rails).to receive_message_chain(:application, :config_for).with(:attachy) do { 'default' => { 'image' => { 'public_id' => 'default', 'format' => 'png', 'version' => 1 } } } end end it 'returns a new file object with the config values' do default = described_class.default expect(default).to be_new_record expect(default.format).to eq 'png' expect(default.public_id).to eq 'default' expect(default.version).to eq '1' end end