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+#!/bin/sh
+
+# unit test for sum.
+# Copyright 2007 by Bernhard Reutner-Fischer
+# Licensed under GPL v2 or later, see file LICENSE for details.
+
+# AUDIT: Unit tests for sum
+
+. testing.sh
+
+# testing "test name" "options" "expected result" "file input" "stdin"
+# file input will be file called "input"
+# test can create a file "actual" instead of writing to stdout
+
+testing "sum -r file doesn't print file's name" \
+ "sum -r $0 | grep -c $0 && echo wrongly_printed_filename || echo yes" \
+ "0\nyes\n" "" ""
+testing "sum -r file file does print both names" \
+ "sum -r $0 $0 | grep -c $0 && echo yes || echo wrongly_omitted_filename" \
+ "2\nyes\n" "" ""
+testing "sum -s file does print file's name" \
+ "sum -s $0 | grep -c $0 && echo yes || echo wrongly_omitted_filename" \
+ "1\nyes\n" "" ""
+exit $FAILCOUNT