Adapt test of ppmchange.c to recent change in rounding

git-svn-id: https://svn.code.sf.net/p/netpbm/code/trunk@2886 9d0c8265-081b-0410-96cb-a4ca84ce46f8

Author: giraffedata

test/ppmchange.ok

@@ -1,4 +1,9 @@
 22488533 203
 1008787190 613
-3885709071 613
-2101746192 613
+1983174784 613
+2146447222 613
+1216791938 613
+     0     0     0	    0	     78 
+     0     0   255	   29	     40 
+     0    50     2	   30	     41 
+   100     0     1	   30	     41 

test/ppmchange.test

@@ -1,6 +1,6 @@
 #! /bin/bash
 # This script tests: ppmchange
-# Also requires: ppmrainbow pgmramp
+# Also requires: ppmrainbow pgmramp ppmhist
 
 
 #  Failure message
@@ -10,17 +10,18 @@
 
 tmpdir=${tmpdir:-/tmp}
 rainbow_ppm=${tmpdir}/rainbow.ppm
+changed_ppm=${tmpdir}/changed.ppm
 
-# Explicit values for intermediate colors: rgb.txt may be defining them
-# in unusual ways.
+# Explicit values for intermediate colors: rgb.txt may not be the one
+# Netpbm provides; they may be defined in unusual ways.
 
 brown=rgb:67/43/00
 cyan=rgb:00/ff/ff
 yellow=rgb:ff/ff/00
 gray=rgb:7f/7f/7f
 
 
-# Test 1. Should print 811868957 60
+# Test 1. Should print 22488533 203
 pgmramp -lr 8 8 | ppmchange black black  white white  $gray $gray \
   -close=10 -remainder=blue | cksum
 
@@ -31,29 +32,31 @@ ppmrainbow -tmpdir=$tmpdir -width=200 -height=1 red green blue | \
   tee ${rainbow_ppm} | \
   ppmchange red $brown   green $brown   blue $brown | cksum
 
+# Validate ${rainbow_ppm}
+# Should print 1983174784 613
 
-# Test 3. Should print 3885709071 613
+cat ${rainbow_ppm} | cksum
+
+
+# Test 3. Should print 2146447222 613
 
 ppmchange red $brown   green $cyan   blue $yellow \
   -closeness=25 ${rainbow_ppm} | cksum
 
 
-# Test 4. Should print 2101746192 613
+# Test 4. Should print 1216791938 613
 
 ppmchange red rgb:64/00/01 rgb:00/ff/00 rgb:00/32/02 blue blue \
-  -remainder=black -closeness=25 ${rainbow_ppm} | cksum
+  -remainder=black -closeness=25 ${rainbow_ppm} | tee ${changed_ppm} | cksum
 
-rm ${rainbow_ppm}
+# Produce a histogram of the colors in the output image
+# Should produce
+#     0     0     0	    0	     78 
+#     0     0   255	   29	     40 
+#     0    50     2	   30	     41 
+#   100     0     1	   30	     41 
 
+ppmhist -sort=rgb -noheader ${changed_ppm}
 
-# cksum ${rainbow_ppm}
-# 1983174784 613 rainbow.ppm
 
-# ppmchange red rgb:64/00/01 rgb:00/ff/00 rgb:00/32/02 blue blue \
-#   -remainder=black -closeness=25  ${rainbow_ppm} | \
-#   pphist -sort=rgb -noheader
-#
-#     0     0     0	    0	     75
-#     0     0   255	   29	     42
-#     0    50     2	   30	     42
-#   100     0     1	   30	     41
+rm ${rainbow_ppm} ${changed_ppm}