Consolidates invocations of `coderdtest.New` to a single shared instance per
parent for the following tests:
- `TestOAuth2ClientMetadataValidation`
- `TestOAuth2ClientNameValidation`
- `TestOAuth2ClientScopeValidation`
- `TestOAuth2ClientMetadataEdgeCases`
> 🤖 This PR was created with the help of Coder Agents, and was
reviewed by my human. 🧑💻
Add comprehensive OAuth2 enum types to codersdk following RFC specifications:
- OAuth2ProviderGrantType (RFC 6749)
- OAuth2ProviderResponseType (RFC 6749)
- OAuth2TokenEndpointAuthMethod (RFC 7591)
- OAuth2PKCECodeChallengeMethod (RFC 7636)
- OAuth2TokenType (RFC 6749, RFC 9449)
- OAuth2RevocationTokenTypeHint (RFC 7009)
- OAuth2ErrorCode (RFC 6749, RFC 7009, RFC 8707)
Add OAuth2TokenRequest, OAuth2TokenResponse, OAuth2TokenRevocationRequest,
and OAuth2Error structs to the SDK. Update OAuth2ClientRegistrationRequest,
OAuth2ClientRegistrationResponse, OAuth2ClientConfiguration, and
OAuth2AuthorizationServerMetadata to use typed enums instead of raw strings.
This makes codersdk the single source of truth for OAuth2 types, eliminating
duplication between SDK and server-side structs.
Closes#21476
# OAuth2 Provider Code Reorganization
This PR reorganizes the OAuth2 provider code to improve separation of concerns and maintainability. The changes include:
1. Migrating OAuth2 provider app validation tests from `coderd/oauth2_test.go` to `oauth2provider/provider_test.go`
2. Moving OAuth2 client registration validation tests to `oauth2provider/validation_test.go`
3. Adding new comprehensive test files for metadata and validation edge cases
4. Renaming `OAuth2ProviderAppSecret` to `AppSecret` for better naming consistency
5. Simplifying the main integration test in `oauth2_test.go` to focus on core functionality
The PR maintains all existing test coverage while organizing the code more logically, making it easier to understand and maintain the OAuth2 provider implementation. This reorganization will help with future enhancements to the OAuth2 provider functionality.