From ee537eceeea31d071db3bcead8153f683c9cb5f9 Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Mon, 4 Mar 2019 00:18:54 +0900
Subject: `GEMNAME` is undefined in bintest

ref: https://github.com/mruby/mruby/pull/4296#discussion_r261868710
---
 test/assert.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'test/assert.rb')

diff --git a/test/assert.rb b/test/assert.rb
index 9d807d52c..158fc8ead 100644
--- a/test/assert.rb
+++ b/test/assert.rb
@@ -21,7 +21,9 @@ def assertion_string(err, str, iso=nil, e=nil, bt=nil)
   msg = "#{err}#{str}"
   msg += " [#{iso}]" if iso && !iso.empty?
   msg += " => #{e}" if e && !e.to_s.empty?
-  msg += " (#{GEMNAME == 'mruby-test' ? 'core' : "mrbgems: #{GEMNAME}"})"
+  if Object.const_defined?(:GEMNAME)
+    msg += " (#{GEMNAME == 'mruby-test' ? 'core' : "mrbgems: #{GEMNAME}"})"
+  end
   if $mrbtest_assert && $mrbtest_assert.size > 0
     $mrbtest_assert.each do |idx, assert_msg, diff|
       msg += "\n - Assertion[#{idx}] Failed: #{assert_msg}\n#{diff}"
-- 
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