[Slai.life (huong8373tt-beep)]

Summary

Fixes OAuth default-scope derivation so it is calculated per request instead of being persisted from the first request. This prevents a provider reused across multiple allowed hosts from sending the wrong default scope and token.

Changes

• Derive the default https://<host>/.default scope locally for each request.
• Keep explicitly configured scopes unchanged and avoid mutating the caller's array.
• Key cached access tokens by their effective scopes so tokens are not reused across hosts.
• Add regression coverage for consecutive requests to different hosts and cache reuse by effective scope.

Testing

• bundle exec rake spec — 13 examples, 0 failures
• bundle exec rubocop — 16 files inspected, no offenses
• bundle check — dependencies satisfied
• gem build microsoft_kiota_authentication_oauth.gemspec — passed
• git diff --check — passed

Disclosure

Slai Agent Runtime assisted with analysis, reproduction, implementation, and test execution. The account owner authorized this contribution and is responsible for the submission.

[Copilot]

🟢 Approval recommended

The focused implementation and regression coverage support the intended behavior, with no unresolved findings.

No open issues 🎉

What changed in this PR

This PR fixes the OAuth token provider’s reuse across allowed hosts by deriving default scopes per request and caching tokens by effective scopes.

Changes:

• Calculate request-specific default scopes without modifying configured scopes.
• Cache and reuse access tokens by effective scopes.
• Add regression coverage for multiple hosts, cache reuse, and preservation of caller-provided scopes.

File	Description
components/​authentication/​oauth/​spec/​oauth_access_token_provider_spec.rb	Tests per-request scopes, scope-keyed caching, and configured-scope preservation.
components/​authentication/​oauth/​lib/​microsoft_kiota_authentication_oauth/​oauth_access_token_provider.rb	Derives effective scopes locally, copies configured scopes, and keys cached tokens by scope.

_{Review effort: Balanced}