Trouble with RSpec and Double Stubbing in Ruby - Unexpected Method Calls
I need some guidance on I've searched everywhere and can't find a clear answer. I've looked through the documentation and I'm still confused about I'm working with an scenario with my RSpec tests where double stubbing seems to behave unexpectedly. I have a service object that interacts with an external API, and I'm trying to test it without making actual HTTP requests. Here's a simplified version of my code: ```ruby class ApiService def fetch_data response = external_api_call process_response(response) end private def external_api_call # Simulates an HTTP request HTTP.get('https://api.example.com/data') end def process_response(response) # Process the response here end end ``` In my RSpec test, I'm trying to stub the `external_api_call` method to return a mock response: ```ruby require 'rails_helper' RSpec.describe ApiService do describe '#fetch_data' do it 'fetches data from the external API' do service = ApiService.new allow(service).to receive(:external_api_call).and_return({ data: 'mock_data' }) result = service.fetch_data expect(result).to eq(...) # expect something based on your process_response logic end end end ``` However, when I run the test, I'm getting an behavior indicating that `external_api_call` is being called despite the stub. The behavior message is: ``` 1) ApiService#fetch_data fetches data from the external API Failure/behavior: service.fetch_data RSpec::Mocks::MockExpectationError: expected: external_api_call() got: external_api_call() ``` I’ve confirmed that I’m using RSpec version 3.10.0. I've also tried using `instance_double` but that doesn't seem to help either. Is there something I'm missing here in how RSpec stubs work? It feels like the method is being called on the original object instead of the stubbed one. Any insights would be appreciated! For context: I'm using Ruby on macOS. How would you solve this? For context: I'm using Ruby on Linux. Is there a better approach? My development environment is Windows 10. Thanks for any help you can provide! Could someone point me to the right documentation?