mirror of
https://github.com/python/cpython.git
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3d53d8756f
This test has been changed to always use the old parser, so no need for it to be skipped.
1047 lines
38 KiB
Python
1047 lines
38 KiB
Python
import copy
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import warnings
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with warnings.catch_warnings():
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warnings.filterwarnings('ignore', 'The parser module is deprecated',
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DeprecationWarning)
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import parser
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import pickle
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import unittest
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import operator
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import struct
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import sys
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from test import support
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from test.support.script_helper import assert_python_failure
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from test.support.script_helper import assert_python_ok
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#
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# First, we test that we can generate trees from valid source fragments,
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# and that these valid trees are indeed allowed by the tree-loading side
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# of the parser module.
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#
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class RoundtripLegalSyntaxTestCase(unittest.TestCase):
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def roundtrip(self, f, s):
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st1 = f(s)
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t = st1.totuple()
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try:
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st2 = parser.sequence2st(t)
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except parser.ParserError as why:
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self.fail("could not roundtrip %r: %s" % (s, why))
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self.assertEqual(t, st2.totuple(),
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"could not re-generate syntax tree")
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def check_expr(self, s):
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self.roundtrip(parser.expr, s)
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def test_flags_passed(self):
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# The unicode literals flags has to be passed from the parser to AST
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# generation.
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suite = parser.suite("from __future__ import unicode_literals; x = ''")
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code = suite.compile()
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scope = {}
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exec(code, {}, scope)
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self.assertIsInstance(scope["x"], str)
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def check_suite(self, s):
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self.roundtrip(parser.suite, s)
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def test_yield_statement(self):
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self.check_suite("def f(): yield 1")
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self.check_suite("def f(): yield")
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self.check_suite("def f(): x += yield")
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self.check_suite("def f(): x = yield 1")
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self.check_suite("def f(): x = y = yield 1")
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self.check_suite("def f(): x = yield")
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self.check_suite("def f(): x = y = yield")
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self.check_suite("def f(): 1 + (yield)*2")
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self.check_suite("def f(): (yield 1)*2")
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self.check_suite("def f(): return; yield 1")
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self.check_suite("def f(): yield 1; return")
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self.check_suite("def f(): yield from 1")
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self.check_suite("def f(): x = yield from 1")
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self.check_suite("def f(): f((yield from 1))")
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self.check_suite("def f(): yield 1; return 1")
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self.check_suite("def f():\n"
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" for x in range(30):\n"
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" yield x\n")
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self.check_suite("def f():\n"
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" if (yield):\n"
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" yield x\n")
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def test_await_statement(self):
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self.check_suite("async def f():\n await smth()")
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self.check_suite("async def f():\n foo = await smth()")
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self.check_suite("async def f():\n foo, bar = await smth()")
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self.check_suite("async def f():\n (await smth())")
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self.check_suite("async def f():\n foo((await smth()))")
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self.check_suite("async def f():\n await foo(); return 42")
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def test_async_with_statement(self):
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self.check_suite("async def f():\n async with 1: pass")
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self.check_suite("async def f():\n async with a as b, c as d: pass")
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def test_async_for_statement(self):
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self.check_suite("async def f():\n async for i in (): pass")
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self.check_suite("async def f():\n async for i, b in (): pass")
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def test_nonlocal_statement(self):
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self.check_suite("def f():\n"
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" x = 0\n"
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" def g():\n"
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" nonlocal x\n")
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self.check_suite("def f():\n"
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" x = y = 0\n"
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" def g():\n"
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" nonlocal x, y\n")
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def test_expressions(self):
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self.check_expr("foo(1)")
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self.check_expr("[1, 2, 3]")
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self.check_expr("[x**3 for x in range(20)]")
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self.check_expr("[x**3 for x in range(20) if x % 3]")
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self.check_expr("[x**3 for x in range(20) if x % 2 if x % 3]")
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self.check_expr("list(x**3 for x in range(20))")
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self.check_expr("list(x**3 for x in range(20) if x % 3)")
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self.check_expr("list(x**3 for x in range(20) if x % 2 if x % 3)")
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self.check_expr("foo(*args)")
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self.check_expr("foo(*args, **kw)")
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self.check_expr("foo(**kw)")
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self.check_expr("foo(key=value)")
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self.check_expr("foo(key=value, *args)")
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self.check_expr("foo(key=value, *args, **kw)")
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self.check_expr("foo(key=value, **kw)")
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self.check_expr("foo(a, b, c, *args)")
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self.check_expr("foo(a, b, c, *args, **kw)")
