diff --git a/quic/core/quic_types.cc b/quic/core/quic_types.cc
index 1f51dc5..48a41d8 100644
--- a/quic/core/quic_types.cc
+++ b/quic/core/quic_types.cc
@@ -515,6 +515,33 @@
   }
 }
 
+std::string MessageStatusToString(MessageStatus message_status) {
+  switch (message_status) {
+    RETURN_STRING_LITERAL(MESSAGE_STATUS_SUCCESS);
+    RETURN_STRING_LITERAL(MESSAGE_STATUS_ENCRYPTION_NOT_ESTABLISHED);
+    RETURN_STRING_LITERAL(MESSAGE_STATUS_UNSUPPORTED);
+    RETURN_STRING_LITERAL(MESSAGE_STATUS_BLOCKED);
+    RETURN_STRING_LITERAL(MESSAGE_STATUS_TOO_LARGE);
+    RETURN_STRING_LITERAL(MESSAGE_STATUS_INTERNAL_ERROR);
+    default:
+      return QuicStrCat("Unknown(", static_cast<int>(message_status), ")");
+      break;
+  }
+}
+
+std::string MessageResultToString(MessageResult message_result) {
+  if (message_result.status != MESSAGE_STATUS_SUCCESS) {
+    return QuicStrCat("{", MessageStatusToString(message_result.status), "}");
+  }
+  return QuicStrCat("{MESSAGE_STATUS_SUCCESS,id=", message_result.message_id,
+                    "}");
+}
+
+std::ostream& operator<<(std::ostream& os, const MessageResult& mr) {
+  os << MessageResultToString(mr);
+  return os;
+}
+
 std::string PacketNumberSpaceToString(PacketNumberSpace packet_number_space) {
   switch (packet_number_space) {
     RETURN_STRING_LITERAL(INITIAL_DATA);
diff --git a/quic/core/quic_types.h b/quic/core/quic_types.h
index d7206d6..972e57c 100644
--- a/quic/core/quic_types.h
+++ b/quic/core/quic_types.h
@@ -607,6 +607,9 @@
                                   // reaches an invalid state.
 };
 
+QUIC_EXPORT_PRIVATE std::string MessageStatusToString(
+    MessageStatus message_status);
+
 // Used to return the result of SendMessage calls
 struct QUIC_EXPORT_PRIVATE MessageResult {
   MessageResult(MessageStatus status, QuicMessageId message_id);
@@ -615,11 +618,17 @@
     return status == other.status && message_id == other.message_id;
   }
 
+  QUIC_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
+                                                      const MessageResult& mr);
+
   MessageStatus status;
   // Only valid when status is MESSAGE_STATUS_SUCCESS.
   QuicMessageId message_id;
 };
 
+QUIC_EXPORT_PRIVATE std::string MessageResultToString(
+    MessageResult message_result);
+
 enum WriteStreamDataResult {
   WRITE_SUCCESS,
   STREAM_MISSING,  // Trying to write data of a nonexistent stream (e.g.