AuthN: Add functions for fake (#65522)

pkg/services/authn/authntest/fake.go

@@ -6,10 +6,32 @@ import (
 	"github.com/grafana/grafana/pkg/services/authn"
 )
 
+var _ authn.Service = new(FakeService)
+
 type FakeService struct {
-	authn.Service
+	ExpectedErr      error
+	ExpectedRedirect *authn.Redirect
+	ExpectedIdentity *authn.Identity
+}
+
+func (f FakeService) Authenticate(ctx context.Context, r *authn.Request) (*authn.Identity, error) {
+	return f.ExpectedIdentity, f.ExpectedErr
+}
+
+func (f FakeService) RegisterPostAuthHook(hook authn.PostAuthHookFn, priority uint) {}
+
+func (f FakeService) Login(ctx context.Context, client string, r *authn.Request) (*authn.Identity, error) {
+	return f.ExpectedIdentity, f.ExpectedErr
+}
+
+func (f FakeService) RegisterPostLoginHook(hook authn.PostLoginHookFn, priority uint) {}
+
+func (f FakeService) RedirectURL(ctx context.Context, client string, r *authn.Request) (*authn.Redirect, error) {
+	return f.ExpectedRedirect, f.ExpectedErr
 }
 
+func (f FakeService) RegisterClient(c authn.Client) {}
+
 var _ authn.ContextAwareClient = new(FakeClient)
 
 type FakeClient struct {