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self.check_expr("foo(a, b, c, **kw)")
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self.check_expr("foo(a, *args, keyword=23)")
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self.check_expr("foo + bar")
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self.check_expr("foo - bar")
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self.check_expr("foo * bar")
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self.check_expr("foo / bar")
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self.check_expr("foo // bar")
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self.check_expr("(foo := 1)")
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self.check_expr("lambda: 0")
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self.check_expr("lambda x: 0")
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self.check_expr("lambda *y: 0")
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self.check_expr("lambda *y, **z: 0")
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self.check_expr("lambda **z: 0")
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self.check_expr("lambda x, y: 0")
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self.check_expr("lambda foo=bar: 0")
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self.check_expr("lambda foo=bar, spaz=nifty+spit: 0")
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self.check_expr("lambda foo=bar, **z: 0")
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self.check_expr("lambda foo=bar, blaz=blat+2, **z: 0")
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self.check_expr("lambda foo=bar, blaz=blat+2, *y, **z: 0")
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self.check_expr("lambda x, *y, **z: 0")
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self.check_expr("(x for x in range(10))")
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self.check_expr("foo(x for x in range(10))")
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self.check_expr("...")
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self.check_expr("a[...]")
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def test_simple_expression(self):
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# expr_stmt
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self.check_suite("a")
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def test_simple_assignments(self):
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self.check_suite("a = b")
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self.check_suite("a = b = c = d = e")
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def test_var_annot(self):
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self.check_suite("x: int = 5")
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self.check_suite("y: List[T] = []; z: [list] = fun()")
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self.check_suite("x: tuple = (1, 2)")
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self.check_suite("d[f()]: int = 42")
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self.check_suite("f(d[x]): str = 'abc'")
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self.check_suite("x.y.z.w: complex = 42j")
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self.check_suite("x: int")
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self.check_suite("def f():\n"
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" x: str\n"
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" y: int = 5\n")
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self.check_suite("class C:\n"
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" x: str\n"
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" y: int = 5\n")
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self.check_suite("class C:\n"
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" def __init__(self, x: int) -> None:\n"
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" self.x: int = x\n")
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# double check for nonsense
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with self.assertRaises(SyntaxError):
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exec("2+2: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("[]: int = 5", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x, *y, z: int = range(5)", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x: int = 1, y = 2", {}, {})
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with self.assertRaises(SyntaxError):
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exec("u = v: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("False: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x.False: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("x.y,: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("[0]: int", {}, {})
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with self.assertRaises(SyntaxError):
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exec("f(): int", {}, {})
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def test_simple_augmented_assignments(self):
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self.check_suite("a += b")
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self.check_suite("a -= b")
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self.check_suite("a *= b")
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self.check_suite("a /= b")
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self.check_suite("a //= b")
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self.check_suite("a %= b")
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self.check_suite("a &= b")
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self.check_suite("a |= b")
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self.check_suite("a ^= b")
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self.check_suite("a <<= b")
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self.check_suite("a >>= b")
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self.check_suite("a **= b")
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def test_function_defs(self):
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self.check_suite("def f(): pass")
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self.check_suite("def f(*args): pass")
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self.check_suite("def f(*args, **kw): pass")
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self.check_suite("def f(**kw): pass")
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self.check_suite("def f(foo=bar): pass")
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self.check_suite("def f(foo=bar, *args): pass")
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self.check_suite("def f(foo=bar, *args, **kw): pass")
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self.check_suite("def f(foo=bar, **kw): pass")
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self.check_suite("def f(a, b): pass")
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self.check_suite("def f(a, b, *args): pass")
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self.check_suite("def f(a, b, *args, **kw): pass")
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self.check_suite("def f(a, b, **kw): pass")
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self.check_suite("def f(a, b, foo=bar): pass")
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self.check_suite("def f(a, b, foo=bar, *args): pass")
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self.check_suite("def f(a, b, foo=bar, *args, **kw): pass")
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self.check_suite("def f(a, b, foo=bar, **kw): pass")
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self.check_suite("@staticmethod\n"
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"def f(): pass")
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self.check_suite("@staticmethod\n"
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"@funcattrs(x, y)\n"
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"def f(): pass")
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self.check_suite("@funcattrs()\n"
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"def f(): pass")
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self.check_suite("@False or x\n"
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"def f(): pass")
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self.check_suite("@d := x\n"
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"def f(): pass")
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self.check_suite("@lambda f: x(f)\n"
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"def f(): pass")
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self.check_suite("@[..., x, ...][1]\n"
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"def f(): pass")
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self.check_suite("@x(x)(x)\n"
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"def f(): pass")
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self.check_suite("@(x, x)\n"
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"def f(): pass")
