rails--rails/actionpack/test/controller/render_json_test.rb

require 'abstract_unit'
require 'controller/fake_models'
require 'active_support/logger'
require 'pathname'

class RenderJsonTest < ActionController::TestCase
  class JsonRenderable
    def as_json(options={})
      hash = { :a => :b, :c => :d, :e => :f }
      hash.except!(*options[:except]) if options[:except]
      hash
    end

    def to_json(options = {})
      super :except => [:c, :e]
    end
  end

  class TestController < ActionController::Base
    protect_from_forgery

    def self.controller_path
      'test'
    end

    def render_json_nil
      render :json => nil
    end

    def render_json_render_to_string
      render plain: render_to_string(json: '[]')
    end

    def render_json_hello_world
      render :json => ActiveSupport::JSON.encode(:hello => 'world')
    end

    def render_json_hello_world_with_status
      render :json => ActiveSupport::JSON.encode(:hello => 'world'), :status => 401
    end

    def render_json_hello_world_with_callback
      render :json => ActiveSupport::JSON.encode(:hello => 'world'), :callback => 'alert'
    end

    def render_json_with_custom_content_type
      render :json => ActiveSupport::JSON.encode(:hello => 'world'), :content_type => 'text/javascript'
    end

    def render_symbol_json
      render :json => ActiveSupport::JSON.encode(:hello => 'world')
    end

    def render_json_with_render_to_string
      render :json => {:hello => render_to_string(:partial => 'partial')}
    end

    def render_json_with_extra_options
      render :json => JsonRenderable.new, :except => [:c, :e]
    end

    def render_json_without_options
      render :json => JsonRenderable.new
    end
  end

  tests TestController

  def setup
    # enable a logger so that (e.g.) the benchmarking stuff runs, so we can get
    # a more accurate simulation of what happens in "real life".
    super
    @controller.logger = ActiveSupport::Logger.new(nil)

    @request.host = "www.nextangle.com"
  end

  def test_render_json_nil
    get :render_json_nil
    assert_equal 'null', @response.body
    assert_equal 'application/json', @response.content_type
  end

  def test_render_json_render_to_string
    get :render_json_render_to_string
    assert_equal '[]', @response.body
  end


  def test_render_json
    get :render_json_hello_world
    assert_equal '{"hello":"world"}', @response.body
    assert_equal 'application/json', @response.content_type
  end

  def test_render_json_with_status
    get :render_json_hello_world_with_status
    assert_equal '{"hello":"world"}', @response.body
    assert_equal 401, @response.status
  end

  def test_render_json_with_callback
    get :render_json_hello_world_with_callback, xhr: true
    assert_equal '/**/alert({"hello":"world"})', @response.body
    assert_equal 'text/javascript', @response.content_type
  end

  def test_render_json_with_custom_content_type
    get :render_json_with_custom_content_type, xhr: true
    assert_equal '{"hello":"world"}', @response.body
    assert_equal 'text/javascript', @response.content_type
  end

  def test_render_symbol_json
    get :render_symbol_json
    assert_equal '{"hello":"world"}', @response.body
    assert_equal 'application/json', @response.content_type
  end

  def test_render_json_with_render_to_string
    get :render_json_with_render_to_string
    assert_equal '{"hello":"partial html"}', @response.body
    assert_equal 'application/json', @response.content_type
  end

  def test_render_json_forwards_extra_options
    get :render_json_with_extra_options
    assert_equal '{"a":"b"}', @response.body
    assert_equal 'application/json', @response.content_type
  end

  def test_render_json_calls_to_json_from_object
    get :render_json_without_options
    assert_equal '{"a":"b"}', @response.body
  end
end