def setUp(self):
self.input = "abcdefghi"
self.bw = BufferWalker(self.input, None)
def setUp(self):
self.input = "abcdefghi"
self.bw = BufferWalker(self.input, None)
class TestBufferWalker(unittest.TestCase):
"""Checks all backend parser operations work as expected
"""
def setUp(self):
self.input = "abcdefghi"
self.bw = BufferWalker(self.input, None)
def test_next(self):
for c in self.input[1:]:
self.assertEquals(self.bw.next(), c)
def test_peek(self):
for c in self.input:
self.assertEquals(self.bw.peek(), c)
self.bw.next()
def test_current(self):
for c, pos in izip(self.input, count(1)):
self.assertEquals(self.bw.current(), (c, pos))
self.bw.next()
def test_pos(self):
for c, pos in izip(self.input, count(1)):
self.assertEquals(self.bw.pos(), pos)
self.bw.next()
def test_fail(self):
self.assertRaises(NoMatch, self.bw.fail)
self.assertEquals(self.bw.peek(), 'a')
def test_tri_accept(self):
self.bw.tri(self.bw.next)
self.assertEquals(self.bw.peek(), 'b')
def test_tri_fail(self):
def fun():
self.bw.next()
self.bw.fail()
self.assertRaises(NoMatch, p(self.bw.tri, fun))
def test_commit_multiple(self):
def multiple_commits():
self.bw.commit()
self.bw.commit()
multiple_commits()
self.bw.tri(multiple_commits)
def test_commit_accept(self):
def fun():
self.bw.next()
self.bw.commit()
self.bw.tri(fun)
self.assertEquals(self.bw.peek(), 'b')
def test_commit_fail(self):
def fun():
self.bw.next()
self.bw.commit()
self.bw.fail()
self.assertRaises(NoMatch, p(self.bw.tri, fun))
self.assertEquals(self.bw.peek(), 'b')
def test_choice_null(self):
self.bw.choice()
def test_choice_accept(self):
self.bw.choice(self.bw.fail, self.bw.next)
self.bw.choice(self.bw.next, self.bw.fail)
self.bw.choice(self.bw.next, self.bw.next)
self.assertEquals(self.bw.peek(), 'd')
def test_choice_fail(self):
self.assertRaises(NoMatch, p(self.bw.choice, self.bw.fail,
self.bw.fail))
def test_choice_commit_fail(self):
def fun():
self.bw.next()
self.bw.commit()
self.bw.fail()
self.assertRaises(NoMatch, p(self.bw.choice, fun))
self.assertEquals(self.bw.peek(), 'b')
class TestBufferWalker(unittest.TestCase):
"""Checks all backend parser operations work as expected
"""
def setUp(self):
self.input = "abcdefghi"
self.bw = BufferWalker(self.input, None)
def test_next(self):
for c in self.input[1:]:
self.assertEquals(self.bw.next(), c)
def test_peek(self):
for c in self.input:
self.assertEquals(self.bw.peek(), c)
self.bw.next()
def test_current(self):
for c, pos in izip(self.input, count(1)):
self.assertEquals(self.bw.current(), (c, pos))
self.bw.next()
def test_pos(self):
for c, pos in izip(self.input, count(1)):
self.assertEquals(self.bw.pos(), pos)
self.bw.next()
def test_fail(self):
self.assertRaises(NoMatch, self.bw.fail)
self.assertEquals(self.bw.peek(), 'a')
def test_tri_accept(self):
self.bw.tri(self.bw.next)
self.assertEquals(self.bw.peek(), 'b')
def test_tri_fail(self):
def fun():
self.bw.next()
self.bw.fail()
self.assertRaises(NoMatch, p(self.bw.tri, fun))
def test_commit_multiple(self):
def multiple_commits():
self.bw.commit()
self.bw.commit()
multiple_commits()
self.bw.tri(multiple_commits)
def test_commit_accept(self):
def fun():
self.bw.next()
self.bw.commit()
self.bw.tri(fun)
self.assertEquals(self.bw.peek(), 'b')
def test_commit_fail(self):
def fun():
self.bw.next()
self.bw.commit()
self.bw.fail()
self.assertRaises(NoMatch, p(self.bw.tri, fun))
self.assertEquals(self.bw.peek(), 'b')
def test_choice_null(self):
self.bw.choice()
def test_choice_accept(self):
self.bw.choice(self.bw.fail, self.bw.next)
self.bw.choice(self.bw.next, self.bw.fail)
self.bw.choice(self.bw.next, self.bw.next)
self.assertEquals(self.bw.peek(), 'd')
def test_choice_fail(self):
self.assertRaises(NoMatch, p(self.bw.choice, self.bw.fail, self.bw.fail))
def test_choice_commit_fail(self):
def fun():
self.bw.next()
self.bw.commit()
self.bw.fail()
self.assertRaises(NoMatch, p(self.bw.choice, fun))
self.assertEquals(self.bw.peek(), 'b')