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self.check_suite("@...\n"
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"def f(): pass")
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self.check_suite("@None\n"
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"def f(): pass")
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self.check_suite("@w @(x @y) @(z)\n"
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"def f(): pass")
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self.check_suite("@w[x].y.z\n"
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"def f(): pass")
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# keyword-only arguments
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self.check_suite("def f(*, a): pass")
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self.check_suite("def f(*, a = 5): pass")
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self.check_suite("def f(*, a = 5, b): pass")
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self.check_suite("def f(*, a, b = 5): pass")
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self.check_suite("def f(*, a, b = 5, **kwds): pass")
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self.check_suite("def f(*args, a): pass")
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self.check_suite("def f(*args, a = 5): pass")
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self.check_suite("def f(*args, a = 5, b): pass")
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self.check_suite("def f(*args, a, b = 5): pass")
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self.check_suite("def f(*args, a, b = 5, **kwds): pass")
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# positional-only arguments
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self.check_suite("def f(a, /): pass")
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self.check_suite("def f(a, /,): pass")
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self.check_suite("def f(a, b, /): pass")
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self.check_suite("def f(a, b, /, c): pass")
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self.check_suite("def f(a, b, /, c = 6): pass")
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self.check_suite("def f(a, b, /, c, *, d): pass")
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self.check_suite("def f(a, b, /, c = 1, *, d): pass")
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self.check_suite("def f(a, b, /, c, *, d = 1): pass")
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self.check_suite("def f(a, b=1, /, c=2, *, d = 3): pass")
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self.check_suite("def f(a=0, b=1, /, c=2, *, d = 3): pass")
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# function annotations
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self.check_suite("def f(a: int): pass")
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self.check_suite("def f(a: int = 5): pass")
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self.check_suite("def f(*args: list): pass")
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self.check_suite("def f(**kwds: dict): pass")
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self.check_suite("def f(*, a: int): pass")
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self.check_suite("def f(*, a: int = 5): pass")
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self.check_suite("def f() -> int: pass")
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def test_class_defs(self):
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self.check_suite("class foo():pass")
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self.check_suite("class foo(object):pass")
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self.check_suite("@class_decorator\n"
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"class foo():pass")
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self.check_suite("@class_decorator(arg)\n"
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"class foo():pass")
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self.check_suite("@decorator1\n"
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"@decorator2\n"
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"class foo():pass")
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self.check_suite("@False or x\n"
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"class C: pass")
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self.check_suite("@d := x\n"
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"class C: pass")
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self.check_suite("@lambda f: x(f)\n"
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"class C: pass")
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self.check_suite("@[..., x, ...][1]\n"
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"class C: pass")
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self.check_suite("@x(x)(x)\n"
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"class C: pass")
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self.check_suite("@(x, x)\n"
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"class C: pass")
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self.check_suite("@...\n"
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"class C: pass")
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self.check_suite("@None\n"
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"class C: pass")
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self.check_suite("@w @(x @y) @(z)\n"
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"class C: pass")
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self.check_suite("@w[x].y.z\n"
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"class C: pass")
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def test_import_from_statement(self):
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self.check_suite("from sys.path import *")
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self.check_suite("from sys.path import dirname")
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self.check_suite("from sys.path import (dirname)")
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self.check_suite("from sys.path import (dirname,)")
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self.check_suite("from sys.path import dirname as my_dirname")
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self.check_suite("from sys.path import (dirname as my_dirname)")
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self.check_suite("from sys.path import (dirname as my_dirname,)")
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self.check_suite("from sys.path import dirname, basename")
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self.check_suite("from sys.path import (dirname, basename)")
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self.check_suite("from sys.path import (dirname, basename,)")
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self.check_suite(
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"from sys.path import dirname as my_dirname, basename")
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self.check_suite(
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"from sys.path import (dirname as my_dirname, basename)")
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self.check_suite(
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"from sys.path import (dirname as my_dirname, basename,)")
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self.check_suite(
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"from sys.path import dirname, basename as my_basename")
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self.check_suite(
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"from sys.path import (dirname, basename as my_basename)")
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self.check_suite(
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"from sys.path import (dirname, basename as my_basename,)")
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self.check_suite("from .bogus import x")
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def test_basic_import_statement(self):
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self.check_suite("import sys")
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self.check_suite("import sys as system")
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self.check_suite("import sys, math")
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self.check_suite("import sys as system, math")
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self.check_suite("import sys, math as my_math")
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def test_relative_imports(self):
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self.check_suite("from . import name")
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self.check_suite("from .. import name")
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# check all the way up to '....', since '...' is tokenized
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# differently from '.' (it's an ellipsis token).
