testmywcdiff

#!/bin/bash

#---------------------------------------------------------------------
# testmywcdiff
# Author: Bob Dondero
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# testmywcdiff is a testing script for the mywc program.
# To run it, issue the command "./testmywcdiff somefile ",
# where somefile is the name of an input file.
#
# To use it, the working directory must contain:
# (1) mywcc, an executable binary file built from mywc.c, and
# (2) mywcs, an executable binary file built from mywc.s
#
# The script runs the mywcs program and the mywcc program on the
# specified file, and makes sure that the two programs have the
# same exit status and write the same characters to stdout.
#---------------------------------------------------------------------

# Validate the argument.
if [ "$#" != "1" ]; then
   echo "Usage: testmywcdiff file"
   exit 1
fi

if [ ! -e "$1" ]; then
   echo "File $1 does not exist."
   exit 1
fi

# Capture the argument.
file=$1

echo "==============================================================="
echo "Test with input file" $file
echo "==============================================================="

# Run mywcc on the input file, and capture its exit status.
./mywcc < $file > __stdout1
ret1=$?

# Run mywcs on the input file, and capture its exit status.
./mywcs < $file > __stdout2
ret2=$?

# Check the exit status.
if [ $ret1 != $ret2 ]; then
   echo
   echo "***** Exit status is incorrect."
   echo
   echo "********** This is the correct exit status:"
   echo $ret1
   echo
   echo "********** Your program had this exit status:"
   echo $ret2
   echo
fi

# Check the stdout streams.
diff -c __stdout1 __stdout2 > __diffout
if [ $? != "0" ]; then
   echo
   echo "***** stdout is incorrect."
   echo
   echo "********** This is the correct stdout:"
   cat __stdout1
   echo
   echo "********** This is your program's stdout:"
   cat __stdout2
   echo
fi

# Clean up.
echo
rm __stdout1 __stdout2 __diffout