def test_parse(self):
re_txt = "[0-9]+"
expr = regex.parse(re_txt)
self.assertEqual(
expr,
regex.SymbolSet([(48, 57)]) + regex.SymbolSet([(48, 57)]).kleene(),
)
def test_parse_optional(self):
re_txt = "a?b"
expr = regex.parse(re_txt)
self.assertEqual(expr,
regex.Symbol("a").optional() + regex.Symbol("b"))
def test_parse_or(self):
re_txt = "a|b"
expr = regex.parse(re_txt)
self.assertEqual(expr, regex.Symbol("a") | regex.Symbol("b"))
def test_parse_epsilon(self):
re_txt = ""
expr = regex.parse(re_txt)
self.assertEqual(expr, regex.EPSILON)
def test_parse(self):
re_txt = '[0-9]+'
regex.parse(re_txt)