From 90a4809862018f98265bb953056b4cab650b75ce Mon Sep 17 00:00:00 2001
From: guyben <guyben@google.com>
Date: Wed, 7 Feb 2018 08:04:28 -0800
Subject: [PATCH] Add debug string on checkArgument failure

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184838852
---
 java/google/registry/tools/CreateOrUpdateTldCommand.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/java/google/registry/tools/CreateOrUpdateTldCommand.java b/java/google/registry/tools/CreateOrUpdateTldCommand.java
index 1cbe8907e..1b1d9e7a6 100644
--- a/java/google/registry/tools/CreateOrUpdateTldCommand.java
+++ b/java/google/registry/tools/CreateOrUpdateTldCommand.java
@@ -271,7 +271,11 @@ abstract class CreateOrUpdateTldCommand extends MutatingCommand {
     checkArgument(roidSuffix == null || tlds.size() == 1,
         "Can't update roid suffixes on multiple TLDs simultaneously");
     for (String tld : tlds) {
-      checkArgument(tld.equals(canonicalizeDomainName(tld)));
+      checkArgument(
+          tld.equals(canonicalizeDomainName(tld)),
+          "TLD '%s' should be given in the canonical form '%s'",
+          tld,
+          canonicalizeDomainName(tld));
       checkArgument(
           !CharMatcher.javaDigit().matches(tld.charAt(0)),
           "TLDs cannot begin with a number");