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self.check_suite("from ... import name")
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self.check_suite("from .... import name")
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self.check_suite("from .pkg import name")
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self.check_suite("from ..pkg import name")
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self.check_suite("from ...pkg import name")
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self.check_suite("from ....pkg import name")
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def test_pep263(self):
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self.check_suite("# -*- coding: iso-8859-1 -*-\n"
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"pass\n")
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def test_assert(self):
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self.check_suite("assert alo < ahi and blo < bhi\n")
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def test_with(self):
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self.check_suite("with open('x'): pass\n")
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self.check_suite("with open('x') as f: pass\n")
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self.check_suite("with open('x') as f, open('y') as g: pass\n")
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def test_try_stmt(self):
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self.check_suite("try: pass\nexcept: pass\n")
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self.check_suite("try: pass\nfinally: pass\n")
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self.check_suite("try: pass\nexcept A: pass\nfinally: pass\n")
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self.check_suite("try: pass\nexcept A: pass\nexcept: pass\n"
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"finally: pass\n")
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self.check_suite("try: pass\nexcept: pass\nelse: pass\n")
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self.check_suite("try: pass\nexcept: pass\nelse: pass\n"
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"finally: pass\n")
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def test_if_stmt(self):
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self.check_suite("if True:\n pass\nelse:\n pass\n")
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self.check_suite("if True:\n pass\nelif True:\n pass\nelse:\n pass\n")
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def test_position(self):
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# An absolutely minimal test of position information. Better
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# tests would be a big project.
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code = "def f(x):\n return x + 1"
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st = parser.suite(code)
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def walk(tree):
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node_type = tree[0]
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next = tree[1]
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if isinstance(next, (tuple, list)):
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for elt in tree[1:]:
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for x in walk(elt):
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yield x
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else:
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yield tree
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expected = [
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(1, 'def', 1, 0),
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(1, 'f', 1, 4),
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(7, '(', 1, 5),
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(1, 'x', 1, 6),
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(8, ')', 1, 7),
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(11, ':', 1, 8),
