RSpec Service Testing

Use this skill when writing tests for service classes under spec/services/.

Core principle: Test the public contract (.call, .find, .search), not internal implementation. Use instance_double for isolation, create for integration.

Workflow: Write → Run → Verify → Fix

1. WRITE:   Write the spec (happy path + error cases + edge cases)
2. RUN:     bundle exec rspec spec/services/your_service_spec.rb
3. VERIFY:  Confirm failures are for the right reason (not a typo or missing factory)
4. FIX:     Implement or fix until the spec passes
5. SUITE:   bundle exec rspec spec/services/ — verify no regressions

DO NOT implement the service before step 1 is written and failing for the right reason.

Quick Reference