#!/bin/bash

# to make the script fail safely

set -euo pipefail

out=${1:-output}

# compilation tests

function scala_compile {

  (ulimit -t 60; JAVA_OPTS="-Xmx1g" scala -Xprint:parser "$1" 2> ptmp 1> ptmp)

}

# purity test

function scala_vars {

   (egrep '\bvar\b|\breturn\b|\.par\.|\.par |ListBuffer|mutable|new Array' ptmp 2> /dev/null 1> /dev/null)

}

### compilation test

echo "collatz.scala runs?" | tee -a $out

if (scala_compile collatz.scala)

then

  echo "  --> success" | tee -a $out

  tsts0=$(( 0 ))

else

  echo "  --> scala collatz.scala did not run successfully" | tee -a $out

  tsts0=$(( 1 )) 

fi

# var, .par return, ListBuffer test

#

if  [ $tsts0 -eq 0 ]

then

  echo "collatz.scala does not contain var, return etc?" | tee -a $out

  if (scala_vars tmp)

  then

    echo "  --> test failed" | tee -a $out

    tsts=$(( 1 ))

  else

    echo "  --> success" | tee -a $out

    tsts=$(( 0 )) 

  fi

fi  

###rm tmp