mirror of
https://github.com/python/cpython.git
synced 2024-11-24 18:34:43 +08:00
364 lines
11 KiB
Python
364 lines
11 KiB
Python
import parser
|
|
import unittest
|
|
from test import test_support
|
|
|
|
#
|
|
# First, we test that we can generate trees from valid source fragments,
|
|
# and that these valid trees are indeed allowed by the tree-loading side
|
|
# of the parser module.
|
|
#
|
|
|
|
class RoundtripLegalSyntaxTestCase(unittest.TestCase):
|
|
|
|
def roundtrip(self, f, s):
|
|
st1 = f(s)
|
|
t = st1.totuple()
|
|
try:
|
|
st2 = parser.sequence2st(t)
|
|
except parser.ParserError:
|
|
self.fail("could not roundtrip %r" % s)
|
|
|
|
self.assertEquals(t, st2.totuple(),
|
|
"could not re-generate syntax tree")
|
|
|
|
def check_expr(self, s):
|
|
self.roundtrip(parser.expr, s)
|
|
|
|
def check_suite(self, s):
|
|
self.roundtrip(parser.suite, s)
|
|
|
|
def test_yield_statement(self):
|
|
self.check_suite("def f(): yield 1")
|
|
self.check_suite("def f(): return; yield 1")
|
|
self.check_suite("def f(): yield 1; return")
|
|
self.check_suite("def f():\n"
|
|
" for x in range(30):\n"
|
|
" yield x\n")
|
|
|
|
def test_expressions(self):
|
|
self.check_expr("foo(1)")
|
|
self.check_expr("[1, 2, 3]")
|
|
self.check_expr("[x**3 for x in range(20)]")
|
|
self.check_expr("[x**3 for x in range(20) if x % 3]")
|
|
self.check_expr("foo(*args)")
|
|
self.check_expr("foo(*args, **kw)")
|
|
self.check_expr("foo(**kw)")
|
|
self.check_expr("foo(key=value)")
|
|
self.check_expr("foo(key=value, *args)")
|
|
self.check_expr("foo(key=value, *args, **kw)")
|
|
self.check_expr("foo(key=value, **kw)")
|
|
self.check_expr("foo(a, b, c, *args)")
|
|
self.check_expr("foo(a, b, c, *args, **kw)")
|
|
self.check_expr("foo(a, b, c, **kw)")
|
|
self.check_expr("foo + bar")
|
|
self.check_expr("lambda: 0")
|
|
self.check_expr("lambda x: 0")
|
|
self.check_expr("lambda *y: 0")
|
|
self.check_expr("lambda *y, **z: 0")
|
|
self.check_expr("lambda **z: 0")
|
|
self.check_expr("lambda x, y: 0")
|
|
self.check_expr("lambda foo=bar: 0")
|
|
self.check_expr("lambda foo=bar, spaz=nifty+spit: 0")
|
|
self.check_expr("lambda foo=bar, **z: 0")
|
|
self.check_expr("lambda foo=bar, blaz=blat+2, **z: 0")
|
|
self.check_expr("lambda foo=bar, blaz=blat+2, *y, **z: 0")
|
|
self.check_expr("lambda x, *y, **z: 0")
|
|
|
|
def test_print(self):
|
|
self.check_suite("print")
|
|
self.check_suite("print 1")
|
|
self.check_suite("print 1,")
|
|
self.check_suite("print >>fp")
|
|
self.check_suite("print >>fp, 1")
|
|
self.check_suite("print >>fp, 1,")
|
|
|
|
def test_simple_expression(self):
|
|
# expr_stmt
|
|
self.check_suite("a")
|
|
|
|
def test_simple_assignments(self):
|
|
self.check_suite("a = b")
|
|
self.check_suite("a = b = c = d = e")
|
|
|
|
def test_simple_augmented_assignments(self):
|
|
self.check_suite("a += b")
|
|
self.check_suite("a -= b")
|
|
self.check_suite("a *= b")
|
|
self.check_suite("a /= b")
|
|
self.check_suite("a %= b")
|
|
self.check_suite("a &= b")
|
|
self.check_suite("a |= b")
|
|
self.check_suite("a ^= b")
|
|
self.check_suite("a <<= b")
|
|
self.check_suite("a >>= b")
|
|
self.check_suite("a **= b")
|
|
|
|
def test_function_defs(self):
|
|
self.check_suite("def f(): pass")
|
|
self.check_suite("def f(*args): pass")
|
|
self.check_suite("def f(*args, **kw): pass")
|
|
self.check_suite("def f(**kw): pass")
|
|
self.check_suite("def f(foo=bar): pass")
|
|
self.check_suite("def f(foo=bar, *args): pass")
|
|
self.check_suite("def f(foo=bar, *args, **kw): pass")
|
|
self.check_suite("def f(foo=bar, **kw): pass")
|
|
|
|
self.check_suite("def f(a, b): pass")
|
|
self.check_suite("def f(a, b, *args): pass")
|
|
self.check_suite("def f(a, b, *args, **kw): pass")
|
|
self.check_suite("def f(a, b, **kw): pass")
|
|
self.check_suite("def f(a, b, foo=bar): pass")
|
|
self.check_suite("def f(a, b, foo=bar, *args): pass")
|
|
self.check_suite("def f(a, b, foo=bar, *args, **kw): pass")
|
|
self.check_suite("def f(a, b, foo=bar, **kw): pass")
|
|
|
|
def test_import_from_statement(self):
|
|
self.check_suite("from sys.path import *")
|
|
self.check_suite("from sys.path import dirname")
|
|
self.check_suite("from sys.path import dirname as my_dirname")
|
|
self.check_suite("from sys.path import dirname, basename")
|
|
self.check_suite(
|
|
"from sys.path import dirname as my_dirname, basename")
|
|
self.check_suite(
|
|
"from sys.path import dirname, basename as my_basename")
|
|
|
|
def test_basic_import_statement(self):
|
|
self.check_suite("import sys")
|
|
self.check_suite("import sys as system")
|
|
self.check_suite("import sys, math")
|
|
self.check_suite("import sys as system, math")
|
|
self.check_suite("import sys, math as my_math")
