def _do_file_test(self, fname):
# Parse input file
lexer, parser, tokens, presult = pyless.parse(fname)
if lexer.getNumberOfSyntaxErrors() > 0:
self.fail("Lexer errors:\n" + '\n'.join(lexer.errormsgcache))
if parser.getNumberOfSyntaxErrors() > 0:
self.fail("Parser errors:\n" + '\n'.join(parser.errormsgcache))
r = presult.tree.toStringTree()
self.assertIsNotNone(r, "Parsing silently failed!")
# Save graph to dot
dotout.save_result(presult, fname+".dot")
# Tree walk
output = StringIO.StringIO()
twalker, tresult = pyless.twalk(presult, tokens, output=output)
if twalker.getNumberOfSyntaxErrors() > 0:
self.fail("Tree walker errors:\n" + '\n'.join(twalker.errormsgcache))
output.seek(0)
output2nd = self._reparse(output)
# Compare outputs - must be the same
output.seek(0)
self.assertEqual(output.getvalue(), output2nd.getvalue())
def _reparse(self, output):
# Reparse output CSS again
lexer, parser, tokens, presult = pyless.parse(output)
if lexer.getNumberOfSyntaxErrors() > 0:
self.fail("Lexer (reparse) errors:\n" + '\n'.join(lexer.errormsgcache))
if parser.getNumberOfSyntaxErrors() > 0:
self.fail("Parser (reparse) errors:\n" + '\n'.join(parser.errormsgcache))
r = presult.tree.toStringTree()
self.assertIsNotNone(r, "Parsing (reparse) silently failed!")
# Tree walk
output = StringIO.StringIO()
twalker, tresult = pyless.twalk(presult, tokens, output=output)
if twalker.getNumberOfSyntaxErrors() > 0:
self.fail("Tree walker errors:\n" + '\n'.join(twalker.errormsgcache))
output.seek(0)
return output
