RSpec send_file 测试

使用RSpec测试send_file功能

ruby
# Gemfile
group :development, :test do
  gem 'rspec-rails', '~> 5.0'
end

bash
rails generate rspec:install

ruby
# spec/controllers/downloads_controller_spec.rb
require 'rails_helper'
RSpec.describe DownloadsController, type: :controller do
  describe 'GET #download' do
    it 'sends the file as response' do
      file_path = Rails.root.join('public', 'sample_file.txt')
      allow(controller).to receive(:send_file).and_return(true)
      get :download, params: { file_path: 'sample_file.txt' }
      expect(controller).to have_received(:send_file).with(file_path, disposition: 'attachment')
      expect(response).to have_http_status(:ok)
    end
  end
end

bash
rspec