gitlab-org--gitlab-foss/spec/features/markdown_spec.rb

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require 'spec_helper'
require 'erb'
# This feature spec is intended to be a comprehensive exercising of all of
# GitLab's non-standard Markdown parsing and the integration thereof.
#
# These tests should be very high-level. Anything low-level belongs in the specs
# for the corresponding HTML::Pipeline filter or helper method.
#
# The idea is to pass a Markdown document through our entire processing stack.
#
# The process looks like this:
#
# Raw Markdown
# -> `markdown` helper
# -> Redcarpet::Render::GitlabHTML converts Markdown to HTML
# -> Post-process HTML
# -> `gfm` helper
# -> HTML::Pipeline
# -> SanitizationFilter
# -> Other filters, depending on pipeline
# -> `html_safe`
# -> Template
#
# See the MarkdownFeature class for setup details.
describe 'GitLab Markdown', feature: true do
include Capybara::Node::Matchers
include GitlabMarkdownHelper
include MarkdownMatchers
# Sometimes it can be useful to see the parsed output of the Markdown document
# for debugging. Call this method to write the output to
# `tmp/capybara/<filename>.html`.
def write_markdown(filename = 'markdown_spec')
File.open(Rails.root.join("tmp/capybara/#{filename}.html"), 'w') do |file|
file.puts @html
end
end
def doc(html = @html)
Nokogiri::HTML::DocumentFragment.parse(html)
end
# Shared behavior that all pipelines should exhibit
shared_examples 'all pipelines' do
describe 'Redcarpet extensions' do
it 'does not parse emphasis inside of words' do
expect(doc.to_html).not_to match('foo<em>bar</em>baz')
end
it 'parses table Markdown' do
aggregate_failures do
expect(doc).to have_selector('th:contains("Header")')
expect(doc).to have_selector('th:contains("Row")')
expect(doc).to have_selector('th:contains("Example")')
end
end
it 'allows Markdown in tables' do
expect(doc.at_css('td:contains("Baz")').children.to_html).
to eq '<strong>Baz</strong>'
end
it 'parses fenced code blocks' do
aggregate_failures do
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expect(doc).to have_selector('pre.code.highlight.js-syntax-highlight.c')
expect(doc).to have_selector('pre.code.highlight.js-syntax-highlight.python')
end
end
it 'parses strikethroughs' do
expect(doc).to have_selector(%{del:contains("and this text doesn't")})
end
it 'parses superscript' do
expect(doc).to have_selector('sup', count: 2)
end
end
describe 'SanitizationFilter' do
it 'permits b elements' do
expect(doc).to have_selector('b:contains("b tag")')
end
it 'permits em elements' do
expect(doc).to have_selector('em:contains("em tag")')
end
it 'permits code elements' do
expect(doc).to have_selector('code:contains("code tag")')
end
it 'permits kbd elements' do
expect(doc).to have_selector('kbd:contains("s")')
end
it 'permits strike elements' do
expect(doc).to have_selector('strike:contains(Emoji)')
end
it 'permits img elements' do
expect(doc).to have_selector('img[src*="smile.png"]')
end
it 'permits br elements' do
expect(doc).to have_selector('br')
end
it 'permits hr elements' do
expect(doc).to have_selector('hr')
end
it 'permits span elements' do
expect(doc).to have_selector('span:contains("span tag")')
end
it 'permits style attribute in th elements' do
aggregate_failures do
expect(doc.at_css('th:contains("Header")')['style']).to eq 'text-align: center'
expect(doc.at_css('th:contains("Row")')['style']).to eq 'text-align: right'
expect(doc.at_css('th:contains("Example")')['style']).to eq 'text-align: left'
end
end
it 'permits style attribute in td elements' do
aggregate_failures do
expect(doc.at_css('td:contains("Foo")')['style']).to eq 'text-align: center'
expect(doc.at_css('td:contains("Bar")')['style']).to eq 'text-align: right'
expect(doc.at_css('td:contains("Baz")')['style']).to eq 'text-align: left'
end
end
it 'removes `rel` attribute from links' do
expect(doc).not_to have_selector('a[rel="bookmark"]')
end
it "removes `href` from `a` elements if it's fishy" do
expect(doc).not_to have_selector('a[href*="javascript"]')
end
end
describe 'Escaping' do
it 'escapes non-tag angle brackets' do
table = doc.css('table').last.at_css('tbody')
expect(table.at_xpath('.//tr[1]/td[3]').inner_html).to eq '1 &lt; 3 &amp; 5'
end
end
describe 'Edge Cases' do
it 'allows markup inside link elements' do
aggregate_failures do
expect(doc.at_css('a[href="#link-emphasis"]').to_html).
to eq %{<a href="#link-emphasis"><em>text</em></a>}
expect(doc.at_css('a[href="#link-strong"]').to_html).
to eq %{<a href="#link-strong"><strong>text</strong></a>}
expect(doc.at_css('a[href="#link-code"]').to_html).
to eq %{<a href="#link-code"><code>text</code></a>}
end
end
end
describe 'ExternalLinkFilter' do
it 'adds nofollow to external link' do
link = doc.at_css('a:contains("Google")')
expect(link.attr('rel')).to match 'nofollow'
end
it 'ignores internal link' do
link = doc.at_css('a:contains("GitLab Root")')
expect(link.attr('rel')).not_to match 'nofollow'
end
end
end
context 'default pipeline' do
before(:all) do
@feat = MarkdownFeature.new
# `markdown` helper expects a `@project` variable
@project = @feat.project
@html = markdown(@feat.raw_markdown)
end
it_behaves_like 'all pipelines'
it 'includes RelativeLinkFilter' do
expect(doc).to parse_relative_links
end
it 'includes EmojiFilter' do
expect(doc).to parse_emoji
end
it 'includes TableOfContentsFilter' do
expect(doc).to create_header_links
end
it 'includes AutolinkFilter' do
expect(doc).to create_autolinks
end
it 'includes all reference filters' do
aggregate_failures do
expect(doc).to reference_users
expect(doc).to reference_issues
expect(doc).to reference_merge_requests
expect(doc).to reference_snippets
expect(doc).to reference_commit_ranges
expect(doc).to reference_commits
expect(doc).to reference_labels
end
end
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it 'includes TaskListFilter' do
expect(doc).to parse_task_lists
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end
end
# Fake a `current_user` helper
def current_user
@feat.user
end
end