What is the best way to mock a 3rd party object in ruby?
I'm writing a test app using the twitter gem and I'd like to write an integration test but I can't figure out how to mock the objects in the Twitter namespace. Here's the function that I want to test:
def build_twitter(omniauth)
Twitter.configure do |config|
config.consumer_key = TWITTER_KEY
config.consumer_secret = TWITTER_SECRET
config.oauth_token = omniauth['credentials']['token']
config.oauth_token_secret = omniauth['credentials']['secret']
end
client = Twitter::Client.new
user = client.current_user
self.name = user.name
end
and here's the rspec test that I'm trying to write:
feature 'testing oauth' do
before(:each) do
@twitter = double("Twitter")
@twitter.stub!(:configure).and_return true
@client = double("Twitter::Client")
@client.stub!(:current_user).and_return(@user)
@user = double("Twitter::User")
@user.stub!(:name).and_return("Tester")
end
scenario 'twitter' do
visit root_path
login_with_oauth
page.should have_content("Pages#home")
end
end
But, I'm getting this error:
1) testing oauth twitter
Failure/Error: login_with_oauth
Twitter::Error::Unauthorized:
GET https://api.twitter.com/1/account/verify_credentials.json: 401: Invalid / expired Token
# ./app/models/user.rb:40:in `build_twitter'
# ./app/models/user.rb:16:in `build_authentication'
# ./app/controllers/authentications_controller.rb:47:in `create'
# ./spec/support/integration_spec_helper.rb:3:in `login_with_oauth'
# ./spec/integration/twit_test.rb:16:in `block (2 levels) in <top (required)>'
The mocks above are using rspec but I'm open to trying mocha too. Any help would be greatly appreciated.
OK, I managed to figure this out thanks to everyone's help. Here's the final test:
feature 'testing oauth' do
before(:each) do
@client = double("Twitter::Client")
@user = double("Twitter::User")
Twitter.stub!(:configure).and_return true
Twitter::Client.stub!(:new).and_return(@client)
@client.stub!(:current_user).and_return(@user)
@user.stub!(:name).and_return("Tester")
end
scenario 'twitter' do
visit root_path
login_with_oauth
page.should have_content("Pages#home")
end
end
The trick was figuring out that I needed to stub :configure and :new on the real objects and stub :current_user and :name on a dobuled object instance.
I think the problem is just the way you are using the mock, you created the mock @twitter, but you never actually use it. I think you may be under the impression that any calls to Twitter will use the stubbed methods you specified, but that's not how it works, only calls made to @twitter are stubbed.
I use double ruby, not rspec mocks, but i believe you want to do something like this instead:
Twitter.stub!(:configure).and_return true
...
Twitter::Client.stub!(:current_user).and_return @user
This ensures that anytime the methods you stubbed on Twitter, Twitter::Client are called, they respond how you want.
Also, it seems strange that this is tested as part of a view, should really be part of a controller test instead unless i'm missing something.
You can try using something like http://jondot.github.com/moxy/ . Mock Web Requests
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