# encoding: UTF-8
require 'spec_helper'
module Roadie
describe AssetScanner do
let(:provider) { TestProvider.new }
let(:dom) { dom_document "" }
def dom_fragment(html); Nokogiri::HTML.fragment html; end
def dom_document(html); Nokogiri::HTML.parse html; end
it "is initialized with a DOM tree and a asset provider set" do
scanner = AssetScanner.new dom, provider
expect(scanner.dom).to eq(dom)
expect(scanner.asset_provider).to eq(provider)
end
describe "finding" do
it "returns nothing when no stylesheets are referenced" do
scanner = AssetScanner.new dom, provider
expect(scanner.find_css).to eq([])
end
it "finds all embedded stylesheets" do
dom = dom_document <<-HTML
HTML
scanner = AssetScanner.new dom, provider
stylesheets = scanner.find_css
expect(stylesheets).to have(2).stylesheets
expect(stylesheets[0].to_s).to include("green")
expect(stylesheets[1].to_s).to include("red")
expect(stylesheets.first.name).to eq("(inline)")
end
it "does not find any embedded stylesheets marked for ignoring" do
dom = dom_document <<-HTML
HTML
scanner = AssetScanner.new dom, provider
expect(scanner.find_css).to have(1).stylesheet
end
it "finds referenced stylesheets through the provider" do
stylesheet = double "A stylesheet"
expect(provider).to receive(:find_stylesheet!).with("/some/url.css").and_return stylesheet
dom = dom_fragment %()
scanner = AssetScanner.new dom, provider
expect(scanner.find_css).to eq([stylesheet])
end
it "ignores referenced print stylesheets" do
dom = dom_fragment %()
expect(provider).not_to receive(:find_stylesheet!)
scanner = AssetScanner.new dom, provider
expect(scanner.find_css).to eq([])
end
it "does not look for ignored referenced stylesheets" do
dom = dom_fragment %()
expect(provider).not_to receive(:find_stylesheet!)
scanner = AssetScanner.new dom, provider
expect(scanner.find_css).to eq([])
end
it 'ignores HTML comments and CDATA sections' do
# TinyMCE posts invalid CSS. We support that just to be pragmatic.
dom = dom_fragment %()
scanner = AssetScanner.new dom, provider
stylesheet = scanner.find_css.first
expect(stylesheet.to_s).to include("green")
expect(stylesheet.to_s).not_to include("!--")
expect(stylesheet.to_s).not_to include("CDATA")
end
it "does not pick up scripts generating styles" do
dom = dom_fragment <<-HTML
HTML
scanner = AssetScanner.new dom, provider
expect(scanner.find_css).to eq([])
end
end
describe "extracting" do
it "returns the stylesheets found, and removes them from the DOM" do
dom = dom_document <<-HTML
Hello world!
HTML
provider = TestProvider.new "/some/url.css" => "body { color: green; }"
scanner = AssetScanner.new dom, provider
stylesheets = scanner.extract_css
expect(stylesheets).to have(2).stylesheets
expect(stylesheets[0].to_s).to include("span")
expect(stylesheets[1].to_s).to include("body")
expect(dom).to have_selector("html > head > title")
expect(dom).to have_selector("html > body > style[data-roadie-ignore]")
expect(dom).to have_selector("link[data-roadie-ignore]")
expect(dom).to have_selector("link[media=print]")
expect(dom).not_to have_selector("html > head > style")
expect(dom).not_to have_selector("html > head > link[href='/some/url.css']")
end
end
end
end