def test_pos_lt(self):
self.assertLess(scanner.Pos('<fake>', 0, 0),
scanner.Pos('<fake>', 0, 1))
self.assertLess(scanner.Pos('<fake>', 0, 0),
scanner.Pos('<fake>', 1, 0))
self.assertGreaterEqual(scanner.Pos('<fake>', 0, 0),
scanner.Pos('<fake>', 0, 0))
def test_pprint_parse_error(self):
output = io.StringIO()
filename = '/fake/test_file.x'
text = 'oh\nwhoops\nI did an\nerror somewhere\nthat is bad'
with fakefs_util.scoped_fakefs(filename, text):
pos = scanner.Pos(filename, lineno=2, colno=0)
span = Span(pos, pos.bump_col())
error = parser.ParseError(span, 'This is bad')
parser_helpers.pprint_positional_error(error,
output=cast(
io.IOBase, output),
color=False,
error_context_line_count=3)
expected = textwrap.dedent("""\
/fake/test_file.x:2-4
0002: whoops
* 0003: I did an
^^ This is bad @ /fake/test_file.x:3:1
0004: error somewhere
""")
self.assertMultiLineEqual(expected, output.getvalue())
def test_bindings_stack(self):
top = parser.Bindings(None)
leaf0 = parser.Bindings(top)
leaf1 = parser.Bindings(top)
a = ast.BuiltinNameDef('a')
b = ast.BuiltinNameDef('b')
c = ast.BuiltinNameDef('c')
top.add('a', a)
leaf0.add('b', b)
leaf1.add('c', c)
pos = scanner.Pos(self.fake_filename, lineno=0, colno=0)
span = Span(pos, pos)
self.assertEqual(leaf0.resolve('a', span), a)
self.assertEqual(leaf1.resolve('a', span), a)
self.assertEqual(top.resolve('a', span), a)
with self.assertRaises(parser.ParseError):
top.resolve('b', span)
with self.assertRaises(parser.ParseError):
leaf1.resolve('b', span)
with self.assertRaises(parser.ParseError):
leaf0.resolve('c', span)
self.assertEqual(leaf0.resolve('b', span), b)
self.assertEqual(leaf1.resolve('c', span), c)