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(4, '', 1, 9),
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(5, '', 2, -1),
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(1, 'return', 2, 4),
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(1, 'x', 2, 11),
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(14, '+', 2, 13),
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(2, '1', 2, 15),
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(4, '', 2, 16),
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(6, '', 2, -1),
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(4, '', 2, -1),
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(0, '', 2, -1),
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]
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self.assertEqual(list(walk(st.totuple(line_info=True, col_info=True))),
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expected)
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self.assertEqual(list(walk(st.totuple())),
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[(t, n) for t, n, l, c in expected])
|
|
self.assertEqual(list(walk(st.totuple(line_info=True))),
|
|
[(t, n, l) for t, n, l, c in expected])
|
|
self.assertEqual(list(walk(st.totuple(col_info=True))),
|
|
[(t, n, c) for t, n, l, c in expected])
|
|
self.assertEqual(list(walk(st.tolist(line_info=True, col_info=True))),
|
|
[list(x) for x in expected])
|
|
self.assertEqual(list(walk(parser.st2tuple(st, line_info=True,
|
|
col_info=True))),
|
|
expected)
|
|
self.assertEqual(list(walk(parser.st2list(st, line_info=True,
|
|
col_info=True))),
|
|
[list(x) for x in expected])
|
|
|
|
def test_extended_unpacking(self):
|
|
self.check_suite("*a = y")
|
|
self.check_suite("x, *b, = m")
|
|
self.check_suite("[*a, *b] = y")
|
|
self.check_suite("for [*x, b] in x: pass")
|
|
|
|
def test_raise_statement(self):
|
|
self.check_suite("raise\n")
|
|
self.check_suite("raise e\n")
|
|
self.check_suite("try:\n"
|
|
" suite\n"
|
|
"except Exception as e:\n"
|
|
" raise ValueError from e\n")
|
|
|
|
def test_list_displays(self):
|
|
self.check_expr('[]')
|
|
self.check_expr('[*{2}, 3, *[4]]')
|
|
|
|
def test_set_displays(self):
|
|
self.check_expr('{*{2}, 3, *[4]}')
|
|
self.check_expr('{2}')
|
|
self.check_expr('{2,}')
|
|
self.check_expr('{2, 3}')
|
|
self.check_expr('{2, 3,}')
|
|
|
|
def test_dict_displays(self):
|
|
self.check_expr('{}')
|
|
self.check_expr('{a:b}')
|
|
self.check_expr('{a:b,}')
|
|
self.check_expr('{a:b, c:d}')
|
|
self.check_expr('{a:b, c:d,}')
|
|
self.check_expr('{**{}}')
|
|
self.check_expr('{**{}, 3:4, **{5:6, 7:8}}')
|
|
|
|
def test_argument_unpacking(self):
|
|
self.check_expr("f(*a, **b)")
|
|
self.check_expr('f(a, *b, *c, *d)')
|
|
self.check_expr('f(**a, **b)')
|
|
self.check_expr('f(2, *a, *b, **b, **c, **d)')
|
|
self.check_expr("f(*b, *() or () and (), **{} and {}, **() or {})")
|
|
|
|
def test_set_comprehensions(self):
|
|
self.check_expr('{x for x in seq}')
|
|
self.check_expr('{f(x) for x in seq}')
|
|
self.check_expr('{f(x) for x in seq if condition(x)}')
|
|
|
|
def test_dict_comprehensions(self):
|
|
self.check_expr('{x:x for x in seq}')
|
|
self.check_expr('{x**2:x[3] for x in seq if condition(x)}')
|
|
self.check_expr('{x:x for x in seq1 for y in seq2 if condition(x, y)}')
|
|
|
|
def test_named_expressions(self):
|
|
self.check_suite("(a := 1)")
|
|
self.check_suite("(a := a)")
|
|
self.check_suite("if (match := pattern.search(data)) is None: pass")
|
|
self.check_suite("while match := pattern.search(f.read()): pass")
|
|
self.check_suite("[y := f(x), y**2, y**3]")
|
|
self.check_suite("filtered_data = [y for x in data if (y := f(x)) is None]")
|
|
self.check_suite("(y := f(x))")
|
|
self.check_suite("y0 = (y1 := f(x))")
|
|
self.check_suite("foo(x=(y := f(x)))")
|
|
self.check_suite("def foo(answer=(p := 42)): pass")
|
|
self.check_suite("def foo(answer: (p := 42) = 5): pass")
|
|
self.check_suite("lambda: (x := 1)")
|
|
self.check_suite("(x := lambda: 1)")
|
|
self.check_suite("(x := lambda: (y := 1))") # not in PEP
|
|
