#!/usr/bin/env python
'''Script to run all tests using python "unittest" module'''

__author__ = "Miki Tebeka <miki.tebeka@zoran.com>"

from unittest import TestCase, main, makeSuite, TestSuite
from os import popen, environ, remove
from glob import glob
from sys import executable, argv
from os.path import isfile, basename, splitext

# Add path to lex.py and yacc.py
environ["PYTHONPATH"] = ".."

class PLYTest(TestCase):
    '''General test case for PLY test'''
    def _runtest(self, filename):
        '''Run a single test file an compare result'''
        exp_file = filename.replace(".py", ".exp")
        self.failUnless(isfile(exp_file), "can't find %s" % exp_file)
        pipe = popen("%s %s 2>&1" % (executable, filename))
        out = pipe.read().strip()
        self.failUnlessEqual(out, open(exp_file).read().strip())


class LexText(PLYTest):
    '''Testing Lex'''
    pass

class YaccTest(PLYTest):
    '''Testing Yacc'''

    def tearDown(self):
        '''Cleanup parsetab.py[c] file'''
        for ext in (".py", ".pyc"):
            fname = "parsetab%s" % ext
            if isfile(fname):
                remove(fname)

def add_test(klass, filename):
    '''Add a test to TestCase class'''
    def t(self):
        self._runtest(filename)
    # Test name is test_FILENAME without the ./ and without the .py
    setattr(klass, "test_%s" % (splitext(basename(filename))[0]), t)

# Add lex tests
for file in glob("./lex_*.py"):
    add_test(LexText, file)
lex_suite = makeSuite(LexText, "test_")

# Add yacc tests
for file in glob("./yacc_*.py"):
    add_test(YaccTest, file)
yacc_suite = makeSuite(YaccTest, "test_")

# All tests suite
test_suite = TestSuite((lex_suite, yacc_suite))

if __name__ == "__main__":
    main()