thoughtbot--shoulda-matchers/lib/shoulda/matchers/action_controller/render_template_matcher.rb

87 lines
2.5 KiB
Ruby

module Shoulda
module Matchers
module ActionController
# The `render_template` matcher tests that an action renders a template
# or partial. In RSpec, it is very similar to rspec-rails's
# `render_template` matcher. In a test suite using Minitest + Shoulda, it
# provides a more expressive syntax over `assert_template`.
#
# class PostsController < ApplicationController
# def show
# end
# end
#
# # app/views/posts/show.html.erb
# <%= render 'sidebar' %>
#
# # RSpec
# RSpec.describe PostsController, type: :controller do
# describe 'GET #show' do
# before { get :show }
#
# it { should render_template('show') }
# it { should render_template(partial: '_sidebar') }
# end
# end
#
# # Minitest (Shoulda)
# class PostsControllerTest < ActionController::TestCase
# context 'GET #show' do
# setup { get :show }
#
# should render_template('show')
# should render_template(partial: '_sidebar')
# end
# end
#
# @return [RenderTemplateMatcher]
#
def render_template(options = {}, message = nil)
RenderTemplateMatcher.new(options, message, self)
end
# @private
class RenderTemplateMatcher
attr_reader :failure_message, :failure_message_when_negated
def initialize(options, message, context)
@options = options
@message = message
@template = options.is_a?(Hash) ? options[:partial] : options
@context = context
@controller = nil
@failure_message = nil
@failure_message_when_negated = nil
end
def matches?(controller)
@controller = controller
renders_template?
end
def description
"render template #{@template}"
end
def in_context(context)
@context = context
self
end
private
def renders_template?
begin
@context.__send__(:assert_template, @options, @message)
@failure_message_when_negated = "Didn't expect to render #{@template}"
true
rescue Shoulda::Matchers.assertion_exception_class => error
@failure_message = error.message
false
end
end
end
end
end
end