self.check_suite("lambda line: (m := re.match(pattern, line)) and m.group(1)")
|
|
self.check_suite("x = (y := 0)")
|
|
self.check_suite("(z:=(y:=(x:=0)))")
|
|
self.check_suite("(info := (name, phone, *rest))")
|
|
self.check_suite("(x:=1,2)")
|
|
self.check_suite("(total := total + tax)")
|
|
self.check_suite("len(lines := f.readlines())")
|
|
self.check_suite("foo(x := 3, cat='vector')")
|
|
self.check_suite("foo(cat=(category := 'vector'))")
|
|
self.check_suite("if any(len(longline := l) >= 100 for l in lines): print(longline)")
|
|
self.check_suite(
|
|
"if env_base := os.environ.get('PYTHONUSERBASE', None): return env_base"
|
|
)
|
|
self.check_suite(
|
|
"if self._is_special and (ans := self._check_nans(context=context)): return ans"
|
|
)
|
|
self.check_suite("foo(b := 2, a=1)")
|
|
self.check_suite("foo(b := 2, a=1)")
|
|
self.check_suite("foo((b := 2), a=1)")
|
|
self.check_suite("foo(c=(b := 2), a=1)")
|
|
self.check_suite("{(x := C(i)).q: x for i in y}")
|
|
|
|
|
|
#
|
|
# 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_terminal(self):
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1,))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "too small items in terminal node")
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1, b'pass'))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "non-string second item in terminal node")
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1, 'pass', '0', 0))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "non-integer third item in terminal node")
|
|
tree = \
|
|
(257,
|
|
(269,
|
|
(270,
|
|
(271,
|
|
(277,
|
|
(1, 'pass', 0, 0))),
|
|
(4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "too many items in terminal node")
|
|
|
|
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_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_malformed_global(self):
|
|
#doesn't have global keyword in ast
|
|
tree = (257,
|
|
(264,
|
|
(265,
|
|
(266,
|
|
(282, (1, 'foo'))), (4, ''))),
|
|
(4, ''),
|
|
(0, ''))
|
|
self.check_bad_tree(tree, "malformed global ast")
|
|
|
|
def test_missing_import_source(self):
|
|
# from import fred
|
|
tree = \
|
|
(257,
|
|
(268,
|
|
(269,
|
|
(270,
|
|
(282,
|
|
(284, (1, 'from'), (1, 'import'),
|
|
(287, (285, (1, 'fred')))))),
|
|
(4, ''))),
|
|
(4, ''), (0, ''))
|
|
self.check_bad_tree(tree, "from import fred")
|
|
|
|
def test_illegal_encoding(self):
|
|
# Illegal encoding declaration
|
|
tree = \
|
|
(341,
|
|
(257, (0, '')))
|
|
self.check_bad_tree(tree, "missed encoding")
|
|
tree = \
|
|
(341,
|
|
(257, (0, '')),
|
|
b'iso-8859-1')
|
|
self.check_bad_tree(tree, "non-string encoding")
|
|
tree = \
|
|
(341,
|
|
(257, (0, '')),
|
|
'\udcff')
|
|
with self.assertRaises(UnicodeEncodeError):
|
|
parser.sequence2st(tree)
|
|
|
|
def test_invalid_node_id(self):
|
|
tree = (257, (269, (-7, '')))
|
|
self.check_bad_tree(tree, "negative node id")
|
|
tree = (257, (269, (99, '')))
|
|
self.check_bad_tree(tree, "invalid token id")
|
|
tree = (257, (269, (9999, (0, ''))))
|
|
self.check_bad_tree(tree, "invalid symbol id")
|
|
|
|
def test_ParserError_message(self):
|
|
try:
|
|
parser.sequence2st((257,(269,(257,(0,'')))))
|
|
except parser.ParserError as why:
|
|
self.assertIn("compound_stmt", str(why)) # Expected
|
|
self.assertIn("file_input", str(why)) # Got
|
|
|
|
|
|
|
|
class CompileTestCase(unittest.TestCase):
|
|
|
|
# These tests are very minimal. :-(
|
|
|
|
def test_compile_expr(self):
|
|
st = parser.expr('2 + 3')
|
|
code = parser.compilest(st)
|
|
self.assertEqual(eval(code), 5)
|
|
|
|
def test_compile_suite(self):
|
|
st = parser.suite('x = 2; y = x + 3')
|
|
code = parser.compilest(st)
|
|
globs = {}
|
|
exec(code, globs)
|
|
self.assertEqual(globs['y'], 5)
|
|
|
|
def test_compile_error(self):
|
|
st = parser.suite('1 = 3 + 4')
|
|
self.assertRaises(SyntaxError, parser.compilest, st)
|
|
|
|
def test_compile_badunicode(self):
|
|
st = parser.suite('a = "\\U12345678"')
|
|
self.assertRaises(SyntaxError, parser.compilest, st)
|
|
st = parser.suite('a = "\\u1"')
|
|
self.assertRaises(SyntaxError, parser.compilest, st)
|
|
|
|
def test_issue_9011(self):
