[Go] generated OAuth wire test references undefined type "<module>.Request" for a form-encoded client-credentials token endpoint #18200

Summary

With an OAuth client-credentials auth-schemes block pointing at a token endpoint whose request body is application/x-www-form-urlencoded, fern-go-sdk 1.70.0 emits a wire test (<group>/oauth_wire_test/oauth_wire_test.go) that references <module>.Request, a type that is never generated. The SDK itself compiles and every other wire test (which authenticates through option.WithClientCredentials) passes; only this test package fails go vet / go test.

Versions

• Fern CLI 5.149.0, fern generate --local
• fernapi/fern-go-sdk 1.70.0
• OpenAPI 3.1 spec, operation oauthToken = POST /api/v1/oauth/token, request body application/x-www-form-urlencoded → $ref: OauthTokenRequest (properties grant_type (required, enum), client_id, client_secret, scope, code, code_verifier, redirect_uri, refresh_token), response OauthTokenResponse (access_token, token_type, expires_in, scope, refresh_token)

generators.yml

api:
  auth: OAuth
  specs:
    - openapi: ../../../stable/openapi.json
auth-schemes:
  OAuth:
    scheme: oauth
    type: client-credentials
    client-id-env: PANGEASHIELD_CLIENT_ID
    client-secret-env: PANGEASHIELD_CLIENT_SECRET
    get-token:
      endpoint: "POST /api/v1/oauth/token"
      request-properties:
        client-id: $request.client_id
        client-secret: $request.client_secret
      response-properties:
        access-token: $response.access_token
        expires-in: $response.expires_in
groups:
  go:
    generators:
      - name: fernapi/fern-go-sdk
        version: 1.70.0
        output:
          location: local-file-system
          path: ../../../build/stable/go
        config:
          module:
            path: github.com/PangeaShield/pangeashield-sdk-go
          enableWireTests: true

Generated test (serviceaccounts/oauth_wire_test/oauth_wire_test.go, lines 60–75)

func TestOAuthGetTokenFormEncodedBody(t *testing.T) {
	transport := &requestCapturingTransport{}
	httpClient := &http.Client{Transport: transport}

	c := client.NewClient(
		option.WithBaseURL("http://localhost:8080"),
		option.WithHTTPClient(httpClient),
		option.WithClientCredentials("test_client_id", "test_client_secret"),
	)

	request := &pangeashieldsdkgo.Request{          // <-- undefined
		ClientID:     pangeashieldsdkgo.String("test_client_id"),
		ClientSecret: pangeashieldsdkgo.String("test_client_secret"),
	}

	_, err := c.ServiceAccounts.OauthToken(context.Background(), request)

The generated client method expects the real type:

func (c *Client) OauthToken(ctx context.Context, request *pangeashieldsdkgo.OauthTokenRequest, opts ...option.RequestOption) (*pangeashieldsdkgo.OauthTokenResponse, error)

Error

vet: serviceaccounts/oauth_wire_test/oauth_wire_test.go:70:32: undefined: pangeashieldsdkgo.Request

(the same reference appears again at line 119)

Expected

The test should construct &pangeashieldsdkgo.OauthTokenRequest{...} (the request-body type of the token endpoint, including its required GrantType field), or the test should be skipped when the token request is form-encoded if that is unsupported.

Workaround

CI runs go vet/go test on $(go list ./... | grep -v /oauth_wire_test).