rails/railties/test/generators/scaffold_generator_test.rb

require 'generators/generators_test_helper'
require 'rails/generators/rails/scaffold/scaffold_generator'

class ScaffoldGeneratorTest < Rails::Generators::TestCase
  include GeneratorsTestHelper
  arguments %w(product_line title:string price:integer)

  setup :copy_routes

  def test_scaffold_on_invoke
    run_generator

    # Model
    assert_file "app/models/product_line.rb", /class ProductLine < ActiveRecord::Base/
    assert_file "test/unit/product_line_test.rb", /class ProductLineTest < ActiveSupport::TestCase/
    assert_file "test/fixtures/product_lines.yml"
    assert_migration "db/migrate/create_product_lines.rb"

    # Route
    assert_file "config/routes.rb" do |route|
      assert_match /resources :product_lines$/, route
    end

    # Controller
    assert_file "app/controllers/product_lines_controller.rb" do |content|
      assert_match /class ProductLinesController < ApplicationController/, content

      assert_instance_method :index, content do |m|
        assert_match /@product_lines = ProductLine\.all/, m
      end

      assert_instance_method :show, content do |m|
        assert_match /@product_line = ProductLine\.find\(params\[:id\]\)/, m
      end

      assert_instance_method :new, content do |m|
        assert_match /@product_line = ProductLine\.new/, m
      end

      assert_instance_method :edit, content do |m|
        assert_match /@product_line = ProductLine\.find\(params\[:id\]\)/, m
      end

      assert_instance_method :create, content do |m|
        assert_match /@product_line = ProductLine\.new\(params\[:product_line\]\)/, m
        assert_match /@product_line\.save/, m
        assert_match /@product_line\.errors/, m
      end

      assert_instance_method :update, content do |m|
        assert_match /@product_line = ProductLine\.find\(params\[:id\]\)/, m
        assert_match /@product_line\.update_attributes\(params\[:product_line\]\)/, m
        assert_match /@product_line\.errors/, m
      end

      assert_instance_method :destroy, content do |m|
        assert_match /@product_line = ProductLine\.find\(params\[:id\]\)/, m
        assert_match /@product_line\.destroy/, m
      end
    end

    assert_file "test/functional/product_lines_controller_test.rb",
                /class ProductLinesControllerTest < ActionController::TestCase/

    # Views
    %w(
      index
      edit
      new
      show
      _form
    ).each { |view| assert_file "app/views/product_lines/#{view}.html.erb" }
    assert_no_file "app/views/layouts/product_lines.html.erb"

    # Helpers
    assert_file "app/helpers/product_lines_helper.rb"
    assert_file "test/unit/helpers/product_lines_helper_test.rb"

    # Stylesheets
    assert_file "public/stylesheets/scaffold.css"
  end

  def test_scaffold_on_revoke
    run_generator
    run_generator ["product_line"], :behavior => :revoke

    # Model
    assert_no_file "app/models/product_line.rb"
    assert_no_file "test/unit/product_line_test.rb"
    assert_no_file "test/fixtures/product_lines.yml"
    assert_no_migration "db/migrate/create_product_lines.rb"

    # Route
    assert_file "config/routes.rb" do |route|
      assert_no_match /resources :product_lines$/, route
    end

    # Controller
    assert_no_file "app/controllers/product_lines_controller.rb"
    assert_no_file "test/functional/product_lines_controller_test.rb"

    # Views
    assert_no_file "app/views/product_lines"
    assert_no_file "app/views/layouts/product_lines.html.erb"

    # Helpers
    assert_no_file "app/helpers/product_lines_helper.rb"
    assert_no_file "test/unit/helpers/product_lines_helper_test.rb"

    # Stylesheets (should not be removed)
    assert_file "public/stylesheets/scaffold.css"
  end
end