|
|
# Issue 9011: compilation of an unary minus expression changed
|
|
# the meaning of the ST, so that a second compilation produced
|
|
# incorrect results.
|
|
st = parser.expr('-3')
|
|
code1 = parser.compilest(st)
|
|
self.assertEqual(eval(code1), -3)
|
|
code2 = parser.compilest(st)
|
|
self.assertEqual(eval(code2), -3)
|
|
|
|
def test_compile_filename(self):
|
|
st = parser.expr('a + 5')
|
|
code = parser.compilest(st)
|
|
self.assertEqual(code.co_filename, '<syntax-tree>')
|
|
code = st.compile()
|
|
self.assertEqual(code.co_filename, '<syntax-tree>')
|
|
for filename in 'file.py', b'file.py':
|
|
code = parser.compilest(st, filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
code = st.compile(filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
for filename in bytearray(b'file.py'), memoryview(b'file.py'):
|
|
with self.assertWarns(DeprecationWarning):
|
|
code = parser.compilest(st, filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
with self.assertWarns(DeprecationWarning):
|
|
code = st.compile(filename)
|
|
self.assertEqual(code.co_filename, 'file.py')
|
|
self.assertRaises(TypeError, parser.compilest, st, list(b'file.py'))
|
|
self.assertRaises(TypeError, st.compile, list(b'file.py'))
|
|
|
|
|
|
class ParserStackLimitTestCase(unittest.TestCase):
|
|
"""try to push the parser to/over its limits.
|
|
see http://bugs.python.org/issue1881 for a discussion
|
|
"""
|
|
def _nested_expression(self, level):
|
|
return "["*level+"]"*level
|
|
|
|
def test_deeply_nested_list(self):
|
|
# This has fluctuated between 99 levels in 2.x, down to 93 levels in
|
|
# 3.7.X and back up to 99 in 3.8.X. Related to MAXSTACK size in Parser.h
|
|
e = self._nested_expression(99)
|
|
st = parser.expr(e)
|
|
st.compile()
|
|
|
|
def test_trigger_memory_error(self):
|
|
e = self._nested_expression(100)
|
|
rc, out, err = assert_python_failure('-Xoldparser', '-c', e)
|
|
# parsing the expression will result in an error message
|
|
# followed by a MemoryError (see #11963)
|
|
self.assertIn(b's_push: parser stack overflow', err)
|
|
self.assertIn(b'MemoryError', err)
|
|
|
|
class STObjectTestCase(unittest.TestCase):
|
|
"""Test operations on ST objects themselves"""
|
|
|
|
def test_comparisons(self):
|
|
# ST objects should support order and equality comparisons
|
|
st1 = parser.expr('2 + 3')
|
|
st2 = parser.suite('x = 2; y = x + 3')
|
|
st3 = parser.expr('list(x**3 for x in range(20))')
|
|
st1_copy = parser.expr('2 + 3')
|
|
st2_copy = parser.suite('x = 2; y = x + 3')
|
|
st3_copy = parser.expr('list(x**3 for x in range(20))')
|
|
|
|
# exercise fast path for object identity
|
|
self.assertEqual(st1 == st1, True)
|
|
self.assertEqual(st2 == st2, True)
|
|
self.assertEqual(st3 == st3, True)
|
|
# slow path equality
|
|
self.assertEqual(st1, st1_copy)
|
|
self.assertEqual(st2, st2_copy)
|
|
self.assertEqual(st3, st3_copy)
|
|
self.assertEqual(st1 == st2, False)
|
|
self.assertEqual(st1 == st3, False)
|
|
self.assertEqual(st2 == st3, False)
|
|
self.assertEqual(st1 != st1, False)
|
|
self.assertEqual(st2 != st2, False)
|
|
self.assertEqual(st3 != st3, False)
|
|
self.assertEqual(st1 != st1_copy, False)
|
|
self.assertEqual(st2 != st2_copy, False)
|
|
self.assertEqual(st3 != st3_copy, False)
|
|
self.assertEqual(st2 != st1, True)
|
|
self.assertEqual(st1 != st3, True)
|
|
self.assertEqual(st3 != st2, True)
|
|
# we don't particularly care what the ordering is; just that
|
