123456789_123456789_123456789_123456789_123456789_

Module: ActionView::TestCase::Behavior::ClassMethods

Relationships & Source Files
Defined in: actionview/lib/action_view/test_case.rb

Instance Attribute Summary

Instance Method Summary

Instance Attribute Details

#helper_class (rw)

[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 184

def helper_class
  @helper_class ||= determine_default_helper_class(name)
end

#helper_class=(value) (rw)

[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 182

attr_writer :helper_class

Instance Method Details

#determine_default_helper_class(name)

[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 164

def determine_default_helper_class(name)
  determine_constant_from_test_name(name) do |constant|
    Module === constant && !(Class === constant)
  end
end

#helper_method(*methods)

[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 170

def helper_method(*methods)
  # Almost a duplicate from ActionController::Helpers
  methods.flatten.each do |method|
    _helpers_for_modification.module_eval <<~end_eval, __FILE__, __LINE__ + 1
      def #{method}(*args, &block)                    # def current_user(*args, &block)
        _test_case.send(:'#{method}', *args, &block)  #   _test_case.send(:'current_user', *args, &block)
      end                                             # end
      ruby2_keywords(:'#{method}')
    end_eval
  end
end

#new

[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 188

def new(*)
  include_helper_modules!
  super
end

#register_parser(format, callable = nil, &block)

Register a callable to parse rendered content for a given template format.

Each registered parser will also define a href="FORMAT">rendered. helper method, where [FORMAT] corresponds to the value of the format argument.

By default, ::ActionView::TestCase defines parsers for:

These pre-registered parsers also define corresponding helpers:

  • :html - defines rendered.html

  • :json - defines rendered.json

Parameters

format

The name (as a ::Symbol) of the format used to render the content.

callable

The parser. A callable object that accepts the rendered string as its sole argument. Alternatively, the parser can be specified as a block.

Examples

test "renders HTML" do
  article = Article.create!(title: "Hello, world")

  render partial: "articles/article", locals: { article: article }

  assert_pattern { rendered.html.at("main h1") => { content: "Hello, world" } }
end

test "renders JSON" do
  article = Article.create!(title: "Hello, world")

  render formats: :json, partial: "articles/article", locals: { article: article }

  assert_pattern { rendered.json => { title: "Hello, world" } }
end

To parse the rendered content into RSS, register a call to RSS::Parser.parse:

register_parser :rss, -> rendered { RSS::Parser.parse(rendered) }

test "renders RSS" do
  article = Article.create!(title: "Hello, world")

  render formats: :rss, partial: article

  assert_equal "Hello, world", rendered.rss.items.last.title
end

To parse the rendered content into a Capybara::Simple::Node, re-register an :html parser with a call to Capybara.string:

register_parser :html, -> rendered { Capybara.string(rendered) }

test "renders HTML" do
  article = Article.create!(title: "Hello, world")

  render partial: article

  rendered.html.assert_css "h1", text: "Hello, world"
end
[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 148

def register_parser(format, callable = nil, &block)
  parser = callable || block || :itself.to_proc
  content_class.redefine_method(format) do
    parser.call(to_s)
  end
end

#tests(helper_class)

[ GitHub ]

  
# File 'actionview/lib/action_view/test_case.rb', line 155

def tests(helper_class)
  case helper_class
  when String, Symbol
    self.helper_class = "#{helper_class.to_s.underscore}_helper".camelize.safe_constantize
  when Module
    self.helper_class = helper_class
  end
end