# frozen_string_literal: true
require "spec_helper"
module Roadie
describe AssetScanner do
let(:normal_provider) { TestProvider.new }
let(:external_provider) { ProviderList.empty }
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, a normal asset provider set, and an external asset provider set" do
scanner = AssetScanner.new dom, normal_provider, external_provider
expect(scanner.dom).to eq(dom)
expect(scanner.normal_asset_provider).to eq(normal_provider)
expect(scanner.external_asset_provider).to eq(external_provider)
end
describe "finding" do
it "returns nothing when no stylesheets are referenced" do
scanner = AssetScanner.new dom, normal_provider, external_provider
expect(scanner.find_css).to eq([])
end
it "finds all embedded stylesheets" do
dom = dom_document <<-HTML
HTML
scanner = AssetScanner.new dom, normal_provider, external_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, normal_provider, external_provider
expect(scanner.find_css).to have(1).stylesheet
end
it "finds normal referenced stylesheets through the normal provider" do
stylesheet = double "A stylesheet"
expect(normal_provider).to receive(:find_stylesheet!).with("/some/url.css").and_return stylesheet
dom = dom_fragment %()
scanner = AssetScanner.new dom, normal_provider, external_provider
expect(scanner.find_css).to eq([stylesheet])
end
it "finds external referenced stylesheets through the external provider" do
stylesheet = double "A stylesheet"
external_provider = TestProvider.new
expect(external_provider).to receive(:find_stylesheet!).with("//example.com/style.css").and_return stylesheet
dom = dom_fragment %()
scanner = AssetScanner.new dom, normal_provider, external_provider
expect(scanner.find_css).to eq([stylesheet])
end
it "ignores referenced print stylesheets" do
dom = dom_fragment %()
expect(normal_provider).not_to receive(:find_stylesheet!)
scanner = AssetScanner.new dom, normal_provider, external_provider
expect(scanner.find_css).to eq([])
end
it "does not look for externally referenced stylesheets from empty ProviderList" do
external_provider = ProviderList.empty
dom = dom_fragment %()
expect(external_provider).not_to receive(:find_stylesheet!)
scanner = AssetScanner.new dom, normal_provider, external_provider
expect(scanner.find_css).to eq([])
end
it "does not look for ignored referenced stylesheets" do
dom = dom_fragment %()
expect(normal_provider).not_to receive(:find_stylesheet!)
scanner = AssetScanner.new dom, normal_provider, external_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, normal_provider, external_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, normal_provider, external_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
normal_provider = TestProvider.new "/some/url.css" => "body { color: green; }"
scanner = AssetScanner.new dom, normal_provider, external_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.totally-ignored")
expect(dom).to have_selector("link.totally-ignored")
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
it "removes external references if provider is not empty" do
dom = dom_document <<-HTML
HTML
external_provider = ProviderList.wrap(NullProvider.new)
scanner = AssetScanner.new dom, normal_provider, external_provider
stylesheets = scanner.extract_css
expect(stylesheets).to have(1).stylesheets
expect(dom).to_not have_selector("link[href*=some]")
expect(dom).to have_selector("link[href*=other]")
end
end
end
end