test

#!/bin/bash

# reset expected files whatever's checked into git:
rm -f expect/*
git checkout -- expect
rm -rf err.txt

# check the original python parts for regression using the fibonacci example
./pl0_compiler.py < examples/fibonacci.pl0 > expect/fibonacci.asm 2>err.txt
./pl0_interpreter.py < examples/fibonacci.pl0 > expect/fibonacci.run 2>>err.txt

# the graphviz output is messy so just ignore it. we'll test the .dot file only.
./pl0_graphviz.py < examples/fibonacci.pl0 2>>/dev/null
mv graph.dot expect/fibonacci.dot
rm -f graph.pdf

## retro tests ( should be easy to update for other backends )
for f in tests/*.pl0 ; do

  # strip the path and extension:
  name=${f/tests\//} ; name=${name/\.pl0/} ;

  # run the file through the retro compiler:
  errpath=./$name.err
  ./pl0_to_retro.py < $f > expect/$name.rx  2> $errpath

  # delete empty error reports
  # http://ayaz.wordpress.com/2008/02/05/bash-quickly-deleting-empty-files-in-a-directory/
  size=$(du $errpath | awk '{print $1}');
  if [ $size != 0 ]; then
    { echo
      echo "------------ $f -----------------"
      echo
      cat $errpath
    } >> err.txt
  fi;
  rm -f $errpath ;
done

## show the consolidated error report:
size=$(du err.txt | awk '{print $1}');
if [ $size == 0 ];
  then rm err.txt
  else less err.txt ;
fi;

## show changes in the generated output:
git diff --color --word-diff ./expect