示例#1
0
 def setUp(self):
     self.input = "abcdefghi"
     self.bw = BufferWalker(self.input, None)
示例#2
0
 def setUp(self):
     self.input = "abcdefghi"
     self.bw = BufferWalker(self.input, None)
示例#3
0
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')
示例#4
0
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')