Simple test case to check if GNU Cobol is actually installed

gnucoboltest001.sh

#!/bin/bash

# Created: 2014-May-29
# by Michael Peternell ( michael dot peternell at gmx dot at )
# License: you may use it if you promise to never ever sue me for anything
#          anytime, even if this script causes your computer to explode ;)

# This test case succeeds (returns 0) if the GNU Cobol compiler (cobc) is
# installed and if it can compile a simple hello world program

rm -rf t001_tmp

mkdir t001_tmp
if (($? > 0)); then
	echo T001: Cannot create temp-dir
	exit 1
fi
cd t001_tmp

echo '      * Sample COBOL program
       IDENTIFICATION DIVISION.
       PROGRAM-ID. hello.
       PROCEDURE DIVISION.
       DISPLAY "Hello World!".
       STOP RUN.' >hello.cob

echo "Hello World!" >expected_output.txt
cobc -x hello.cob 2>&1 | tee compile_output.txt
test -f hello
if (($? > 0)); then
	echo T001: Cannot compile hello world
	exit 1
fi

./hello 2>&1 > actual_output.txt
if (($? > 0)); then
	echo T001: Cannot run hello world
	exit 1
fi

diff actual_output.txt expected_output.txt >/dev/null
if (($? > 0)); then
	echo T001: Unexpected output of hello world program
	exit 1
fi

# Success
exit 0