|
|
|
|
#
|
|
# Second, we take *invalid* trees and make sure we get ParserError
|
|
# rejections for them.
|
|
#
|
|
|
|
class IllegalSyntaxTestCase(unittest.TestCase):
|
|
|
|
def check_bad_tree(self, tree, label):
|
|
try:
|
|
parser.sequence2st(tree)
|
|
except parser.ParserError:
|
|
pass
|
|
else:
|
|
self.fail("did not detect invalid tree for %r" % label)
|
|
|
|
def test_junk(self):
|
|
# not even remotely valid:
|
|
self.check_bad_tree((1, 2, 3), "<junk>")
|
|
|
|
def test_illegal_yield_1(self):
|
|
# Illegal yield statement: def f(): return 1; yield 1
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(285,
|
|
(259,
|
|
(1, 'def'),
|
|
(1, 'f'),
|
|
(260, (7, '('), (8, ')')),
|
|
(11, ':'),
|
|
(291,
|
|
(4, ''),
|
|
(5, ''),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(275,
|
|
(1, 'return'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302, (303, (304, (305, (2, '1')))))))))))))))))),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(276,
|
|
(1, 'yield'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302,
|
|
(303, (304, (305, (2, '1')))))))))))))))))),
|
|
(4, ''))),
|
|
(6, ''))))),
|
|
(4, ''),
|
|
(0, ''))))
|
|
self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
|
|
|
|
def test_illegal_yield_2(self):
|
|
# Illegal return in generator: def f(): return 1; yield 1
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(278,
|
|
(1, 'from'),
|
|
(281, (1, '__future__')),
|
|
(1, 'import'),
|
|
(279, (1, 'generators')))),
|
|
(4, ''))),
|
|
(264,
|
|
(285,
|
|
(259,
|
|
(1, 'def'),
|
|
(1, 'f'),
|
|
(260, (7, '('), (8, ')')),
|
|
(11, ':'),
|
|
(291,
|
|
(4, ''),
|
|
(5, ''),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(275,
|
|
(1, 'return'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302, (303, (304, (305, (2, '1')))))))))))))))))),
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(272,
|
|
(276,
|
|
(1, 'yield'),
|
|
(313,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(295,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300,
|
|
(301,
|
|
(302,
|
|
(303, (304, (305, (2, '1')))))))))))))))))),
|
|
(4, ''))),
|
|
(6, ''))))),
|
|
(4, ''),
|
|
(0, ''))))
|
|
self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
|
|
|
|
def test_print_chevron_comma(self):
|
|
# Illegal input: print >>fp,
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(268,
|
|
(1, 'print'),
|
|
(35, '>>'),
|
|
(290,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(295,
|
|
(296,
|
|
(297,
|
|
(298, (299, (300, (301, (302, (303, (1, 'fp')))))))))))))),
|
|
(12, ','))),
|
|
(4, ''))),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "print >>fp,")
|
|
|
|
def test_a_comma_comma_c(self):
|
|
# Illegal input: a,,c
|
|
tree = \
|
|
(258,
|
|
(311,
|
|
(290,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(295,
|
|
(296,
|
|
(297,
|
|
(298, (299, (300, (301, (302, (303, (1, 'a')))))))))))))),
|
|
(12, ','),
|
|
(12, ','),
|
|
(290,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(295,
|
|
(296,
|
|
(297,
|
|
(298, (299, (300, (301, (302, (303, (1, 'c'))))))))))))))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "a,,c")
|
|
|
|
def test_illegal_operator(self):
|
|
# Illegal input: a $= b
|
|
tree = \
|
|
(257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(267,
|
|
(312,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(296,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300, (301, (302, (303, (304, (1, 'a'))))))))))))))),
|
|
(268, (37, '$=')),
|
|
(312,
|
|
(291,
|
|
(292,
|
|
(293,
|
|
(294,
|
|
(296,
|
|
(297,
|
|
(298,
|
|
(299,
|
|
(300, (301, (302, (303, (304, (1, 'b'))))))))))))))))),
|
|
(4, ''))),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "a $= b")
|
|
|
|
|
|
def test_main():
|
|
loader = unittest.TestLoader()
|
|
suite = unittest.TestSuite()
|
|
suite.addTest(loader.loadTestsFromTestCase(RoundtripLegalSyntaxTestCase))
|
|
suite.addTest(loader.loadTestsFromTestCase(IllegalSyntaxTestCase))
|
|
test_support.run_suite(suite)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|