Ruby Archives - Page 55 of 120

If you've set up Errbit/Airbrake and you use Sidekiq, by default you would expect, that Errbit tracks things that happen in Sidekiq workers as well. Unfortunately it doesn't.

In order to make Sidekiq retry failed jobs in needs to catch and handle exceptions on its own. And that's the reason why you need a bit of "magic" to make it work with Errbit. You need to add an custom error handler that will notify Errbit app about errors that occured in Sidekiq workers.

To do so, just create an initializer like this:

# Errbit error catching for Sidekiq workers
Sidekiq.configure_server do |config|
  config.error_handlers << Proc.new { |ex,ctx_hash| Airbrake.notify_or_ignore(ex, ctx_hash) }
end

And that's all!

Sometimes you may want to test some Sinatra app methods in isolation (outside of a standard request flow). You probably even tried to do something like this:

require 'spec_helper'

describe App do
  subject { App.new }

  it 'expect run some specs here'
    expect(subject.current_user).to eq user
  end
end

Unfortunately you will end up with error like this:

NoMethodError: undefined method `current_user' for #<App app_file="/home/something/app.rb">
from (irb):2
from /home/.rvm/rubies/ruby-2.1.2/bin/irb:11:in `<main>'

This will occur, because Sinatra's App new method creates a Sinatra::Wrapper, not an App instance. Of course everything will work as it should, if you follow the get/post/put/delete way of testing Sinatra apps:

require 'spec_helper'

describe App do
  before { get '/api/v1/credit_cards.json' }
    
  it { expect(last_response).to be_ok }
end

but it will fail when trying to invoke any App methods directly.

Luckily there's a really simple solution to this issue. You just need to initialize it by manually allocating space and "bypassing" the new method:

require 'spec_helper'

describe App do
  subject do
    app = described_class.allocate
    app.send :initialize
    app
  end

  describe '#current_user' do
    before do
      expect(subject)
        .to receive(:params)
        .and_return(params)
        .at_least(:once)
    end

    context 'when there is no user_id' do
      let(:params) { {} }

      it { expect(subject.send :current_user).to be_nil }
    end
  end
end

That way you can get the "real" app instance (not a wrapper) that you can use as a subject in your specs. That way you can test your Sinatra app methods in isolation - without having to call a full request.

Category: Ruby

Tracking Sidekiq workers exceptions with Errbit/Airbrake

Testing Sinatra application methods in isolation with RSpec