Create Assert-eq, Assert-equal, etc. These are equivalent to (Assert (eq ...)) but display both the actual value and the expected value of the comparison. Use them throughout the test suite.

#!/bin/sh
if
test -r $2
then
if
cmp $1 $2 > /dev/null
then
echo $2 is unchanged
rm -f $1
else
mv -f $1 $2
fi
else
mv -f $1 $2
fi