The document discusses FakeWeb, a Ruby gem that allows stubbing and mocking HTTP requests in tests without making actual requests. It provides examples of registering fake responses for URIs with different bodies, status codes, headers, and number of requests. FakeWeb makes it possible to test code that makes web requests without needing a live connection.

1. Fake my Party
Tanja Otto
24.11.2009
Düsseldorf on Rails

2. SalesLentz::DevTeam

3. Über mich
• internes Entwicklerteam von Sales-Lentz
• IBEs für Reisen, Bustickets, Eventtickets
• seit 2006 entwickeln wir mit Ruby on Rails
• Mit Hussein Morsy Buch Ruby on Rails 2
Galileo Press
http://www.railsbuch.de
http://twitter.com/ajnato
http://devteam.sales-lentz.lu

4. HTTParty
• einfaches senden von HTTP-Anfragen
• JSON und XML werden automatisch in
Ruby-Hashes umgewandelt
• http://github.com/jnunemaker/httparty

5. HTTParty
XML
HTTParty HASH
JSON

6. Installation
sudo gem install httparty

7. Ein erstes Beispiel
require "rubygems"
require "httparty"
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
# puts response.body
# puts response.code # => 200
# puts response.message # => OK
# puts response.headers.inspect
response.each do |item|
puts item['user']['screen_name']
end
# => alexmedeiros59
# => EmySayers
# => ciquuuee
# => bray1972
# => shasoGORGEOUS
# => kimix

8. Beispiel Twitter-API
class Twitter
include HTTParty
base_uri 'twitter.com'
def initialize(u, p)
@auth = {:username => u, :password => p}
end
def timeline(which=:friends, options={})
options.merge!({:basic_auth => @auth})
self.class.get("/statuses/#{which}_timeline.json", options)
end
def post(text)
options = { :query => {:status => text}, :basic_auth => @auth }
self.class.post('/statuses/update.json', options)
end
end
twitter = Twitter.new(USERNAME, PASSWORD)
pp twitter.timeline.map{|t| t['user']['name']}

9. weitere Beispiele
• http://github.com/jnunemaker/httparty/tree/
master/examples

10. FakeWeb
• Helper, um HTTP-Anfragen zu stubben
• Testumgebungen von live-Anfragen
entkoppeln
• Tests sind auch lauffähig, wenn keine
Netzwerkverbindung besteht
• arbeitet mit allen Libraries die auf
Net::HTTP basieren
• http://github.com/chrisk/fakeweb/

11. Installation
sudo gem install fakeweb

12. Mit einfacher
Zeichenkette antworten
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json", :body => "Hello World!")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# => Hello World!
response = HTTParty.get('http://search.twitter.com/trends.json')
puts response.body
# es wird die Antwort der echten Anfrage zurückgeliefert

13. Einer Antwort einen
Status hinzufügen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json",
:body => "Nothing found",
:status => ["404", "Not Found"])
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.code # => "404"
puts response.message # => "Not Found"
puts response.body # => "Nothing found"

14. Auf jede HTTP
Methode antworten
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:any, "http://twitter.com/statuses/
public_timeline.json", :body => "response for any HTTP method")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# => response for any HTTP method
response = HTTParty.post('http://twitter.com/statuses/public_timeline.json')
puts response.body
# response for any HTTP method

15. Wiederholende Anfragen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/public_timeline.json",
[{:body => "Public Timeline", :status => ["200", "OK"]},
{:body => "Timeline not found", :status => ["404", "Not
Found"]}])
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Public Timeline
puts response.code # => 200
puts response.message # => OK
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Timeline not found
puts response.code # => 404
puts response.message # => Not Found
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Timeline not found
puts response.code # => 404
puts response.message # => Not Found

16. Wiederholende Anfragen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json",
[{:body => "Public Timeline", :status => ["200",
"OK"], :times => 2},
{:body => "Timeline not found", :status => ["404",
"Not Found"]}])
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Public Timeline
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Public Timeline
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Timeline not found

17. HTTP Authentifizierung
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://example.com/secret", :body =>
"Unauthorized", :status => ["401", "Unauthorized"])
FakeWeb.register_uri(:get, "http://user:pwd@example.com/secret", :body =>
"Authorized")
response = HTTParty.get('http://example.com/secret')
puts response.body # => Unauthorized
response = HTTParty.get('http://example.com/secret', :basic_auth => {:username
=> "user", :password => "pwd"})
puts response.body # => Authorized

18. Alle registrierten URIs
löschen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json", :body => "Hello World!")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# => Hello World!
FakeWeb.clean_registry
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# es wird die Antwort der echten Anfrage zurückgeliefert

19. Alle live Anfragen
blockieren
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.allow_net_connect = false
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
# => raises FakeWeb::NetConnectNotAllowedError
require "rubygems"
require "fakeweb"
require "httparty"
# default
FakeWeb.allow_net_connect = true
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
# live Anfrage wird gesendet

20. automatisches einlesen
einer Datei
<?xml version="1.0" encoding="UTF-8"?>
<countries>
<country>Belgien</country>
<country>Deutschland</country>
<country>Luxembourg</country>
</countries>
require "rubygems"
require "httparty"
require "fakeweb"
FakeWeb.register_uri(:get, "http://example.com/countries.xml", :body =>
'fixtures/countries.xml', :content_type => "text/xml")
response = HTTParty.get('http://example.com/countries.xml')
puts response.inspect
# => {"countries"=>{"country"=>["Belgien", "Deutschland", "Luxembourg"]}}

21. HTTP response
headers definieren
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json",
:body => "Hello World!",
:content_type => "text/plain")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Hello World!
puts response.headers.inspect # => {"content-type"=>["text/plain"]}