|
# it's usable and self-consistent
|
|
self.assertEqual(st1 < st2, not (st2 <= st1))
|
|
self.assertEqual(st1 < st3, not (st3 <= st1))
|
|
self.assertEqual(st2 < st3, not (st3 <= st2))
|
|
self.assertEqual(st1 < st2, st2 > st1)
|
|
self.assertEqual(st1 < st3, st3 > st1)
|
|
self.assertEqual(st2 < st3, st3 > st2)
|
|
self.assertEqual(st1 <= st2, st2 >= st1)
|
|
self.assertEqual(st3 <= st1, st1 >= st3)
|
|
self.assertEqual(st2 <= st3, st3 >= st2)
|
|
# transitivity
|
|
bottom = min(st1, st2, st3)
|
|
top = max(st1, st2, st3)
|
|
mid = sorted([st1, st2, st3])[1]
|
|
self.assertTrue(bottom < mid)
|
|
self.assertTrue(bottom < top)
|
|
self.assertTrue(mid < top)
|
|
self.assertTrue(bottom <= mid)
|
|
self.assertTrue(bottom <= top)
|
|
self.assertTrue(mid <= top)
|
|
self.assertTrue(bottom <= bottom)
|
|
self.assertTrue(mid <= mid)
|
|
self.assertTrue(top <= top)
|
|
# interaction with other types
|
|
self.assertEqual(st1 == 1588.602459, False)
|
|
self.assertEqual('spanish armada' != st2, True)
|
|
self.assertRaises(TypeError, operator.ge, st3, None)
|
|
self.assertRaises(TypeError, operator.le, False, st1)
|
|
self.assertRaises(TypeError, operator.lt, st1, 1815)
|
|
self.assertRaises(TypeError, operator.gt, b'waterloo', st2)
|
|
|
|
def test_copy_pickle(self):
|
|
sts = [
|
|
parser.expr('2 + 3'),
|
|
parser.suite('x = 2; y = x + 3'),
|
|
parser.expr('list(x**3 for x in range(20))')
|
|
]
|
|
for st in sts:
|
|
st_copy = copy.copy(st)
|
|
self.assertEqual(st_copy.totuple(), st.totuple())
|
|
st_copy = copy.deepcopy(st)
|
|
self.assertEqual(st_copy.totuple(), st.totuple())
|
|
for proto in range(pickle.HIGHEST_PROTOCOL+1):
|
|
st_copy = pickle.loads(pickle.dumps(st, proto))
|
|
self.assertEqual(st_copy.totuple(), st.totuple())
|
|
|
|
check_sizeof = support.check_sizeof
|
|
|
|
@support.cpython_only
|
|
def test_sizeof(self):
|
|
def XXXROUNDUP(n):
|
|
if n <= 1:
|
|
return n
|
|
if n <= 128:
|
|
return (n + 3) & ~3
|
|
return 1 << (n - 1).bit_length()
|
|
|
|
basesize = support.calcobjsize('Piii')
|
|
nodesize = struct.calcsize('hP3iP0h2i')
|
|
def sizeofchildren(node):
|
|
if node is None:
|
|
return 0
|
|
res = 0
|
|
hasstr = len(node) > 1 and isinstance(node[-1], str)
|
|
if hasstr:
|
|
res += len(node[-1]) + 1
|
|
children = node[1:-1] if hasstr else node[1:]
|
|
if children:
|
|
res += XXXROUNDUP(len(children)) * nodesize
|
|
for child in children:
|
|
res += sizeofchildren(child)
|
|
return res
|
|
|
|
def check_st_sizeof(st):
|
|
self.check_sizeof(st, basesize + nodesize +
|
|
sizeofchildren(st.totuple()))
|
|
|
|
check_st_sizeof(parser.expr('2 + 3'))
|
|
check_st_sizeof(parser.expr('2 + 3 + 4'))
|
|
check_st_sizeof(parser.suite('x = 2 + 3'))
|
|
check_st_sizeof(parser.suite(''))
|
|
check_st_sizeof(parser.suite('# -*- coding: utf-8 -*-'))
|
|
check_st_sizeof(parser.expr('[' + '2,' * 1000 + ']'))
|
|
|
|
|
|
# XXX tests for pickling and unpickling of ST objects should go here
|
|
|
|
class OtherParserCase(unittest.TestCase):
|
|
|
|
def test_two_args_to_expr(self):
|
|
# See bug #12264
|
|
with self.assertRaises(TypeError):
|
|
parser.expr("a", "b")
|
|
|
|
|
|
class TestDeprecation(unittest.TestCase):
|
|
def test_deprecation_message(self):
|
|
code = "def f():\n import parser\n\nf()"
|
|
rc, out, err = assert_python_ok('-c', code)
|
|
self.assertIn(b'<string>:2: DeprecationWarning', err)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|