def test_either_fails(self):
c = char('c')
x = char('x')
parser = either(c, x)
stream = Stream('i')
with self.assertRaises(ParseFailure):
parser(stream)
def test_either_ok_two(self):
c = char('c')
x = char('x')
parser = either(c, x)
stream = Stream('xirotanibmoc')
out, stream = parser(stream)
self.assertEqual(out, 'x')
self.assertEqual(stream.position, 1)
def test_either_ok_one(self):
c = char('c')
x = char('x')
parser = either(c, x)
stream = Stream('combinatorix')
out, stream = parser(stream)
self.assertEqual(out, 'c')
self.assertEqual(stream.position, 1)
def test_zero_or_more_ok_two(self):
c = char('c')
parser = zero_or_more(c)
stream = Stream('ccc')
out, stream = parser(stream)
self.assertEqual(out, ['c'] * 3)
self.assertEqual(stream.position, 3)
def test_zero_or_more_ok_one(self):
c = char('c')
parser = zero_or_more(c)
stream = Stream('')
out, stream = parser(stream)
self.assertEqual(out, [])
self.assertEqual(stream.position, 0)
def test_sequence_ok_two(self):
c = char('c')
ccc = sequence(c, c, c)
stream = Stream('cccc')
out, stream = ccc(stream)
self.assertEqual(out, list('ccc'))
self.assertEqual(stream.position, 3)
def test_unless_ok(self):
c = char('c')
parser = unless(end_of_stream, c)
stream = Stream('c')
out, stream = parser(stream)
self.assertEqual(out, 'c')
self.assertEqual(stream.position, 1)
def test_when_ok(self):
c = char('c')
parser = when(c, c)
stream = Stream('c')
out, stream = parser(stream)
self.assertEqual(out, 'c')
self.assertEqual(stream.position, 1)
def test_one_or_more_ok_two(self):
c = char('c')
parser = one_or_more(c)
stream = Stream('cccombinatorix')
out, stream = parser(stream)
self.assertEqual(out, ['c', 'c', 'c'])
self.assertEqual(stream.position, 3)
def test_zero_or_more_ok_three(self):
c = char('c')
parser = zero_or_more(c)
stream = Stream('combinatorix')
out, stream = parser(stream)
self.assertEqual(out, ['c'])
self.assertEqual(stream.position, 1)
def test_sequence_fails_two(self):
c = char('c')
ccc = sequence(c, c, c)
stream = Stream('ccx')
with self.assertRaises(ParseFailure):
ccc(stream)
def test_char_fail(self):
parser = char('x')
stream = Stream('c')
with self.assertRaises(ParseFailure):
parser(stream)
def test_char_ok(self):
parser = char('c')
stream = Stream('c')
out, stream = parser(stream)
self.assertEqual(out, 'c')
self.assertEqual(stream.position, 1)
def test_one_or_more_fails(self):
c = char('c')
parser = one_or_more(c)
stream = Stream('xxx')
with self.assertRaises(ParseFailure):
parser(stream)