def test_alternate(self):
p1 = Literal('hi') | Literal('hello')
p2 = Literal('hi') | 'hello'
self.assert_matches(p1, 'hi')
self.assert_matches(p2, 'hi')
self.assert_matches(p1, 'hello')
self.assert_matches(p2, 'hello')
def test_concat(self):
p1 = Literal('hel') + Literal('lo')
p2 = Literal('hel') + 'lo'
self.assert_matches(p1, 'hello')
self.assert_matches(p2, 'hello')
self.assert_doesnt_match(p1, 'hel')
self.assert_doesnt_match(p1, 'lo')
self.assert_doesnt_match(p2, 'hel')
self.assert_doesnt_match(p2, 'lo')
def test_complex_expressions_are_properly_grouped(self):
p = (Literal('a') * 3 | Literal('b')) * 2 | Literal('c') * 4
self.assert_matches(p, 'aaaaaa')
self.assert_matches(p, 'bb')
self.assert_matches(p, 'cccc')
self.assert_doesnt_match(p, '')
self.assert_doesnt_match(p, 'aaa')
self.assert_doesnt_match(p, 'b')
self.assert_doesnt_match(p, 'ccc')
def test_multiply__whatever(self):
p = Literal('a') * WHATEVER
self.assert_matches(p, 'a' * 0)
self.assert_matches(p, 'a' * 1)
self.assert_matches(p, 'a' * 3)
self.assert_matches(p, 'a' * 100)
def test_multiply__one_or_more(self):
p = Literal('a') * ONE_OR_MORE
self.assert_matches(p, 'a' * 1)
self.assert_matches(p, 'a' * 3)
self.assert_matches(p, 'a' * 100)
self.assert_doesnt_match(p, 'a' * 0)
def test_multiply__int(self):
p = Literal('a') * 3
self.assert_matches(p, 'aaa' * 3)
self.assert_matches(p, 'aaaa' * 4)
self.assert_doesnt_match(p, 'a' * 0)
self.assert_doesnt_match(p, 'a' * 1)
self.assert_doesnt_match(p, 'a' * 2)
def test_multiply__tuple(self):
p = Literal('a') * (3, 5)
self.assert_matches(p, 'a' * 3)
self.assert_matches(p, 'a' * 4)
self.assert_matches(p, 'a' * 5)
self.assert_doesnt_match(p, 'a' * 0)
self.assert_doesnt_match(p, 'a' * 1)
self.assert_doesnt_match(p, 'a' * 2)
def test_literal_value(self):
self.assert_matches(Literal('hello'), 'hello')