Rspec testing Sentry's Raven capture_exception

Question

Let's say I have this snippet of code...

  Raven.capture_exception(error, {
    extra: {
      error_message: message
    }
  })
end

I have tried to use expect(Raven).to receive(:capture_exception).with(...) and no matter how I slice this, I can not seem to bind an expect to Raven so I can verify it was sent the logging communications. It keeps telling me capture_exception is not defined. I have tried both expect and expect_any_instance_of with no luck. For now, I have skipped this, but I know there is a way. Thoughts?

Answer 1

Not completely sure of what do you want to test exactly, but this works for me:

class Test
  def self.test
    begin
      1 / 0
    rescue => exception
      Raven.capture_exception(exception)
    end
  end
end

In a test, I can setup an RSpec spy: https://relishapp.com/rspec/rspec-mocks/docs/basics/spies

it 'calls raven capture_exception' do
  allow(Raven).to receive(:capture_exception) # Setup the spy

  Test.test # Call the function that uses Raven.capture_exception

  expect(Raven).to have_received(:capture_exception) # Check that the spy was called
end