From 0ff0d2b68a10851ffab1b8baa14f87d20869d084 Mon Sep 17 00:00:00 2001
From: don bright <hugh.m.bright@gmail.com>
Date: Tue, 27 Dec 2011 21:17:04 -0800
Subject: regression tests: fix ncc==0 false-fails when using NCC image
 comparison


diff --git a/tests/test_cmdline_tool.py b/tests/test_cmdline_tool.py
index 967e334..4538984 100755
--- a/tests/test_cmdline_tool.py
+++ b/tests/test_cmdline_tool.py
@@ -110,7 +110,7 @@ def compare_png(resultfilename):
 	elif compare_method=='NCC':
             thresh = 0.95
             ncc_err = float(output.strip())
-            if ncc_err > thresh: return True
+            if ncc_err > thresh or ncc_err==0.0: return True
             else: print >> sys.stderr, ncc_err, ' Images differ: NCC comparison < ', thresh
     return False
 
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