Test helpers for PhoenixFlags.

Process-Scoped Stubs

stub/3 stores a value in the process dictionary, scoped to the calling process. When cache_enabled: false (test env), get/3 checks the process dictionary before falling back to the database.

This avoids DB writes and race conditions in async tests:

setup do
  MyApp.SystemConfig.Test.stub("enable_benefits", true)
  :ok
end

Cross-Process (LiveView) Tests

For LiveView and integration tests where the config is read in a different process, insert a DB row instead. The Ecto sandbox in shared mode handles isolation:

PhoenixFlags.Testing.insert_entry(MyApp.Repo, "enable_benefits", true)