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#!/usr/bin/env python3
# -*- coding: UTF-8 -*-
import base, unittest
from ptk.regex import TokenizeError, RegexTokenizer, \
BackslashAtEndOfInputError, UnterminatedClassError, \
InvalidClassError, InvalidExponentError, \
CharacterClass, RegexCharacterClass, LitteralCharacterClass, \
AnyCharacterClass, ExponentToken, TokenizeError
class TokenizerTestCase(unittest.TestCase):
def _tokenize(self, regex):
tokenizer = RegexTokenizer(regex)
return list(tokenizer.tokens())
class BasicTestCase(TokenizerTestCase):
def test_close_bracket(self):
try:
self._tokenize('foo]')
except TokenizeError:
pass
else:
self.fail('Did not raise TokenizeError')
def test_close_brace(self):
try:
self._tokenize('foo}')
except TokenizeError:
pass
else:
self.fail('Did not raise TokenizeError')
class ConcatTestCase(TokenizerTestCase):
def test_concat(self):
t1, t2, t3 = self._tokenize('abc')
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('a')))
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('b')))
self.assertEqual((t3.type, t3.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('c')))
def test_escape(self):
t1, t2 = self._tokenize(r'\[\n')
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('[')))
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('\n')))
def test_error(self):
try:
self._tokenize('spam\\')
except BackslashAtEndOfInputError:
pass
else:
self.fail('Did not raise BackslashAtEndOfInputError')
class RangeTestCase(TokenizerTestCase):
def test_cache(self):
rx1 = RegexCharacterClass('[a-z]')
rx2 = RegexCharacterClass('[a-z]')
self.assertTrue(rx1._rx is rx2._rx)
def test_unterminated(self):
try:
self._tokenize('[acb')
except UnterminatedClassError:
pass
else:
self.fail('Did not raise UnterminatedClassError')
def test_invalid(self):
try:
self._tokenize('[b-a]')
except InvalidClassError:
pass
else:
self.fail('Did not raise InvalidClassError')
def _test_range(self, rx, testin, testout):
tokens = self._tokenize(rx)
self.assertEqual(len(tokens), 1)
type_, value, _ = tokens[0]
self.assertEqual(type_, RegexTokenizer.TOK_CLASS)
self.assertTrue(isinstance(value, CharacterClass))
for item in testin:
self.assertTrue(item in value, '"%s" should match "%s"' % (item, rx))
for item in testout:
self.assertFalse(item in value, '"%s" should not match "%s"' % (item, rx))
def test_simple(self):
self._test_range('[acb]', ['a', 'b', 'c'], [' ', 'd'])
def test_range(self):
self._test_range('[a-d]', ['a', 'b', 'c', 'd'], [' ', 'e'])
def test_ranges(self):
self._test_range('[a-cf-h]', ['a', 'b', 'c', 'f', 'g', 'h'], [' ', 'd', 'e', 'i'])
def test_minus(self):
self._test_range('[-a-c]', ['-', 'a', 'b', 'c'], [' ', 'd'])
def test_special(self):
self._test_range('[a|]', ['a', '|'], [' ', 'b'])
def test_escape(self):
self._test_range(r'[a\]]', ['a', ']'], [' ', 'b'])
def test_escape_start(self):
self._test_range(r'[\]-^]', [']', '^'], ['a'])
def test_escape_end(self):
self._test_range(r'[\\-\]]', ['\\', ']'], ['a'])
def test_class_w(self):
self._test_range(r'\w', ['\u00E9'], ['~'])
def test_class_d_class(self):
self._test_range(r'[\wa]', ['\u00E9', 'a'], ['~'])
def test_class_d(self):
self._test_range(r'\d', ['0'], ['a'])
def test_any(self):
tok1, tok2 = self._tokenize('a.')
self.assertEqual((tok1.type, tok1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('a')))
self.assertEqual((tok2.type, tok2.value), (RegexTokenizer.TOK_CLASS, AnyCharacterClass()))
class ExponentTestCase(TokenizerTestCase):
def test_invalid(self):
try:
self._tokenize('a{b}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_invalid_2(self):
try:
self._tokenize('a{1b}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_invalid_3(self):
try:
self._tokenize('a{1-2b}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_invalid_end(self):
try:
self._tokenize('a{1-a}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_unterminated(self):
try:
self._tokenize('a{1')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_unterminated_value(self):
try:
self._tokenize('a{1-}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_start(self):
try:
self._tokenize('a{-2}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_invert(self):
try:
self._tokenize('a{2-1}')
except InvalidExponentError:
pass
else:
self.fail('Did not raise InvalidExponentError')
def test_single_value(self):
t1, t2 = self._tokenize('a{42}')
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('a')))
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_EXPONENT, ExponentToken(42, 42)))
def test_interval(self):
t1, t2 = self._tokenize('a{13-15}')
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('a')))
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_EXPONENT, ExponentToken(13, 15)))
def test_kleene(self):
t1, t2 = self._tokenize('a*')
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('a')))
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_EXPONENT, ExponentToken(0, None)))
def test_closure(self):
t1, t2 = self._tokenize('a+')
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('a')))
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_EXPONENT, ExponentToken(1, None)))
class SymbolTestMixin(object):
token = None # Subclass responsibility
def test_start(self):
t1, t2 = self._tokenize(r'{symbol}s'.format(symbol=self.symbol[1]))
self.assertEqual((t1.type, t1.value), self.symbol)
self.assertEqual((t2.type, t2.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('s')))
def test_middle(self):
t1, t2, t3 = self._tokenize(r's{symbol}e'.format(symbol=self.symbol[1]))
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('s')))
self.assertEqual((t2.type, t2.value), self.symbol)
self.assertEqual((t3.type, t3.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('e')))
def test_end(self):
t1, t2 = self._tokenize(r's{symbol}'.format(symbol=self.symbol[1]))
self.assertEqual((t1.type, t1.value), (RegexTokenizer.TOK_CLASS, LitteralCharacterClass('s')))
self.assertEqual((t2.type, t2.value), self.symbol)
class LParenTestCase(SymbolTestMixin, TokenizerTestCase):
symbol = (RegexTokenizer.TOK_LPAREN, '(')
class RParenTestCase(SymbolTestMixin, TokenizerTestCase):
symbol = (RegexTokenizer.TOK_RPAREN, ')')
class UnionTestCase(SymbolTestMixin, TokenizerTestCase):
symbol = (RegexTokenizer.TOK_UNION, '|')
if __name__ == '__main__':
unittest.main()
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