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293 lines
7.8 KiB
Ruby
293 lines
7.8 KiB
Ruby
# frozen_string_literal: true
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require 'rails_helper'
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RSpec.describe LinkDetailsExtractor do
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subject { described_class.new(original_url, html, nil) }
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let(:original_url) { 'https://example.com/dog.html?tracking=123' }
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describe '#canonical_url' do
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let(:html) { "<!doctype html><link rel='canonical' href='#{url}'>" }
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context 'when canonical URL points to the same host' do
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let(:url) { 'https://example.com/dog.html' }
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it 'ignores the canonical URLs' do
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expect(subject.canonical_url).to eq 'https://example.com/dog.html'
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end
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end
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context 'when canonical URL points to another host' do
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let(:url) { 'https://different.example.net/dog.html' }
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it 'ignores the canonical URLs' do
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expect(subject.canonical_url).to eq original_url
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end
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end
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context 'when canonical URL is set to "null"' do
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let(:url) { 'null' }
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it 'ignores the canonical URLs' do
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expect(subject.canonical_url).to eq original_url
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end
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end
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end
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context 'when only basic metadata is present' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html lang="en">
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<head>
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<title>Man bites dog</title>
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<meta name="description" content="A dog's tale">
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</head>
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</html>
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HTML
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it 'extracts the expected values from html metadata' do
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expect(subject)
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.to have_attributes(
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title: eq('Man bites dog'),
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description: eq("A dog's tale"),
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language: eq('en')
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)
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end
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end
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context 'when structured data is present' do
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let(:ld_json) do
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{
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'@context' => 'https://schema.org',
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'@type' => 'NewsArticle',
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'headline' => 'Man bites dog',
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'description' => "A dog's tale",
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'datePublished' => '2022-01-31T19:53:00+00:00',
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'author' => {
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'@type' => 'Organization',
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'name' => 'Charlie Brown',
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},
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'publisher' => {
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'@type' => 'NewsMediaOrganization',
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'name' => 'Pet News',
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'url' => 'https://example.com',
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},
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'inLanguage' => {
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name: 'English',
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alternateName: 'en',
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},
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}.to_json
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end
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<body>
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<script type="application/ld+json">
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#{ld_json}
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</script>
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</body>
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</html>
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HTML
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shared_examples 'structured data' do
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it 'extracts the expected values from structured data' do
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expect(subject)
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.to have_attributes(
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title: eq('Man bites dog'),
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description: eq("A dog's tale"),
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published_at: eq('2022-01-31T19:53:00+00:00'),
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author_name: eq('Charlie Brown'),
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provider_name: eq('Pet News'),
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language: eq('en')
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)
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end
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end
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context 'when is wrapped in CDATA tags' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<head>
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<script type="application/ld+json">
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//<![CDATA[
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#{ld_json}
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//]]>
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</script>
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</head>
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</html>
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HTML
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include_examples 'structured data'
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end
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context 'with the first tag is invalid JSON' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<body>
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<script type="application/ld+json">
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invalid LD+JSON
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</script>
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<script type="application/ld+json">
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#{ld_json}
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</script>
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</body>
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</html>
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HTML
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include_examples 'structured data'
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end
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context 'with the first tag is null' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<body>
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<script type="application/ld+json">
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null
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</script>
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<script type="application/ld+json">
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#{ld_json}
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</script>
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</body>
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</html>
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HTML
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include_examples 'structured data'
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end
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context 'with preceding block of unsupported LD+JSON' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<body>
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<script type="application/ld+json">
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[
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{
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"@context": "https://schema.org",
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"@type": "ItemList",
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"url": "https://example.com/cat.html",
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"name": "Man bites cat",
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"description": "A cat's tale"
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},
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{
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"@context": "https://schema.org",
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"@type": "BreadcrumbList",
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"itemListElement":[
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{
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"@type": "ListItem",
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"position": 1,
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"item": {
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"@id": "https://www.example.com",
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"name": "Cat News"
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}
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}
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]
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}
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]
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</script>
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<script type="application/ld+json">
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#{ld_json}
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</script>
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</body>
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</html>
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HTML
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include_examples 'structured data'
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end
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context 'with unsupported in same block LD+JSON' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<body>
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<script type="application/ld+json">
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[
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{
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"@context": "https://schema.org",
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"@type": "ItemList",
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"url": "https://example.com/cat.html",
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"name": "Man bites cat",
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"description": "A cat's tale"
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},
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#{ld_json}
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]
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</script>
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</body>
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</html>
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HTML
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include_examples 'structured data'
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end
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context 'with author names as array' do
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let(:ld_json) do
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{
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'@context' => 'https://schema.org',
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'@type' => 'NewsArticle',
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'headline' => 'A lot of authors',
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'description' => 'But we decided to cram them into one',
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'author' => {
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'@type' => 'Person',
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'name' => ['Author 1', 'Author 2'],
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},
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}.to_json
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end
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it 'joins author names' do
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expect(subject.author_name).to eq 'Author 1, Author 2'
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end
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end
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context 'with named graph' do
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let(:ld_json) do
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{
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'@context' => 'https://schema.org',
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'@graph' => [
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'@type' => 'NewsArticle',
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'headline' => "What's in a name",
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],
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}.to_json
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end
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it 'descends into @graph node' do
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expect(subject.title).to eq "What's in a name"
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end
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end
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end
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context 'when Open Graph protocol data is present' do
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let(:html) { <<~HTML }
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<!doctype html>
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<html>
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<head>
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<meta property="og:url" content="https://example.com/dog.html">
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<meta property="og:title" content="Man bites dog">
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<meta property="og:description" content="A dog's tale">
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<meta property="article:published_time" content="2022-01-31T19:53:00+00:00">
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<meta property="og:author" content="Charlie Brown">
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<meta property="og:locale" content="en">
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<meta property="og:image" content="https://example.com/snoopy.jpg">
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<meta property="og:image:alt" content="A good boy">
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<meta property="og:site_name" content="Pet News">
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</head>
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</html>
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HTML
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it 'extracts the expected values from open graph data' do
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expect(subject)
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.to have_attributes(
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canonical_url: eq('https://example.com/dog.html'),
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title: eq('Man bites dog'),
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description: eq("A dog's tale"),
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published_at: eq('2022-01-31T19:53:00+00:00'),
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author_name: eq('Charlie Brown'),
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language: eq('en'),
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image: eq('https://example.com/snoopy.jpg'),
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image_alt: eq('A good boy'),
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provider_name: eq('Pet News')
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)
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end
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end
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end
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