# frozen_string_literal: true
RSpec.describe RetrieveTitle do
describe ".extract_title" do
it "will extract the value from the title tag" do
title = RetrieveTitle.extract_title(
"My Cool Title"
)
expect(title).to eq("My Cool Title")
end
it "will strip whitespace" do
title = RetrieveTitle.extract_title(
" Another Title\n\n "
)
expect(title).to eq("Another Title")
end
it "will pick og:title if title is missing" do
title = RetrieveTitle.extract_title(<<~HTML
HTML
)
expect(title).to eq("Good Title")
end
it "will prefer the title over the opengraph tag" do
title = RetrieveTitle.extract_title(<<~HTML
Good Title
HTML
)
expect(title).to eq("Good Title")
end
it "will parse a YouTube url from javascript" do
title = RetrieveTitle.extract_title(<<~HTML
YouTube
HTML
)
expect(title).to eq("Video Title")
end
it "will not exception out for invalid html" do
attributes = (1..1000).map { |x| " attr#{x}='1' " }.join
title = RetrieveTitle.extract_title <<~HTML
test
HTML
expect(title).to eq(nil)
end
end
describe ".crawl" do
it "can properly extract a title from a url" do
stub_request(:get, "https://brelksdjflaskfj.com/amazing")
.to_return(status: 200, body: "very amazing")
# we still resolve the IP address for every host
IPSocket.stubs(:getaddress).returns('100.2.3.4')
expect(RetrieveTitle.crawl("https://brelksdjflaskfj.com/amazing")).to eq("very amazing")
end
it "detects and uses encoding from Content-Type header" do
stub_request(:get, "https://brelksdjflaskfj.com/amazing")
.to_return(
status: 200,
body: "fancy apostrophes ’’’".dup.force_encoding('ASCII-8BIT'),
headers: { 'Content-Type' => 'text/html; charset="utf-8"' }
)
IPSocket.stubs(:getaddress).returns('100.2.3.4')
expect(RetrieveTitle.crawl("https://brelksdjflaskfj.com/amazing")).to eq("fancy apostrophes ’’’")
stub_request(:get, "https://brelksdjflaskfj.com/amazing")
.to_return(
status: 200,
body: "japanese こんにちは website".encode('EUC-JP').force_encoding('ASCII-8BIT'),
headers: { 'Content-Type' => 'text/html;charset=euc-jp' }
)
IPSocket.stubs(:getaddress).returns('100.2.3.4')
expect(RetrieveTitle.crawl("https://brelksdjflaskfj.com/amazing")).to eq("japanese こんにちは website")
end
it "can follow redirect" do
stub_request(:get, "http://foobar.com/amazing").
to_return(status: 301, body: "", headers: { "location" => "https://wikipedia.com/amazing" })
stub_request(:get, "https://wikipedia.com/amazing").
to_return(status: 200, body: "very amazing", headers: {})
IPSocket.stubs(:getaddress).returns('100.2.3.4')
expect(RetrieveTitle.crawl("http://foobar.com/amazing")).to eq("very amazing")
end
it "returns empty title if redirect uri is in blacklist" do
SiteSetting.blocked_onebox_domains = "wikipedia.com"
stub_request(:get, "http://foobar.com/amazing")
.to_return(status: 301, body: "", headers: { "location" => "https://wikipedia.com/amazing" })
stub_request(:get, "https://wikipedia.com/amazing")
.to_return(status: 200, body: "very amazing", headers: {})
expect(RetrieveTitle.crawl("http://foobar.com/amazing")).to eq(nil)
end
it "doesn't return title if a blocked domain is encountered anywhere in the redirect chain" do
SiteSetting.blocked_onebox_domains = "wikipedia.com"
stub_request(:get, "http://foobar.com/amazing")
.to_return(status: 301, body: "", headers: { "location" => "https://wikipedia.com/amazing" })
stub_request(:get, "https://wikipedia.com/amazing")
.to_return(status: 301, body: "", headers: { "location" => "https://cat.com/meow" })
stub_request(:get, "https://cat.com/meow")
.to_return(status: 200, body: "very amazing", headers: {})
expect(RetrieveTitle.crawl("http://foobar.com/amazing")).to be_blank
end
it "doesn't return title if the Discourse-No-Onebox header == 1" do
stub_request(:get, "https://cat.com/meow/no-onebox")
.to_return(
status: 200,
body: "discourse stay away",
headers: { "Discourse-No-Onebox" => "1" }
)
expect(RetrieveTitle.crawl("https://cat.com/meow/no-onebox")).to be_blank
end
it "doesn't return a title if response is unsuccessful" do
stub_request(:get, "https://example.com").to_return(status: 404, body: "")
expect(RetrieveTitle.crawl("https://example.com")).to eq(nil)
end
it "it raises errors other than Net::ReadTimeout, e.g. NoMethodError" do
stub_request(:get, "https://example.com").to_raise(NoMethodError)
expect { RetrieveTitle.crawl("https://example.com") }.to raise_error(NoMethodError)
end
it "it ignores Net::ReadTimeout errors" do
stub_request(:get, "https://example.com").to_raise(Net::ReadTimeout)
expect { RetrieveTitle.crawl("https://example.com") }.not_to raise_error
end
end
describe '.fetch_title' do
it "does not parse broken title tag" do
# webmock does not do chunks
stub_request(:get, "https://en.wikipedia.org/wiki/Internet").
to_return(status: 200, body: "Internet - Wikipedia</ti" , headers: {})
title = RetrieveTitle.fetch_title("https://en.wikipedia.org/wiki/Internet")
expect(title).to eq(nil)
end
it "can parse correct title tag" do
# webmock does not do chunks
stub_request(:get, "https://en.wikipedia.org/wiki/Internet").
to_return(status: 200, body: "<html><head><title>Internet - Wikipedia" , headers: {})
title = RetrieveTitle.fetch_title("https://en.wikipedia.org/wiki/Internet")
expect(title).to eq("Internet - Wikipedia")
end
end
end