def test_star():
a = Symbol('a*')
assert a.parse('')[1] == True
assert a.parse('aa')[0] == ''
assert a.parse('aa')[1] == 'aa'
assert a.parse('aab')[0] == 'b'
assert a.parse('aaba')[0] == 'ba'
def test_create_symbol():
"""
old test:
- manual symbol creation
- manual parsing
"""
st = "first second third fourth fifth"
sw = Symbol('\w+')
ss = Symbol(' ')
while st:
st, curr = sw.parse(st)
print("parsed: {}".format(curr))
st, space = ss.parse(st)