UsesXDS

grpcurl.go

@@ -707,3 +707,8 @@ func (c *errSignalingCreds) ClientHandshake(ctx context.Context, addr string, ra
 	}
 	return conn, auth, err
 }
+
+func (c *errSignalingCreds) UsesXDS() bool {
+	xc, ok := c.TransportCredentials.(interface{ UsesXDS() bool })
+	return ok && xc.UsesXDS()
+}

xds_test.go

@@ -0,0 +1,25 @@
+package grpcurl
+
+import (
+	"testing"
+
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/credentials/xds"
+)
+
+func TestXdsWrapping(t *testing.T) {
+	x, _ := xds.NewClientCredentials(xds.ClientOptions{FallbackCreds: insecure.NewCredentials()})
+	e := &errSignalingCreds{
+		TransportCredentials: x,
+		writeResult:          nil,
+	}
+	ec := credentials.TransportCredentials(e)
+	xc, ok := ec.(interface{ UsesXDS() bool })
+	if !ok {
+		t.Errorf("expected to implement UsesXDS")
+	}
+	if !xc.UsesXDS() {
+		t.Errorf("expected to UsesXDS")
+	}
+}